Solar cell element performance evaluation device and solar cell element performance evaluation method

Abstract

A performance evaluation device (10) for a solar cell element according to an embodiment includes an evaluation unit (11) and a preparation unit (20). The evaluation unit (11) has a first light source (12) that irradiates a solar cell element (1) including a perovskite semiconductor with light, and evaluates the power generation performance of the solar cell element (1). The preparation unit (20) has a second light source (22) that irradiates light to the solar cell element (1) before the solar cell element (1) is fed to the evaluation unit (11), and prepares evaluation of the power generation performance of the solar cell element (1).

Description

Technical Field

[0001] Embodiments of the present invention relate to a performance evaluation device for a solar cell element and a performance evaluation method for a solar cell element. Background Art

[0002] A performance evaluation apparatus and a performance evaluation method for a solar cell element are required to shorten the evaluation time.

[0003] [Prior art literature]

[0004] [Patent Document]

[0005] [Patent Document 1] Japanese Patent No. 6916538 Summary of the Invention

[0006] [Technical problem to be solved by the invention]

[0007] The technical problem to be solved by the present invention is to provide a performance evaluation device and a performance evaluation method for a solar cell element that can shorten the performance evaluation time.

[0008] [Means used to solve technical problems]

[0009] A solar cell performance evaluation device according to an embodiment includes an evaluation unit and a preparation unit. The evaluation unit includes a first light source for irradiating light onto a solar cell element containing a perovskite semiconductor, thereby evaluating the power generation performance of the solar cell element. The preparation unit includes a second light source for irradiating light onto the solar cell element before it is transported to the evaluation unit, thereby preparing for evaluation of the power generation performance of the solar cell element. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic configuration diagram of the solar cell element performance evaluation device in the first embodiment.

[0011] Figure 2 It is a schematic configuration diagram of a performance evaluation device for a solar cell element in a first modification of the first embodiment.

[0012] Figure 3 is a side view of the clamping parts.

[0013] Figure 4 It is a schematic configuration diagram of a performance evaluation device for a solar cell element in a second embodiment.

[0014] Figure 5 It is a schematic configuration diagram of a performance evaluation device for a solar cell element in a third embodiment.

[0015] Figure 6 This is an expanded view of the periphery of the probe.

[0016] Figure 7 It is a top view of the stretching mechanism.

[0017] Figure 8 yes Figure 7 An enlarged view of part VIII at position A.

[0018] Figure 9 yes Figure 8 Cross-sectional view at line IX-IX.

[0019] Figure 10 yes Figure 7 An enlarged view of section X at position B.

[0020] Figure 11 yes Figure 10 Cross-sectional view at line XI-XI.

[0021] Figure 12 yes Figure 7 An enlarged view of part XII at position C.

[0022] Figure 13 yes Figure 12 Cross-sectional view taken along line XIII-XIII. DETAILED DESCRIPTION

[0023] Hereinafter, a performance evaluation apparatus for a solar cell element and a performance evaluation method for a solar cell element according to an embodiment will be described with reference to the drawings.

[0024] (First embodiment)

[0025] Figure 1 This is a schematic diagram of a solar cell element performance evaluation device 10 in the first embodiment. At least a portion of the solar cell element 1 includes a perovskite structure as a perovskite semiconductor. The perovskite structure is a type of crystal structure and is the same crystal structure as perovskite. Typically, the perovskite structure is composed of ions A, B, and X and is represented by the following general formula (1).

[0026] ABX3···(1)

[0027] As A, primary ammonium ions can be used. Specifically, CH3NH3 + (hereinafter sometimes referred to as MA), C2H5NH3 + 、C3H7NH3 + 、C4H9NH3 + , and HC(NH2)2 + (hereinafter sometimes referred to as FA), etc., preferably CH3NH3 + , but is not limited thereto. In addition, A is also preferably Cs +, Rb + , 1,1,1-trifluoro-ethylammonium iodide (FEAI), but not limited to these. As B, Pb 2+ or Sn 2+ As X, Cl - Br - or I - The materials that make up ions A, B, or X can be either single or mixed. The ions do not necessarily need to conform to the stoichiometric ratio of ABX3 to function.

[0028] The solar cell element 1 of the first embodiment is a first solar cell element 1a. The first solar cell element 1a is a tandem-type solar cell element comprising a stacked top cell and a bottom cell. The top cell comprises a perovskite semiconductor. The bottom cell comprises silicon. The first solar cell element 1a, comprising silicon, is a rigid panel-type (cell-type) solar cell element.

[0029] Solar cell element 1 has terminals 2. Terminals 2 are a pair of terminals consisting of a positive (positive) terminal 3 and a negative (negative) terminal 4, electrically connecting solar cell element 1 to the outside. First solar cell element 1a has a pair of terminals 2a (positive terminal 3a, negative terminal 4a) located on the surface of the top cell.

[0030] The solar cell element performance evaluation device 10 includes an evaluation unit 11 that evaluates the power generation performance of the solar cell element 1 .

[0031] Evaluation unit 11 measures, for example, the IV (current-voltage) curve characteristics of solar cell element 1. Evaluation unit 11 includes a first light source 12 and a measurement unit 15. First light source 12 irradiates light onto solar cell element 1. For example, first light source 12 is a xenon (Xe) lamp or a halogen lamp. Solar cell element 1 receives light, generating electrons and holes (carriers) to generate electricity. Measurement unit 15 connects a probe to terminal 2 of solar cell element 1 to measure the power generation performance of solar cell element 1.

