Flexible solar cell

A solar cell and flexible technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of low qualification rate and poor photoelectric conversion efficiency of flexible solar cells, achieve less loss of photoelectric conversion efficiency, improve yield, and save manufacturing Effects of Cost and Manufacturing Time

Active Publication Date: 2016-12-07
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a flexible solar cell, the purpose of which is to optimize the structure of the prior art solar cell, thereby solving the problem of the low yield of large-area flexible solar cells prepared by the prior art, and the photoelectric Technical problems with poor conversion efficiency

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preparation example Construction

[0045] The method for preparing the above-mentioned flexible solar cell is prepared sequentially in the order of a reflective metal layer, a multi-layer photoactive layer, a transparent conductive layer and a metal grid, when the flexible solar cell includes a hole blocking layer and / or an electron blocking layer , then add preparation steps between the corresponding steps;

[0046] Among them, the preparation method of photoactive layer, intermediate layer, electron blocking layer, hole blocking layer and transparent conductive layer can be prepared by coating method, while reflective metal layer and metal grid can be prepared by magnetron sputtering, vacuum thermal evaporation or nanometer Particle spray preparation.

Embodiment 1

[0066] The area of ​​the solar cell of embodiment 1 is 10cm 2 , including: polyethersulfone film as a flexible substrate, 80nm to 100nm silver as a reflective metal layer, 5nm PEI (polyetherimide) as a hole blocking layer, and 180nm first active layer (including P3HT and ICBA with a mass ratio of 1:1, the middle layer (composed of 1mm PEDOT:PSS and 5nm PEI in sequence from the bottom to the top surface), 80nm second active layer (PTB7-Th:PC 71 BM), 120nm PEDOT:PSS as transparent conductive layer and 80nm silver metal grid, such as figure 1 Shown; The preparation method of this solar cell comprises the following steps:

[0067]S1. Cut out a polyethersulfone film with a side length of 5 cm, cover it with tape, and vacuum evaporate to obtain a silver electrode with a side length of 4 cm in the central area, with a thickness of 80 nm to 100 nm. One side of the silver electrode is additionally vapor-deposited to the edge of the flexible substrate for easy contact testing. Spin-c...

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Abstract

The invention discloses a flexible solar cell, which sequentially comprises a flexible substrate, a reflective metal layer, multiple photoactive layers, a transparent conductive layer and a metal mesh from the bottom surface to the top surface, wherein the reflective metal layer is used for reflecting incident light to improve the light energy absorption rate of the flexible solar cell, and meanwhile, the reflective metal layer serves as a cathode of the flexible solar cell; the multiple photoactive layers are used for converting light energy into a current carrier and further converting the current carrier into electric energy; the transparent conductive layer is used for serving as an anode of the flexible solar cell; and the metal mesh is used for collecting charges of the transparent conductive layer to enhance the conductivity of the transparent conductive layer. According to the flexible solar cell provided by the invention, the structure of the flexible solar cell in the prior art is optimized; and the technical problems that the prepared large-area flexible solar cell is low in yield and poor in photoelectric conversion efficiency are solved.

Description

technical field [0001] The invention belongs to the field of large-area flexible photovoltaic device preparation, and more specifically relates to a flexible solar cell. Background technique [0002] Solar energy is the most reliable clean resource for human beings in the future. It is inexhaustible and inexhaustible. In the case of shortage of resources, the development and research of solar energy is particularly urgent. [0003] Organic solar cells can be prepared by solution method, and organic semiconductor materials are made into thin-film cells on flexible substrates by simple methods such as spin coating, spray coating, and doctor blade coating. Through the research progress of Alan J. Heeger, Frederik C. Krebs, Cao Yong and Yang Yang on material synthesis and device physics in the past two decades, the photoelectric conversion efficiency of organic solar cells prepared in the laboratory has exceeded 10%. However, these organic solar cell devices with high photoele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/00
CPCH10K77/111H10K30/211H10K30/83H10K30/87Y02E10/549
Inventor 周印华毛霖童金辉覃飞蒋方圆熊思醒孟伟蒋友宇
Owner HUAZHONG UNIV OF SCI & TECH
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