Method for preparing polymer thin-film solar cell active layer through electrospinning

Abstract

The invention relates to a solar cell, and provides a method for preparing a polymer thin-film solar cell active layer through electrospinning, wherein by means of the method, full-spray-printing preparation of a donor material layer, a blending layer and an acceptor material layer can be completely at the same time. The method includes the first step of preparing an electrostatic spinning active layer solution, the second step of conducting lap joint on an electrospinning device and conducting preparation before entering a laboratory, the third step of preparing the donor material layer through electrostatic spraying, the fourth step of preparing a nanometer mesh-shaped porous structure of the blending layer through electrospinning, and the fifth step of preparing the blending layer and the acceptor material layer through electrostatic spraying. When the polymer thin-film solar cell active layer is prepared through the electrospinning technology, experimental equipment is simple, operation is convenient, material applicability is high, a prepared nanofiber membrane is high in specific surface area and is of a nanometer mesh-shaped porous structure, high mechanical strength is achieved, the contact area between a donor and an acceptor is greatly enlarged, and safety and circulating performance of the cell are improved.

Description

technical field [0001] The invention relates to a solar cell, in particular to a method for preparing an active layer of a polymer thin film solar cell by electrospinning. Background technique [0002] Due to its potential price advantage, potential high energy conversion efficiency (currently more than 8%) and the advantages of being able to fabricate large-area flexible devices, polymer solar cells have become a research hotspot for many international research institutions and companies in recent years. Polymer solar cells have the advantages of being prepared on flexible substrates, light weight, small self-discharge, and no memory effect, which are not available in traditional inorganic crystalline silicon solar cells (Li Gang, Zhu Rui, Yang Yang. Polymer solar cells.[J]Nature Photonics,2012,6(3):153-161). [0003] The structure of the polymer thin film solar cell includes: anode, anode interface layer, active layer film, cathode interface layer, cathode. Among them, t...

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Problems solved by technology

而文献《Fabrication of ordered bulk heterojunction organic photovoltaic cells using nanopatterning and electrohydrodynamic spray deposition methods》(Sung-Eun Park,Sehwan Kim,Kangmin Kim.Fabrication of ordered bulk heterojunction organic photovoltaic cells using nanopatterning and electrohydrodynamic spray deposition methods.[J] Nanoscale, 2012, 4: 7773-7779) uses imprinting technology to obtain the zigzag blended layer structure, although the contact area between the active layer and the receptor is improved, but the performance of the battery is limited; Chinese patent 201010241963.2 proposes electrostatic spraying Spherical particles were obtained to embed the loaded material, but the material (donor part) carried by the blend layer was still an interpenetrating network structure made by mechanical processing, resulting in insufficient adhesion strength of the donor material after contact with the spherical particles obtained by electrostatic spraying. Due to the volume change accompanying the charging and discharging process of the battery, the active material (spherical particles) is easy to fall off from the donor material, and the structure is gradually destroyed

Chinese patent 200910043369.X proposes a method for preparing a polymer electrolyte membrane with a micro-nano porous structure, but requires micro-nano technologies such as spin coating, electrostatic spraying, spraying, and brushing. The process is complicated and the investment in equipment is extremely high.

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