[0032] The performance evaluation device 10 evaluates the power generation performance of the solar cell element 1 in an online manner. The performance evaluation device 10 includes a conveying device 18 for sequentially conveying the solar cell elements 1 to the evaluation section 11 one by one.

[0033] The conveyor 18 extends from the preparation section 20 described later toward the evaluation section 11. The conveyor 18 supports the solar cell elements 1 while arranging them in a row. The conveyor 18 is a pair of rails or belts. The conveyor 18 may be connected in the X-axis direction from the preparation section 20 to the evaluation section 11 by one piece, or may be divided into two or more pieces. In the case of being divided into two or more pieces, the conveying speed can be changed in the preparation section 20 and the evaluation section 11, so it is not necessary to make the distance from the preparation section 20 to the evaluation section 11 consistent with the spacing of the solar cell elements 1 in the preparation section 20. The conveyor 18 can absorb and support the solar cell elements 1 by using negative pressure, or it can support them by using claws (not shown) attached to the conveyor 18. The evaluation section 11 evaluates the power generation performance while the conveyance of the solar cell elements 1 is stopped. The conveyor 18 intermittently conveys the solar cell elements 1 each time the evaluation of the solar cell elements 1 in the evaluation section 11 is completed. By adopting an online method, one or a small number of evaluation sections 11 are sufficient, so the cost of the performance evaluation device 10 is suppressed.

[0034] In the present application, the Z direction, X direction and Y direction of the orthogonal coordinate system are defined as follows. The Z direction is the direction in which the solar cell element 1 is supported relative to the conveying device 18. For example, the Z direction is the vertical direction and the +Z direction is the upward direction. The X direction is the conveying direction in which the conveying device 18 conveys the solar cell element 1. The +X direction (first direction) is the downstream side of the conveying direction. The Y direction is the width direction of the conveying device 18. For example, the X direction and the Y direction are horizontal directions. The solar cell element 1 is arranged in the +Z direction of the conveying device 18 in a state parallel to the XY plane. The first light source 12 is arranged in the +Z direction of the conveying device 18 and irradiates light in the -Z direction. The first light source 12 can also be arranged in the -Z direction of the conveying device 18 and irradiates light in the +Z direction.

[0035] Typically, it takes a predetermined time (approximately several minutes) for a solar cell element 1 including a perovskite semiconductor to stabilize its power generation performance after it starts receiving light. The performance evaluation device 10 includes a preparation unit 20 for preparing an evaluation of the power generation performance of the solar cell element 1 .

[0036] Preparation section 20 irradiates light onto solar cell elements 1 before they are transported to evaluation section 11. Preparation section 20 is positioned in the -X direction relative to evaluation section 11. Preparation section 20 irradiates light onto a plurality of solar cell elements 1 supported by conveyor 18. Solar cell elements 1 pass through preparation section 20 within a predetermined time. Passing through preparation section 20 stabilizes the power generation performance of solar cell elements 1. Evaluation section 11 can immediately evaluate the power generation performance of solar cell elements 1 transported from preparation section 20. This shortens evaluation time by performance evaluation device 10, and improves evaluation accuracy by performance evaluation device 10.

[0037] The preparation part 20 has a second light source 22 for irradiating light to a plurality of solar cell elements 1. The second light source 22 is arranged in the +Z direction of the conveying device 18 and irradiates light in the -Z direction. The number of light sources can be one or more. The second light source 22 is limited to a light source having a light emission wavelength in the wavelength region absorbed by the solar cell element 1. For example, a xenon lamp, a high-pressure mercury lamp, a halogen lamp, an LED, etc. are listed. The irradiation range of the second light source 22 is preferably equivalent to the entire surface of the power generation area of the solar cell element 1, but is not limited thereto. For example, the second light source 22 is an LED (Light-Emitting Diode). By adopting an LED, the cost of the second light source 22 can be suppressed, and the temperature rise of the second light source 22 and the solar cell element 1 can be suppressed.

[0038] When light is irradiated onto solar cell element 1 in preparation unit 20, charge separation occurs due to the photoelectric effect, generating electrons and holes. If electrons or holes accumulate in solar cell element 1, solar cell element 1 degrades. To consume the electrons and holes generated in solar cell element 1 in preparation unit 20, resistor 31 is connected to solar cell element 1.

[0039] The preparation unit 20 of the first embodiment includes a resistor 31 , a probe 32 , and a support member 30 .

[0040] Resistor 31 is connected to the first solar cell element 1a to form a closed circuit. Resistor 31 is preferably a fixed resistor having a resistance value corresponding to the maximum output voltage (Vmpp) and maximum output current (Impp) of the first solar cell element 1a, but is not limited thereto. Resistor 31 may also be a variable resistor. The resistance value of the variable resistor is tuned to correspond to the maximum output of the connected first solar cell element 1a. Electrons and holes are efficiently consumed by these resistors 31.

[0041] The preparation unit 20 includes a plurality of resistors 31. The plurality of resistors 31 are arranged in the X direction at the same pitch as the first solar cell elements 1a. The number of resistors 31 matches the number of first solar cell elements 1a included in the preparation unit 20. Since only a small number of resistors 31 are required, the cost of the performance evaluation device 10 is reduced.

[0042] The probe 32 can connect the resistor 31 to the terminal 2 a of the first solar cell element 1 a .

