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Efficient plane perovskite solar energy cell preparation method based on low temperature lithium ion doping with titanium dioxide compact layer

A technology of solar cells and titanium dioxide, applied in circuits, electrical components, electric solid devices, etc., can solve the problems of complex preparation process and achieve the effects of simple preparation process, promotion of conduction and collection, and simple operation

Active Publication Date: 2017-10-10
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the highest photoelectric conversion efficiency reported by this system is only 15.1%, which is still far from the 22% of pure halogen-based perovskite cells, and needs to be further improved.
At the same time, its preparation process needs to be sintered at a high temperature of 500 ° C to form porous TiO 2 Membranes, the preparation process is more complex

Method used

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Examples

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preparation example Construction

[0035] A method for preparing a high-efficiency planar perovskite solar cell based on a low-temperature lithium-ion-doped titanium dioxide dense layer of the present invention comprises the following steps:

[0036] S1: Hydrolysis of titanium tetrachloride solution to obtain TiO 2 colloid; the TiO 2 The colloid is obtained by preparing a titanium tetrachloride solution with a concentration of 150-250mM in an ice-water mixture;

[0037] S2: Preparation of lithium ion doped TiO 2 Dense layer: After irradiating the clean FTO conductive glass with a UV lamp for 10-20 minutes, put it into TiO at a temperature of 65-75°C 2 Soak in the colloidal solution for 45-55min, take it out and wash it with deionized water and ethanol respectively, and at a concentration of 5×10 -5 ~5×10 -3 Soak in mol / L lithium silicate aqueous solution for 2 minutes; after heat treatment at 180-200°C for 30-60 minutes, lithium-ion-doped TiO can be obtained 2 Dense layer;

[0038] S3: TiO produced in ste...

Embodiment 1

[0069] A low-temperature lithium-ion-doped titania dense layer based on CH prepared in air in this embodiment 3 NH 3 PB 3-x (SCN) x A method for preparing a high-efficiency planar perovskite solar cell, comprising the steps of:

[0070] S1: Add 5ml of titanium tetrachloride solution to 200ml of ice-water mixture to make TiO 2 colloid;

[0071] S2: Preparation of lithium ion doped TiO 2 Dense layer: After irradiating the clean FTO conductive glass with a UV lamp for 15 minutes, put it into TiO at a temperature of 70°C 2 Soak in the colloidal solution for 50min, take it out and wash it with deionized water and ethanol respectively, at a concentration of 5×10 -5 Soak in mol / L lithium silicate aqueous solution for 2 minutes; after heat treatment at 200°C for 30 minutes, lithium ion-doped TiO can be obtained 2 Dense layer;

[0072] S3: Preparation of perovskite layer in humid air: Pb(SCN) 2 Dissolved in methyl sulfoxide, configured into a solution with a concentration of 0...

Embodiment 2

[0077] A low-temperature lithium-ion-doped titania dense layer based on CH prepared in air in this embodiment 3 NH 3 PB 3-x (SCN) x A method for preparing a high-efficiency planar perovskite solar cell, comprising the steps of:

[0078] S1: Add 5ml of titanium tetrachloride solution to 200ml of ice-water mixture to make TiO 2 colloid;

[0079] S2: Preparation of lithium ion doped TiO 2 Dense layer: After irradiating the clean FTO conductive glass with a UV lamp for 15 minutes, put it into TiO at a temperature of 70°C 2 Soak in the colloidal solution for 50min, take it out and wash it with deionized water and ethanol respectively, at a concentration of 5×10 -4 Soak in mol / L lithium silicate aqueous solution for 2 minutes; after heat treatment at 200°C for 30 minutes, lithium ion-doped TiO can be obtained 2 Dense layer;

[0080] S3: Preparation of perovskite layer in humid air: Pb(SCN) 2 Dissolved in methyl sulfoxide, configured into a solution with a concentration of 0...

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Abstract

The invention discloses an efficient plane perovskite solar energy cell preparation method based on low temperature lithium ion doping with a titanium dioxide compact layer; the method comprises the following steps: hydrolyzing a titanium tetrachloride solution so as to obtain a TiO2 colloid; depositing the titanium tetrachloride hydrolyzed colloid on a FTO conductive glass so as to form a TiO2 compact layer film; using a lithium silicate solution to process the TiO2 compact layer film, and forming a CH3NH3PbI3-x(SCN)x layer or a CH3NH3PbI3 layer on the compact layer film; spin coating a cavity conducting layer on a perovskite layer, and heat vapor plating to form an Ag electrode, thus obtaining the perovskite cell. Compared with a CH3NH3PbI3-x(SCN)x and CH3NH3PbI3 perovskite cell with no doped lithium ions, the method dopes lithium ions with the TiO2 compact layer, thus promoting electron conduction and collection, and further improving the perovskite cell photoelectric conversion efficiency; the method needs no extra equipment and complex process, and is simple to operate.

Description

technical field [0001] The invention relates to the field of preparation of stable and high-efficiency perovskite solar cells, in particular to a method for preparing high-efficiency planar perovskite solar cells based on low-temperature lithium-ion-doped titanium dioxide dense layers. Background technique [0002] In recent years, perovskite solar cells have attracted much attention due to their high photoelectric conversion efficiency. Currently, the highest conversion efficiency of perovskite cells certified by NREL in the United States has exceeded 22%. However, CH 3 NH 3 wxya 3 The (halogen) perovskite layer has poor stability in humid air and needs to be prepared in an inert gas environment with low humidity, and the inert gas glove box is expensive. And if perovskite solar cells can be prepared directly in humid air, not only can the cost of the battery be reduced, but also the operation is convenient during the preparation process. [0003] Thiocyanate (SCN) is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/00H10K30/20H10K2102/00Y02E10/549
Inventor 吴素娟刘慧张宗宝陆旭兵刘俊明
Owner SOUTH CHINA NORMAL UNIVERSITY
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