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Method for improving performances and thermostability of perovskite solar cell module

A technology for solar cell components and perovskite cells, which is applied in the field of improving the performance and thermal stability of perovskite solar cell components, and can solve the problem of inability to replicate the photoelectric conversion efficiency of small-area cells, reduce the photoelectric conversion performance and stability of cells, and prevent calcium Problems such as the increase of internal defects in the titanium ore structure, etc., achieve high output power, increase power output, and increase output power

Inactive Publication Date: 2019-09-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the latest certified efficiency of perovskite cells has reached 22.1%, they are all based on small-area devices (≤1cm 2 ), and perovskite solar cells are more sensitive to temperature changes. When the temperature is higher than 45°C, the perovskite structure will change from a tetragonal phase to a cubic phase, and the internal defects of the cubic phase perovskite structure will increase, resulting in The diffusion length of its carriers is reduced, thereby reducing the photoelectric conversion performance and stability of the battery
Therefore, the current important bottleneck restricting perovskite cells from entering the commercial market is that large-area perovskite cell components cannot replicate the photoelectric conversion efficiency and photothermal stability of small-area cells.
[0004] Although many scientists use new thermally stable transport layer materials and inorganic perovskite materials to improve their own thermal stability, the final photoelectric conversion efficiency is not ideal. Here we propose to introduce thermoelectric devices to prepare large-area Coupling components of perovskite solar cell modules / large-area thermoelectric modules

Method used

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  • Method for improving performances and thermostability of perovskite solar cell module
  • Method for improving performances and thermostability of perovskite solar cell module
  • Method for improving performances and thermostability of perovskite solar cell module

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Experimental program
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Effect test

Embodiment 1

[0033] Preparation of large-area perovskite cells (NanoLett., 2014, 14, 2591-2596.): Three laser etching processes (see figure 2 ), first place the FTO substrate (4*4cm 2 ) use the first laser P1 to etch the surface of the substrate, form the required pattern with the surface of the substrate, and divide the substrate into several unconnected sub-cells through the pattern; magnetron sputtering 50nm thick TiO 2 Electron transport layer; 300nm thick large-area methylamino lead iodide perovskite film was prepared by vacuum evaporation and direct contact reaction method; spin-coated 200nm thick hole transport layer Spiro-OMeTAD, followed by the first laser on it The corresponding pattern laser P2 is etched; secondly, the metal is evaporated to ensure that the metal top electrode of the second sub-cell and the FTO bottom electrode of the first sub-cell are in contact with each other when the metal electrode is evaporated, and so on, the nth sub-cell The metal top electrode and th...

Embodiment 2

[0038] Prepare large-area (4*4cm) according to embodiment 1 2 ) perovskite solar cell assembly method to prepare six sub-cells with equal effective area. The assembly structure of the large-area perovskite solar cell prepared by combining series and parallel (3s2p), the effective area of ​​the sub-cell is 7.56cm 2 Carry out I-V test to this type of battery, the output current of device is 35.69mA, open circuit voltage 2.9V, fill factor is 47%, and maximum output power reaches 48.94mW; Prepare thermoelectric power generation device according to embodiment 1, it is according to Figure 5 The connection mode shown in series, that is, the negative electrode of the solar cell and the positive electrode of the thermoelectric power generation device are connected to each other to prepare a coupling device. The short-circuit current of the final coupling device is 40.27mA, the open circuit voltage is 3.48V, the fill factor is 43%, and the maximum output power reaches 60.64mW, the outp...

Embodiment 3

[0040] The connection mode of the perovskite cell module (PSM) and the thermoelectric generator module (TEG) can be connected in series or in parallel, according to the characteristics of the series-parallel circuit: when the perovskite cell module and the thermoelectric module are connected in series, the final output open voltage is the sun The sum of the output open voltages of the battery and the thermoelectric module; when the solar cell and the thermoelectric power generation device are connected in parallel, the coupled current is the sum of the output current of the solar cell and the thermoelectric module. As a guide for experiments, under the premise of knowing the performance of perovskite battery components and thermoelectric power generation devices, we develop a simulation estimation method to find the optimal connection method to obtain the maximum power output.

[0041] Prepare large-area (4*4cm) according to embodiment 1 2 ) perovskite solar cell components an...

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Abstract

The invention relates to a method for coupling a large-area perovskite solar cell module with a thermoelectric power generation device module which is not smaller than the area of a cell. According to the method, the thermoelectric power generation device module and the large-area perovskite solar cell module are connected in series or in parallel and overlapped to form a composite module. The method has the advantages that: 1) the utilization efficiency of light energy and heat energy in solar energy can be improved, namely, the perovskite solar cell module mainly utilizes ultraviolet and visible light wave bands, the thermoelectric generation device mainly utilizes infrared light (heat energy) and waste heat generated by self photoelectric conversion and thermal ionization of the solar cell, so that the power output of the module is improved, and the maximum output power of the composite module is improved by 24 percent compared with that of a single solar cell module; 2) the thermoelectric module can timely take away the waste heat generated due to long-time illumination of the solar battery and working, so that the solar battery module keeps a constant temperature, the service life of the solar battery module is prolonged, and higher and more stable output power is obtained.

Description

technical field [0001] The invention relates to the technical field of improving the performance and thermal stability of large-area perovskite solar cell components, specifically a method for improving the performance and thermal stability of perovskite solar cell components, using large-area perovskite solar cells The composite component prepared by coupling the component with a thermoelectric device module with an area not smaller than the battery area can not only broaden the absorption and utilization of the solar spectrum, improve the efficiency of the perovskite solar cell; The generated waste heat prolongs the service life of the perovskite battery components, resulting in higher and more stable output power. Background technique [0002] Solar energy utilization mainly includes light energy and thermal energy. Large-area solar cell components can receive ultraviolet and visible light in solar radiation. Long-wave infrared light cannot be effectively utilized, and al...

Claims

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Application Information

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IPC IPC(8): H02S40/42H02S40/44
CPCH02S40/42H02S40/44Y02E10/50Y02E10/60
Inventor 李灿郭鑫傅平秦炜
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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