[0043] The support member 30 is arranged in the +Z direction of the conveyor 18. For example, the support member 30 is a frame parallel to the XY plane. A resistor 31 and a probe 32 are mounted in the -Z direction of the support member 30. The support member 30 can move together with the probe 32 in the Z direction intersecting the surface of the terminal 2a of the first solar cell element 1a. The probe 32 can contact and separate from the terminal 2a as the support member 30 moves in the Z direction. When the support member 30 moves in the -Z direction, the probe 32 contacts the terminal 2a. As a result, the resistor 31 is connected to the first solar cell element 1a. When the support member 30 moves in the +Z direction, the probe 32 moves away from the terminal 2a. As a result, the connection between the resistor 31 and the first solar cell element 1a is released.

[0044] The control unit 90 is a microcomputer equipped with a processor such as a CPU and a GPU. The control unit 90 controls the operation of each component of the performance evaluation device 10. The functions of the control unit 90 are implemented, for example, by a processor such as a CPU executing a program. Some or all of the functions of the control unit 90 can be implemented using hardware such as an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-Programmable Gate Array), or through a combination of software and hardware.

[0045] The operation of the performance evaluation device 10 according to the first embodiment will be described.

[0046] The evaluation unit 11 evaluates the power generation performance of the first solar cell element 1a. The first light source 12 irradiates light to the first solar cell element 1a located in the evaluation unit 11. The measurement unit 15 measures the power generation performance of the first solar cell element 1a.

[0047] The preparation unit 20 irradiates light onto the first solar cell elements 1a before their power generation performance is evaluated (preparation step). The preparation unit 20 stabilizes the power generation performance of the first solar cell elements 1a before they are transported to the evaluation unit 11. The second light source 22 irradiates light onto the plurality of first solar cell elements 1a located in the preparation unit 20. A resistor 31 is connected to the first solar cell elements 1a. The resistor 31 consumes electrons or holes generated by the first solar cell elements 1a.

[0048] After the measurement of the power generation performance and before the first solar cell element 1 a is transported, the probe of the measurement unit 15 is separated from the first solar cell element 1 a located in the evaluation unit 11 .

[0049] Before conveying the first solar cell element 1a, the support member 30 of the preparation unit 20 moves in the +Z direction. The probe 32 moves away from the terminal 2 of the first solar cell element 1a located in the preparation unit 20. Before conveying the first solar cell element 1a, the connection between the first solar cell element 1a and the resistor 31 is disconnected.

[0050] The conveying device 18 conveys the first solar cell element 1 a in the +X direction.

[0051] The first solar cell element 1a after the power generation performance measurement is withdrawn from the evaluation unit 11. The first solar cell element 1a before the power generation performance measurement is entered into the evaluation unit 11.

[0052] The plurality of first solar cell elements 1a located in the preparation section 20 are shifted in the +X direction to positions of adjacent first solar cell elements 1a in the +X direction. The first solar cell elements 1a located at the +X direction end inside the preparation section 20 are withdrawn from the preparation section 20. The first solar cell elements 1a located outside the preparation section 20 in the -X direction enter the preparation section 20.

[0053] The probe of the measuring unit 15 of the evaluation unit 11 is connected to the first solar cell element 1a. The evaluation unit 11 evaluates the power generation performance of the first solar cell element 1a (evaluation step).

[0054] The support member 30 moves in the -Z direction. The probe 32 contacts the terminal 2 of the first solar cell element 1a located in the preparation unit 20. A first solar cell element 1a adjacent to the first solar cell element 1a in the -X direction, which was disconnected from the resistor 31 before the first solar cell element 1a was transported, is connected to the resistor 31 after the first solar cell element 1a is transported. The resistor 31 is sequentially connected to the plurality of first solar cell elements 1a. The preparation unit 20 irradiates light onto the first solar cell element 1a before it is transported to the evaluation unit 11.

[0055] As described in detail above, the performance evaluation device 10 for a solar cell element 1 according to the first embodiment includes an evaluation unit 11 and a preparation unit 20. The evaluation unit 11 includes a first light source 12 for irradiating light onto the solar cell element 1 including a perovskite semiconductor, thereby evaluating the power generation performance of the solar cell element 1. The preparation unit 20 includes a second light source 22 for irradiating light onto the solar cell element 1 before it is transported to the evaluation unit 11, thereby preparing for evaluation of the power generation performance of the solar cell element 1.

[0056] The performance evaluation method of the solar cell element 1 according to the first embodiment includes a preparation step and an evaluation step. In the preparation step, the solar cell element 1 is irradiated with light before the power generation performance of the solar cell element 1 including the perovskite semiconductor is evaluated. In the evaluation step, the power generation performance of the solar cell element 1 is evaluated.

[0057] Preparation unit 20 irradiates light onto solar cell element 1 before being transported to evaluation unit 11. The power generation performance of solar cell element 1 is stabilized. Evaluation unit 11 can immediately evaluate the power generation performance of solar cell element 1 transported from preparation unit 20. Evaluation time by performance evaluation device 10 is shortened.

[0058] The preparation unit 20 includes a resistor 31 connected to the first solar cell element 1 a to form a closed circuit.

[0059] When light is irradiated to the first solar cell element 1a in the preparation section 20, electrons or holes are generated. The resistor 31 consumes the electrons or holes generated in the preparation section 20, thereby suppressing the accumulation of the electrons or holes. Deterioration of the first solar cell element 1a is suppressed.

[0060] The performance evaluation apparatus 10 includes a conveyor 18 . The conveyor 18 extends in the +X direction from the preparation section 20 toward the evaluation section 11 , supports the solar cell elements 1 in parallel, and sequentially conveys the solar cell elements 1 to the evaluation section 11 .

[0061] The performance evaluation device 10 evaluates the power generation performance of the solar cell element 1 in an online manner. Since only one or a small number of evaluation units 11 are required, the cost of the performance evaluation device 10 can be suppressed.

