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Perovskite solar cell and preparation method thereof

A solar cell and perovskite-type technology, applied in the field of solar cells, can solve the problems of reducing battery performance, insufficient uniformity and density of the film, and increasing electronic recombination

Inactive Publication Date: 2014-10-08
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 It is widely used in new solar cells, but as a dense layer of perovskite solar cells, its conductivity is limited; the electron transport rate of ZnO is faster than that of TiO 2 2-3 orders of magnitude higher, but the contact interface with perovskite structure materials is poor, and many recombination centers will appear
In addition, there are many trapped states on the surface of nanoparticles that hinder electron transport, and a large number of grain boundaries may also increase the probability of electron recombination, thereby reducing the performance of the battery.
As far as the preparation technology of dense layer thin film is concerned, the preparation process by chemical method (such as wet chemical or electrochemical deposition method, etc.) is simple and the cost is low, but the reaction process is not easy to control, the obtained film is not uniform and dense, and there are relatively small particles on the surface of nanoparticles. There are many defect states and grain boundaries; as reported in the literature, a dense layer of titanium dioxide is obtained by spraying and cracking diisopropyl titanate solution in an oxygen atmosphere, and the photoelectric conversion efficiency of the assembled perovskite solar cell exceeds 15%, but the spray cracking process has strict requirements on oxygen atmosphere and spray speed control
The structure of the dense layer film obtained by physical methods (such as laser pulse, magnetron sputtering, etc.) is better, but the production cost is too high and the process is complicated, which is not conducive to industrial production

Method used

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Examples

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Effect test

Embodiment 1

[0100] Example 1: Preparation of perovskite solar cells

[0101] The implementation steps of this embodiment are as follows:

[0102] A. FTO glass substrate pretreatment

[0103] Use an ultrasonic cleaning machine sold by Kunshan Ultrasonic Instrument Co., Ltd. under the trade name KQ-250E ultrasonic cleaner for ultrasonic cleaning. The surface of the FTO glass is ultrasonically cleaned with deionized water, acetone and alcohol, and then decompressed using a nitrogen cylinder. The self-made connecting device at the outlet of the valve is blown dry with nitrogen, and then uses the ultraviolet light and ozone cleaning machine sold by Novascan Company of the United States under the trade name PSD-UV4 ultraviolet ozone cleaning instrument to perform ultraviolet light and ozone cleaning;

[0104] B. Preparation of Sandwich TiO 2 / ZnO / TiO 2 dense layer

[0105] (i) Preparation of TiO 2 layer

[0106] Use the spin coater sold by the Institute of Microelectronics, Chinese Academ...

Embodiment 2

[0118] Embodiment 2: Preparation of perovskite solar cell

[0119] The implementation steps of this embodiment are as follows:

[0120] A. FTO glass substrate pretreatment

[0121] Using an ultrasonic cleaning machine sold by Kunshan Ultrasonic Instrument Co., Ltd. under the trade name KQ-250E ultrasonic cleaner, the FTO glass surface is ultrasonically cleaned with deionized water, acetone and alcohol, and then the outlet of the pressure reducing valve on the nitrogen cylinder is used to clean the surface of the FTO glass. The self-made connection device is blown dry with nitrogen, and then the ultraviolet light ozone cleaning machine sold by American Novascan Company under the trade name PSD-UV4 type ultraviolet ozone cleaning instrument is used for ultraviolet light ozone cleaning;

[0122] B. Preparation of Sandwich TiO 2 / ZnO / TiO 2 dense layer

[0123] (i) Preparation of TiO 2 layer

[0124] Use the spin coater sold by the Institute of Microelectronics, Chinese Acade...

Embodiment 3

[0136] Embodiment 3: Preparation of perovskite solar cell

[0137] The implementation steps of this embodiment are as follows:

[0138] A. FTO glass substrate pretreatment

[0139] Using an ultrasonic cleaner sold by Kunshan Ultrasonic Instrument Co., Ltd. under the trade name KQ-250E ultrasonic cleaner, the surface of the FTO glass was ultrasonically cleaned with deionized water, acetone and alcohol, and then cleaned with a nitrogen cylinder Dry the self-made connection device at the outlet of the upper pressure reducing valve with nitrogen, and then use the ultraviolet light ozone cleaning machine sold by Novascan Company of the United States under the trade name PSD-UV4 ultraviolet ozone cleaning instrument for ultraviolet light ozone cleaning;

[0140] B. Preparation of Sandwich TiO 2 / ZnO / TiO 2 dense layer

[0141] (i) Preparation of TiO 2 layer

[0142] Use the spin coater sold by the Institute of Microelectronics, Chinese Academy of Sciences under the trade name K...

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Abstract

The invention relates to a perovskite solar cell and a preparation method thereof. The perovskite solar cell is composed of an FTO glass substrate, a sandwich structure TiO2 / ZnO / TiO2 compact layer, a TiO2 mesoporous / perovskite structure material active light absorption layer, a spiro-OMeTAD hole transferring layer and a gold electrode. Compared with the prior art, the sandwich structure TiO2 / ZnO / TiO2 compact layer combines with the advantages and disadvantages of TiO2 and ZnO, so that fill factors of the perovskite solar cell are improved to 70%, and the photoelectric conversion efficiency reaches 12.6%. Equipment for preparing the perovskite solar cell is simple, the preparing process is simple, control is easy, the cost is low, and the perovskite solar cell has a very good industrial application prospect.

Description

【Technical field】 [0001] The invention belongs to the technical field of solar cells. More specifically, the present invention relates to a perovskite solar cell and a method for preparing the perovskite solar cell. 【Background technique】 [0002] Perovskite solar cells are a new type of solar cells. Organic-metal halide light-absorbing materials with a perovskite structure have excellent light absorption, photoelectric conversion characteristics, and excellent photogenerated carrier transport characteristics. Therefore, perovskite solar cells using this new type of photoelectric conversion material exhibit particularly excellent photoelectric conversion efficiency. At present, the photoelectric conversion efficiency of perovskite solar cell laboratory samples has reached 16.7%, and its theoretical conversion efficiency can reach up to 50%, which is twice the conversion efficiency of solar cells currently on the market, which can greatly reduce the use of solar cells cost,...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCY02E10/549H10K71/12H10K30/152H10K85/50H10K30/50H10K30/151
Inventor 段金霞王浩张军
Owner HUBEI UNIV
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