Polymer solar battery with inverted structure and manufacturing method thereof

Abstract

The invention provides a polymer solar battery with an inverted structure. According to the polymer solar battery, an laminated structure is composed of a glass substrate, an indium tin oxide (ITO) transparent conducting film, an electron transporting layer, an interface modification layer, an organic active layer and an MoO3 / Ag composite electrode in sequence, wherein the electron transporting layer is a zinc aluminum oxide (ZAO) thin film, the interface modification layer is a polyvinylpyrrolidone thin film, and the organic active layer is a poly-3-hexyl thiophene-fullerene derivative thin film. The polymer solar battery with the inverted structure has the advantages that polyvinylpyrrolidone is used as the interface modification layer, so that materials of the organic active layer make tight contact with materials of the inorganic electron transporting layer, the series resistance of a device can be effectively reduced, the parallel resistance of the device can be effectively increased, charge carriers are effectively collected, carrier recombination is reduced, the number of fill factors of the battery is obviously increased, and energy conversion efficiency of the battery is obviously improved; on the premise of not increasing cost, large-area commercial production can be facilitated, the industrialization process of the polymer solar battery is accelerated, and social demands are met.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to an inverted structure polymer solar cell and a preparation method thereof. Background technique [0002] In recent years, organic inverted structure polymer solar cells have mostly used inorganic metal oxides, such as ZnO and aluminum-doped zinc oxide (AZO), as the electron transport layer. Due to its non-toxicity, low price, excellent stability, and high electron migration High transmission rate and high transmission characteristics in the visible light band, see J. Huang, Z. Yin, Q. Zheng, Applications of ZnO in organic and hybrid solar cells, Energy & Environmental Science, 4(2011) 3861–3877. Due to the difference in surface energy between ZnO (or AZO) and the organic active layer material, the quality of the contact interface between the two is poor, which increases the series resistance of the inverted structure polymer solar cell and lowers the cell fill factor. In or...

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Problems solved by technology

However, these interface modification materials require molecular design and chemical synthesis, which not only increases the cost of battery preparation, but also partially self-assembled monolayers are corrosive, and the mutual compatibility with the upper and lower contact materials is especially important when preparing battery devices. Careful consideration is required, see S.K. Hau, Y.-J. Cheng, H.-L. Yip, et al. ACS Appl. Mater. Interfaces, 2 (2010) 1892-1902

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