[0062] Before conveying the first solar cell element 1a, the first solar cell element 1a is disconnected from the resistor 31. The first solar cell element 1a located in the -X direction and the resistor 31 are connected after conveying the first solar cell element 1a.

[0063] Resistors 31 are sequentially connected to the plurality of first solar cell elements 1a. The number of resistors 31 matches the number of first solar cell elements 1a included in the preparation unit 20. Since only a small number of resistors 31 are required, the cost of the performance evaluation apparatus 10 can be suppressed.

[0064] The preparation unit 20 includes a resistor 31 and a probe 32. The probe 32 can connect the resistor 31 to the first solar cell element 1a. The probe 32 can move in the Z direction intersecting the surface of the terminal of the first solar cell element 1a.

[0065] The support member 30 supporting the probe 32 cooperates with the conveyor 18 to sequentially connect the resistors 31 to the plurality of first solar cell elements 1a. Since only a small number of resistors 31 are required, the cost of the performance evaluation apparatus 10 can be suppressed.

[0066] The second light source 22 is an LED.

[0067] By using LEDs, the cost of the second light source 22 is reduced, and the temperature rise of the second light source 22 and the solar cell element 1 is suppressed. The LED is preferably a white LED, but may also be a blue LED, a green LED, a red LED, or the like.

[0068] Figure 2 1 is a schematic configuration diagram of a solar cell element performance evaluation device 10 in a first modification of the first embodiment.

[0069] The solar cell element 1 of the first modified example is a second solar cell element 1b. Like the first solar cell element 1a, the second solar cell element 1b is a tandem-type solar cell element comprising a stack of top and bottom cells. The second solar cell element 1b has terminals 2b disposed on both the top and bottom cell surfaces.

[0070] The preparation unit 20 of the performance evaluation device 10 of the first modified example includes a plurality of clamping members 40. The number of clamping members 40 matches the number of second solar cell elements 1b included in the preparation unit 20. The clamping members 40 are positioned at the ends of the second solar cell elements 1b in the -Y direction. The plurality of clamping members 40 are supported by support rods 44 extending in the X direction.

[0071] Figure 3 4 is a side view of the clamping member 40. The clamping member 40 includes a pair of rods 45, a pair of probes 42, a resistor 41, and an actuator 46.

[0072] The pair of rods 45 are formed of an electrically insulating material such as resin. The pair of rods 45 are arranged in the Z direction with the support rod 44 interposed therebetween. The rods 45 extend in the Y direction when viewed from above. The rods 45 are rotatable about the support rod 44.

[0073] A pair of probes 42 extends from the resistor 41. The pair of probes 42 is attached to the front ends in the +Y direction of the pair of rods 45. The pair of probes 42 can connect the resistor 41 and the second solar cell element 1b.

[0074] The resistor 41 is connected to the second solar cell element 1 b to form a closed circuit.

[0075] The actuator 46 is, for example, a pneumatic piston. The actuator 46 is positioned between a pair of rods 45 on the support rod 44 in the -Y direction. The second solar cell element 1b is positioned between a pair of rods 45 on the support rod 44 in the +Y direction. The actuator 46 extends and contracts, moving the +Y-direction tips of the pair of rods 45 in the Z direction. The actuator 46 moves the pair of probes 42 in the Z direction via the pair of rods 45. The pair of probes 42 are movable in the Z direction, intersecting the surface of the terminal 2b of the second solar cell element 1b.

[0076] When actuator 46 extends, the +Y-direction tips of the pair of rods 45 approach each other. The pair of probes 42 contact the terminals 2b located on both sides of the second solar cell element 1b. When actuator 46 contracts, the +Y-direction tips of the pair of rods 45 separate from each other. The pair of probes 42 move away from the terminals 2b located on both sides of the second solar cell element 1b. Actuator 46 can adjust the pressing force of the pair of probes 42 against the terminals 2b of the second solar cell element 1b. Because the pair of probes 42 are actuated by a single actuator 46, the cost of the performance evaluation device 10 is reduced.

[0077] In the performance evaluation device 10 of the first modified example, similarly to the first embodiment, the second solar cell element 1b is connected to and disconnected from the resistor 41. Before transporting the second solar cell element 1b, the second solar cell element 1b is disconnected from the resistor 41. A second solar cell element 1b adjacent in the -X direction to the second solar cell element 1b whose connection to the resistor 41 has been disconnected is connected to the resistor 41 after the second solar cell element 1b is transported. The resistor 41 is connected sequentially to the plurality of second solar cell elements 1b.

[0078] (Second embodiment)

[0079] Figure 4 This is a schematic diagram of a solar cell performance evaluation device 10 according to a second embodiment. The solar cell performance evaluation device 10 according to the second embodiment differs from the first embodiment in that, while the resistor 51 is connected to the first solar cell element 1a, it moves synchronously with the first solar cell element 1a. The description of the second embodiment regarding portions common to the first embodiment may be omitted.

[0080] The solar cell element 1 of the second embodiment is the same first solar cell element 1 a as that of the first embodiment.

[0081] The preparation unit 20 of the performance evaluation device 10 according to the second embodiment includes a rotating member 50 , a resistor 51 , and a probe 52 .

[0082] The rotating member 50 is disposed in the +Z direction of the conveyor 18. For example, the rotating member 50 is an endless crawler-shaped object. The surface of the rotating member 50 is covered with an insulating material. The rotating member 50 can rotate parallel to the XZ plane.

