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Thin-film solar cell based on layered perovskite structure material and preparation method thereof

A technology of solar cells and perovskite materials, applied in the field of solar cells, can solve problems such as poor stability of light absorbing layer materials, and achieve the effects of reducing preparation costs, reducing contacts, and good energy level matching

Inactive Publication Date: 2017-03-29
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a thin-film solar cell based on a layered perovskite structure material and its preparation method, thereby solving the problem of poor stability of the light-absorbing layer material in the prior art in the air

Method used

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preparation example Construction

[0019] According to the preparation method of the thin film solar cell of the present invention, the layered perovskite material (C 2 h 9 N 2 )(CH 3 NH 3 ) 2 Pb 3 I 10 The preparation, the specific process is as follows:

[0020] 1. Synthesis (C 2 h 9 N 2 )I 2 : Under the condition of 0°C water bath, use a pipette to slowly drop 57wt.% hydroiodic acid aqueous solution into 99wt.% ethylenediamine, wherein the molar ratio of hydroiodic acid to ethylenediamine is 1:0.6-0.8, Stir magnetically for 6 hours, and rotate the mixed solution at 80-90°C for 0.2-1h. After the liquid is evaporated to dryness, cool to room temperature and filter with suction to obtain yellow-white crystals. Place the white crystals in a normal room at 40-80°C Empty oven is carried out vacuum drying 3-6h, finally obtains (C 2 h 9 N 2 ) I 2 crystals.

[0021] CH 3 NH 3 I and PbI 2 All were purchased from Shanghai Maxway Technology Co., Ltd.

[0022] 2. Synthesis (C 2 h 9 N 2 )(CH 3 NH ...

Embodiment 1

[0029] A method for preparing a thin-film solar cell based on a layered perovskite structure material, comprising the steps of:

[0030] Step S1: Provide a substrate: ultrasonically clean indium tin oxide conductive glass (ITO) with acetone, ethanol, and deionized water in sequence, and then treat with ultraviolet and ozone. The power of ultrasonic cleaning is 30W, the frequency is 40KHZ, and the cleaning time is 20min; UV ozone treatment time is 30min, to obtain clean indium tin oxide conductive glass (ITO);

[0031] Step S2, forming a hole transport layer on the substrate obtained in S1: Spin-coat the prepared PEDOT:PSS precursor solution onto indium tin oxide conductive glass (ITO) at a speed of 5000r / s for 20s, and then , annealing at 500°C for 1 hour to form a hole transport layer;

[0032] Step S3, forming a layered perovskite light absorbing layer above the hole transport layer obtained in S2: the layered perovskite structure material (C 2 h 9 N 2 )(CH 3 NH 3 ) 2...

Embodiment 2

[0037] A method for preparing a thin-film solar cell based on a layered perovskite structure material, comprising the steps of:

[0038] Step S1: Provide a substrate: ultrasonically clean indium tin oxide conductive glass (ITO) with acetone, ethanol, and deionized water in sequence, and then treat with ultraviolet and ozone. The power of ultrasonic cleaning is 30W, the frequency is 40KHZ, and the cleaning time is 30min; ultraviolet ozone treatment time is 60min, to obtain clean indium tin oxide conductive glass (ITO);

[0039] Step S2, forming a hole transport layer on the substrate obtained in S1: Spin-coat the prepared PEDOT:PSS precursor solution onto indium tin oxide conductive glass (ITO) at a speed of 5000r / s for 20s, and then , annealing at 500°C for 1 hour to form a hole transport layer;

[0040] Step S3, forming a layered perovskite light absorbing layer above the hole transport layer obtained in S2: the layered perovskite structure material (C 2 h 9 N 2 )(NH 2 C...

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Abstract

The invention provides a thin-film solar cell based on a layered perovskite structure material. The thin-film solar cell comprises a substrate, a hole transmission layer, a light absorbing layer, an electronic transmission layer and an electrode connected in order, wherein the substrate is indium tin oxide conductive glass; the hole transmission layer is poly 3,4-ethylenedioxy thiophene / polystyrene sulfonate; the light absorbing layer is a layered perovskite structure material (C2H9N2)(CH3NH3)2Pb3I10 or (C2H9N2)(NH2CH=NH2)2Pb3I10; the electronic transmission layer is fullerene derivatives; and the electrode is an aluminum thin-film. The invention further provides a preparation method of the thin-film solar cell based on the layered perovskite structure material. The thin-film solar cell adopts the layered perovskite structure material as the light absorbing layer so as to improve the stability of the thin-film solar cell.

Description

technical field [0001] The invention relates to a solar cell, and more particularly to a thin-film solar cell based on a layered perovskite structure material and a preparation method thereof. Background technique [0002] Solar energy is the most important source of human energy on the earth's surface. Since the formation speed of ore energy is much lower than its mining speed, mining difficulty and cost are getting higher and higher. The energy return rate of ore energy, that is, the ratio of the amount of energy obtained through energy mining to the amount of energy consumed in the mining process, has long-term Since then, it has been on a downward trend, and as the rate of return declines further, it will not make economic sense to mine ore energy. It is predicted that with the current growth rate of energy consumption, by 2050 and 2100, the global energy consumption will only be provided by solar power generation. With the gradual maturity of solar technology, the unit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/48
CPCH10K71/12H10K85/30Y02E10/549Y02P70/50
Inventor 杨铁莹姜文龙高兴宇文闻谭力王海丽
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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