Electronic transmission layer for inverted polymer solar cell and application thereof

Abstract

The invention belongs to the new energy field and relates to the solar cell technical field. Specifically, the invention relates to an electronic transmission layer for an inverted polymer solar cell and an application thereof. The electronic transmission layer preparing method comprises the following steps of (1) preparing an AZO precursor solution; (2) and preparing an AZO film. The AZO film is prepared in the following steps that the precursor solution is dropped on an ITO glass substrate for spin coating; the ITO glass substrate carrying the precursor solution is placed and heated on a hot plate with a temperature ranging from 100 DEG C to 200 DEG C for 5-10 minutes for pre-annealing; then the temperature of the hot plate is adjusted to 240 DEG C to 300 DEG C for post-annealing for 5-30 minutes; after the annealing process is finished, the AZO film is acquired. After being cooled, the AZO film is placed in a glass dish containing an ethyl alcohol solution. Ultrasonic processing is performed on the AZO film for 3-10 minutes. Then deionized water is used for flushing the film which is further dried by nitrogen. An electronic transmission layer for the inverted polymer solar cell is thus acquired.

Description

technical field [0001] The invention belongs to the technical field of solar cells in new energy sources, and relates to an electron transport layer for an inverted structure polymer solar cell and an application thereof. Background technique [0002] In recent years, Inverted polymer solar cells (Inverted polymer solar cells, IPSCs), due to the use of electron transport layer materials to replace the PEDOT:PSS materials in traditional organic batteries, and the use of high work function metals as anodes, the performance of the battery has been significantly improved [See Z.He, C.Zhong, S.Su, M.Xu, H.Wu, YongCao, Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure, Nature Photon., 2012, 6, 593-597]. ZnO electron transport layer, due to its non-toxicity, low price, excellent stability, high electron mobility and high transmission characteristics in the visible light band [see J. 2011) 3861–3877] have been widely studied and applied ...

AI Technical Summary

Problems solved by technology

However, the contradiction between the thickness of ZnO and the efficiency of organic batteries has always been difficult to solve: ZnO that is too thin does not cover the ITO substrate completely, and the active layer will directly contact with ITO when preparing battery devices, resulting in leakage. channel; however, although the thick ZnO film can effectively isolate the ITO electrode and the active layer, the low conductivity of ZnO limits the improvement of battery efficiency

By doping a small amount of metal ions, the electrical properties of ZnO thin films can be greatly improved [see V.Fathollahi, M.M.Amini, Sol–gel preparation of highly oriented gallium-doped zinc oxide thin films [J].Materials Letters,2001,50(4):235-239; E.Luna-Arredondo, A.Maldonado, R.Asomoza, et al. J].AppliedSurfaceScience,2007,253(11):4911-4916], but these methods are specifically aimed at preparing transparent conductive oxide (ZnO) thin films (TransparentConductingOxide, TCO), and its preparation methods (such as high temperature 600 ° C annealing, etc.) Not suitable for organic polymer solar cells