[0083] A synchronous moving portion 54 is formed at the end of the rotating member 50 in the -Z direction. The synchronous moving portion 54 is capable of moving in the +X direction in synchronization with the conveyor 18. The synchronous moving portion 54 moves and stops at the same timing as the conveyor 18. The synchronous moving portion 54 moves at the same speed as the conveyor 18. The synchronous moving portion 54 is located within a range that includes the preparation unit 20 in the X direction.

[0084] The resistors 51 are connected to the first solar cell elements 1a to form a closed circuit. The rotating member 50 holds a plurality of resistors 51 between the annular caterpillar-shaped objects. The plurality of resistors 51 are arranged in a circumferential direction of the rotating member 50 at the same pitch as the first solar cell elements 1a.

[0085] The probe 52 can connect the resistor 51 to the terminal 2 a of the first solar cell element 1 a .

[0086] The rotating member 50 holds a resistor 51 and a probe 52. The rotating member 50 is movable in the Z direction intersecting the surface of the terminal 2a of the first solar cell element 1a together with the probe 52. The probe 52 can contact and separate from the terminal 2a of the first solar cell element 1a as the rotating member 50 moves in the Z direction.

[0087] The operation of the performance evaluation device 10 according to the second embodiment will be described.

[0088] The evaluation unit 11 evaluates the power generation performance of the first solar cell element 1 a .

[0089] The second light source 22 of the preparation unit 20 irradiates light to the first solar cell element 1a before being transported to the evaluation unit 11. The resistor 51 held by the synchronous moving portion 54 of the rotating member 50 is connected to the first solar cell element 1a.

[0090] After the evaluation of power generation performance in the evaluation unit 11, the conveyor 18 conveys the first solar cell element 1a in the +X direction. The synchronously moving portion 54 of the rotating member 50 moves in the +X direction in synchronization with the conveyor 18. The resistor 51, while connected to the first solar cell element 1a, moves in the +X direction in synchronization with the first solar cell element 1a.

[0091] The first solar cell element 1a located at the +X end of the inner side of the preparation section 20 exits the preparation section 20. The resistor 51 connected to the exiting first solar cell element 1a moves in the +Z direction as the rotating member 50 rotates and exits the synchronously moving portion 54. The connection between the first solar cell element 1a exiting the preparation section 20 and the resistor 51 exiting the synchronously moving portion 54 is released. The first solar cell element 1a located outside the preparation section 20 in the -X direction enters the preparation section 20. As the rotating member 50 rotates, the resistor 51 moving in the -Z direction enters the synchronously moving portion 54. The first solar cell element 1a entering the preparation section 20 is connected to the resistor 51 entering the synchronously moving portion 54. The resistor 51 is connected to all the first solar cell elements 1a located in the preparation section 20.

[0092] The rotating member 50 moves in the -Z direction while rotating or after stopping. The probe 52 held by the rotating member 50 moves in the -Z direction. Even if a gap is formed between the terminal 2a of the first solar cell element 1a and the probe 52, the movement of the probe 52 in the -Z direction can eliminate the gap. This improves the reliability of the connection between the first solar cell element 1a and the resistor 51.

[0093] As described above in detail, in the performance evaluation device 10 of the second embodiment, the resistor 51 moves in synchronization with the first solar cell element 1 a while being connected to the first solar cell element 1 a .

[0094] The resistor 51 having a resistance value corresponding to the maximum output of the first solar cell element 1a continues to be connected to the first solar cell element 1a. Electrons and holes are efficiently consumed, and degradation of the first solar cell element 1a is suppressed.

[0095] The performance evaluation device 10 further includes an annular rotating member 50 . The rotating member 50 includes a synchronously moving portion 54 that can move synchronously with the conveying device 18 .

[0096] The annular rotating member 50 rotates, thereby continuously forming the synchronous moving portion 54. The resistor 51 is connected to all the first solar cell elements 1a passing through the preparation section 20.

[0097] The rotating member 50 holds a resistor 51 and a probe 52 capable of connecting the resistor 51 to the first solar cell element 1a. The rotating member 50 is movable in the Z direction intersecting the surface of the terminal 2a of the first solar cell element 1a.

[0098] Even if a gap is generated between the terminal 2a of the first solar cell element 1a and the probe 52, the gap can be eliminated by moving the probe 52 in the -Z direction, thereby improving the reliability of the connection between the first solar cell element 1a and the resistor 51.

[0099] (Third embodiment)

[0100] Figure 5 This is a schematic diagram of a solar cell performance evaluation device 10 according to a third embodiment. The solar cell performance evaluation device 10 according to the third embodiment differs from the second embodiment in that a rotating member 60 holds a probe 62 capable of connecting a cable 6 extending from a third solar cell element 1c to a resistor 61. The description of the third embodiment will sometimes be omitted for portions identical to those of the first or second embodiment.

[0101] The solar cell element 1 of the third embodiment is a third solar cell element 1c. The third solar cell element 1c is formed by arranging a plurality of cells containing a perovskite semiconductor on a film substrate and connecting them to each other. The third solar cell element 1c is a flexible module-type solar cell element.

[0102] The third solar cell element 1c includes a pair of cables 6. The cables 6 extend from the ends of the third solar cell element 1c in the -Y direction toward the outside of the third solar cell element 1c. The cables 6 can electrically connect the third solar cell element 1c to the outside.

[0103] The preparation unit 20 of the performance evaluation device 10 according to the third embodiment includes a rotating member 60, a resistor 61, a probe 62, and a stretching mechanism 70 (see FIG. Figure 7 ).

[0104] The rotating member 60 is positioned in the -Y direction relative to the conveyor 18. For example, the rotating member 60 is a looped wire. The rotating member 60 is rotatable parallel to the XZ plane. A synchronously movable portion 64 is formed at the -Z end of the rotating member 60. The synchronously movable portion 64 is capable of moving in the +X direction in synchronization with the conveyor 18. The synchronously movable portion 64 extends in the X direction from position A in the -X direction of the preparation section 20 to position C in the +X direction of the evaluation section 11. The rotating member 60 is also movable in the Z direction.

[0105] Figure 6 It is a development view of the periphery of the probe 62 .

[0106] The resistor 61 is connected to the third solar cell element 1c to form a closed circuit. The resistor 61 is arranged away from the rotating member 60 in the -Y direction. The plurality of resistors 61 are arranged in the X direction at the same pitch as the third solar cell element 1c (see Figure 5 The resistor 61 has a pair of connection pads 61p. The connection pads 61p can electrically connect the resistor 61 to the outside. The surface of the connection pads 61p is parallel to the XY plane. The rotating member 60 can move in the Z direction intersecting the surface of the connection pads 61p.

[0107] The probes 62 are held by the rotating member 60. The plurality of probes 62 are arranged in a row in the circumferential direction of the rotating member 60 at the same pitch as the third solar cell element 1c (see Figure 5 The end of the probe 62 in the +Y direction can be connected to the cable 6 of the third solar cell element 1c. The end of the probe 62 in the -Y direction can contact the connection pad 61p of the resistor 61. Thus, the probe 62 can connect the resistor 61 to the third solar cell element 1c. The probe 62 can contact and separate from the connection pad 61p of the resistor 61 as the rotating member 60 moves in the Z direction.

[0108] like Figure 5 As shown, the measurement section 15 of the evaluation unit 11 of the performance evaluation device 10 has a pair of connection pads 15p. The connection pads 15p of the measurement section 15 are located at the same positions as the connection pads 61p of the resistor 61 in the Y and Z directions. The probe 62 can contact the connection pads 15p of the measurement section 15. This allows the probe 62 to connect the measurement section 15 to the third solar cell element 1c.

[0109] As described above, the third solar cell element 1c is flexible. If the third solar cell element 1c is in a bent state, the conveying device 18 cannot absorb the third solar cell element 1c. If the third solar cell element 1c is in a bent state, the first light source 12 and the second light source 22 cannot fully irradiate the third solar cell element 1c. Figure 7 ) The third solar cell element 1c is stretched in the Y direction, which intersects the light irradiation direction of the first light source 12 and the second light source 22, i.e., the -Z direction. The stretching mechanism 70 stretches the third solar cell element 1c supported by the conveyor 18 in the Y direction to eliminate deflection of the third solar cell element 1c.

[0110] Figure 7 70. The stretching mechanism 70 includes rotating belts 71, 72 and a hook 75 (see FIG. Figure 9 The third solar cell element 1c has through-holes 5 at its four corners. The through-holes 5 penetrate the third solar cell element 1c in the Z direction. The stretching mechanism 70 engages the hooks 75 with the through-holes 5 to stretch the third solar cell element 1c in the Y direction.

[0111] The rotating belts 71 and 72 are capable of rotating approximately parallel to the XZ plane. The rotating belts 71 and 72 include a first rotating belt 71 and a second rotating belt 72. The first rotating belt 71 is positioned in the +Y direction of the conveyor 18. The second rotating belt 72 is positioned in the -Y direction of the conveyor 18. The rotating belts 71 and 72 are positioned in the -Z direction of the third solar cell element 1c supported by the conveyor 18. Synchronous moving portions are formed at the ends of the rotating belts 71 and 72 in the +Z direction. The synchronous moving portions are capable of moving in the +X direction in synchronization with the conveyor 18. The synchronous moving portions are located within a range encompassing the preparation unit 20 and the evaluation unit 11 in the X direction.

[0112] like Figure 5 As shown, positions A, B, and C are defined. Position A is the position in the -X direction of the preparation unit 20. Position B is the position of the third solar cell element 1c in the evaluation unit 11. Position C is the position in the +X direction of the evaluation unit 11.

[0113] The positions of the synchronously moving parts of the rotating belts 71 and 72 in the Y direction are as follows. Figure 7 As shown, the Y-direction position of the synchronously moving portion of the second rotating belt 72 is fixed. The synchronously moving portion of the first rotating belt 71 tilts in the +Y direction from position A to position B, and tilts in the -Y direction from position B to position C. The Y-direction intervals WA, WB, and WC between the synchronously moving portions of the first rotating belt 71 and the second rotating belt 72 are as follows. The interval WA at position A, the interval WB at position B, and the interval WC at position C satisfy the relationships WB > WA and WB > WC, respectively.

[0114] The Z-direction positions of the synchronously moving portions of the rotating belts 71 and 72 are fixed, but can be tilted as follows. The synchronously moving portions of the rotating belts 71 and 72 are tilted in the +Z direction from position A to position B, and in the -Z direction from position B to position C. The gap between the synchronously moving portions of the rotating belts 71 and 72 and the third solar cell element 1c is narrow at position B and wide at positions A and C.

[0115] Figure 8 yes Figure 7 An enlarged view of part VIII at position A. Figure 9 yes Figure 8 Cross-sectional view at line IX-IX.

[0116] The hooks 75 are fixed to the rotating belts 71 and 72. Multiple hooks 75 are arranged circumferentially around the rotating belts 71 and 72 at the same pitch as the through-holes 5 of the third solar cell element 1c. The hooks 75 are arranged in the +Z direction of the rotating belts 71 and 72 in the synchronously moving portion of the rotating belts 71 and 72. The hooks 75 in the synchronously moving portion of the first rotating belt 71 extend from the first rotating belt 71 in the +Z direction and bend in the +Y direction. The hooks 75 in the synchronously moving portion of the second rotating belt 72 extend from the first rotating belt 71 in the +Z direction and bend in the -Y direction.

[0117] The operation of the performance evaluation device 10 according to the third embodiment will be described.

[0118] exist Figure 5 After evaluating the power generation performance in the evaluation unit 11, the rotating member 60 moves in the +Z direction. The probe 62 in the evaluation unit 11 is separated from the connection pad 15p of the measurement unit 15. The probe 62 in the preparation unit 20 is separated from the connection pad 61p of the resistor 61. Before transporting the third solar cell element 1c, the connection between the third solar cell element 1c and the resistor 61 is disconnected.

[0119] The conveyor 18 and the rotating member 60 also extend in the −X direction of the preparation section 20 . The operator connects the cable 6 of the third solar cell element 1 c located at the A position to the probe 62 of the rotating member 60 .

[0120] like Figure 8 and Figure 9 As shown, the hook 75 of the synchronously moving portion of the rotating belts 71 and 72 enters the through-hole 5 of the third solar cell element 1c at position A. The hook 75 enters the through-hole 5 from the -Z direction of the third solar cell element 1c. Because the top of the hook 75 in the +Z direction is convex, the hook 75 easily enters the through-hole 5. At position A, the hook 75 of the synchronously moving portion of the rotating belts 71 and 72 is located at the center of the through-hole 5 in the Y direction.

[0121] Figure 5 The conveyor 18 shown conveys the third solar cell element 1c in the +X direction. The evaluated third solar cell element 1c exits the evaluation section 11 at position C, while the pre-evaluated third solar cell element 1c enters the evaluation section 11. The third solar cell element 1c at position A enters the preparation section 20. The synchronously moving portion 64 of the rotating member 60 moves in the +X direction in synchronization with the conveyor 18.

[0122] like Figure 7 As shown, the synchronously moving portion of the first rotating belt 71 is inclined in the +Y direction from the A position to the B position.

[0123] Figure 10 yes Figure 7An enlarged view of section X at position B. Figure 11 yes Figure 10 Cross-sectional view taken along line XI-XI of FIG. At position B, the hook 75 of the synchronously moving portion of the rotating belts 71 and 72 protrudes in the +Z direction of the through-hole 5 of the third solar cell element 1c. At position B, the hook 75 of the synchronously moving portion of the first rotating belt 71 moves to the end of the through-hole 5 in the +Y direction. The hook 75 of the synchronously moving portion of the rotating belts 71 and 72 engages with the through-hole 5. The third solar cell element 1c is stretched in the Y direction by the hook 75 of the synchronously moving portion of the rotating belts 71 and 72. Figure 7 In the evaluation section 11 at position B shown, the third solar cell element 1c exhibits no deflection. In the evaluation section 11, the conveyor 18 is able to hold the third solar cell element 1c. In the evaluation section 11, the third solar cell element 1c is adequately illuminated with light. In the preparation section 20 between positions A and B, the third solar cell element 1c is stretched in the Y direction as it is conveyed in the +X direction. In the preparation section 20, the third solar cell element 1c is also adequately illuminated with light.

[0124] like Figure 7 As shown, the synchronously moving portion of the first rotating belt 71 is inclined in the −Y direction from the B position to the C position.

[0125] Figure 12 yes Figure 7 An enlarged view of part XII at position C. Figure 13 yes Figure 12 Cross-sectional view taken along line XIII-XIII. At position C, the hook 75 of the synchronously moving portion of the first rotating belt 71 has moved to the -Y end of the through-hole 5. At position C, the hook 75 of the synchronously moving portion of the rotating belts 71 and 72 has withdrawn from the through-hole 5 of the third solar cell element 1c in the -Z direction. Because the -Y end of the hook 75 is inclined in the -Y direction relative to the -Z direction, the hook 75 easily withdraws from the through-hole 5. The engagement between the hook 75 of the synchronously moving portion of the rotating belts 71 and 72 and the through-hole 5 is released.

[0126] The operator disconnects the cable 6 of the third solar cell element 1c located at the C position from the probe 62 of the rotating member 60. The third solar cell element 1c after evaluation is taken out from the performance evaluation apparatus 10.

[0127] The rotating member 60 moves in the -Z direction. The probe 62 of the evaluation unit 11 contacts the connection pad 15p of the measurement unit 15. The probe 62 of the preparation unit 20 contacts the connection pad 61p of the resistor 61. After the third solar cell element 1c is conveyed, the third solar cell element 1c and the resistor 61 are connected. A third solar cell element 1c adjacent to the third solar cell element 1c in the -X direction, which was disconnected from the resistor 61 before the third solar cell element 1c was conveyed, is connected to the resistor 61 after the third solar cell element 1c is conveyed. The resistor 61 is sequentially connected to the plurality of third solar cell elements 1c.

[0128] As described in detail above, the solar cell element performance evaluation apparatus 10 in the third embodiment further includes an annular rotating member 60. The rotating member 60 includes a synchronously movable portion 64 that is movable in synchronization with the conveyor 18. The rotating member 60 holds a probe 62 that is capable of connecting the cable 6 extending from the third solar cell element 1c to the resistor 61. The rotating member 60 is movable in the Z direction intersecting the surface of the connection pads 61p of the resistor 61.

[0129] Resistors 61 are sequentially connected to the plurality of third solar cell elements 1c by the cooperation of the rotating member 60 and the conveyor device 18. The number of resistors 61 matches the number of third solar cell elements 1c contained in the preparation unit 20. Since only a small number of resistors 61 are required, the cost of the performance evaluation device 10 is reduced.

[0130] The probe 62 can connect the cable 6 extending from the third solar cell element 1 c and the measuring unit 15 of the evaluation unit 11 .

[0131] The third solar cell element 1c can be sequentially connected to the resistor 61 of the preparation unit 20 and the measuring unit 15 of the evaluation unit 11 while the cable 6 extending from the third solar cell element 1c is connected to the probe 62. The evaluation time of the performance evaluation device 10 is shortened.

[0132] The performance evaluation apparatus 10 further includes a stretching mechanism 70. The stretching mechanism 70 stretches the third solar cell element 1c in the Y direction intersecting the light irradiation direction of the first light source 12 and the second light source 22, that is, the -Z direction.

[0133] The third solar cell element 1c is free from deflection. The third solar cell element 1c can be attracted by the conveyor 18. The third solar cell element 1c is sufficiently irradiated with light.

[0134] The solar cell elements 1 are not limited to the first solar cell element 1 a , the second solar cell element 1 b , and the third solar cell element 1 c . If resistors can be connected to the solar cell elements 1 in the preparation unit 20 , the performance evaluation apparatus 10 can handle all solar cell elements 1 .

[0135] According to at least one embodiment described above, the preparation unit 20 for irradiating light onto the solar cell element 1 before evaluating the power generation performance of the solar cell element 1 including the perovskite semiconductor can shorten the evaluation time of the performance evaluation device 10 .

[0136] Furthermore, in each embodiment, the solar cell element has been described as having a two-terminal structure, but may also be a three-terminal type with GND sandwiched therebetween or a four-terminal type having two pairs of positive and negative electrodes.

[0137] While several embodiments of the present invention have been described, these embodiments are provided as examples and are not intended to limit the scope of the invention. These embodiments may be implemented in various other ways, and various omissions, substitutions, and modifications may be made without departing from the spirit of the invention. These embodiments and their variations are intended to be within the scope and spirit of the invention, and are also intended to be within the scope of the invention set forth in the claims and their equivalents.

[0138] [Explanation of Reference Numerals]

[0139] 1…solar cell element, 2…terminal, 3…cable, 10…performance evaluation device, 11…evaluation unit, 12…first light source, 15p…connection pad, 18…conveying device, 20…preparation unit, 22…second light source, 30…support component, 31, 41, 51, 61…resistor, 32, 42, 52, 62…probe, 50, 60…rotating component, 61p…connection pad, 54, 64…synchronous moving portion, 70…stretching mechanism.

Claims

1. A performance evaluation device for a solar cell element, comprising: an evaluation unit including a first light source for irradiating light onto a solar cell element including a perovskite semiconductor, and evaluating power generation performance of the solar cell element; and The preparation unit includes a second light source for irradiating light to the solar cell element before being transported to the evaluation unit, and prepares for evaluation of power generation performance of the solar cell element.

2. The solar cell element performance evaluation device according to claim 1, wherein: The preparation unit includes a resistor connected to the solar cell element to form a closed circuit.

3. The performance evaluation device for a solar cell element according to claim 2, wherein: A conveying device is provided, the conveying device extending in a first direction from the preparation section toward the evaluation section, supporting the solar cell elements side by side, and conveying the solar cell elements sequentially to the evaluation section.

4. The performance evaluation device for a solar cell element according to claim 3, wherein: Before the solar cell element is transported, the connection between the solar cell element and the resistor is released. The solar cell element adjacent to the solar cell element on the upstream side of the first direction from which the connection with the resistor is released is connected to the resistor after the solar cell element is conveyed.

5. The performance evaluation device for a solar cell element according to claim 4, wherein: The preparation unit includes: the resistor; and a probe capable of connecting the resistor to the solar cell element, The probe is movable in a direction intersecting with a surface of the terminal of the solar cell element.

6. The performance evaluation device for a solar cell element according to claim 3, wherein: The resistor moves in synchronization with the solar cell element while being connected to the solar cell element.

7. The solar cell element performance evaluation device according to claim 6, wherein: The invention also includes an annular rotating member including a portion that can move synchronously with the conveying device.

8. The solar cell element performance evaluation device according to claim 7, wherein: The rotating member holds the resistor and a probe capable of connecting the resistor to the solar cell element. The rotating member is movable in a direction intersecting with a surface of the terminal of the solar cell element.

9. The solar cell element performance evaluation device according to claim 4, wherein: It also has an annular rotating member, which includes a portion that can move synchronously with the conveying device, The rotating member holds a probe capable of connecting a cable extending from the solar cell element to the resistor. The rotating member is movable in a direction intersecting with a surface of the connection pad of the resistor.

10. The solar cell element performance evaluation device according to claim 9, wherein: The probe can connect a cable extending from the solar cell element to the connection pad of the evaluation unit.

11. The solar cell element performance evaluation device according to claim 9, wherein: The device further includes a stretching mechanism that stretches the solar cell element in a direction intersecting with the light irradiation direction of the first light source and the second light source.

12. The solar cell element performance evaluation device according to any one of claims 1 to 11, wherein: The second light source is an LED.

13. A method for evaluating the performance of a solar cell element, comprising: a preparation step of irradiating light onto a solar cell element including a perovskite semiconductor before evaluating the power generation performance of the solar cell element; and The evaluation step is to evaluate the power generation performance of the solar cell element.

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