Anti-ultraviolet hole transport material and application thereof in perovskite battery

Abstract

The invention provides an anti-ultraviolet hole transport material and an application thereof in a perovskite cell. According to the invention, a carbazole phosphoric acid organic small molecule self-assembly material is adopted, a connector is regulated and controlled through a molecular engineering means, a self-assembly hole transport layer is prepared based on a solution method, and an efficient and stable perovskite solar cell is obtained. The self-assembled hole transport material provided by the invention is (4 '-(3, 6-dimethoxy-9H-carbazole-9-yl)-[1, 1'-biphenyl]-4-yl) phosphonic acid, and compared with traditional [2-(3, 6-dimethoxy-9H-carbazole-9-yl) ethyl] phosphonic acid, biphenyl is introduced to replace an alkyl chain, so that electron delocalization can be improved, the charge transport performance is effectively improved, and the hole transport material can be applied to the field of electron transport. And the non-radiative recombination loss between interfaces is reduced, so that the conversion efficiency of the cell is improved. Meanwhile, according to the self-assembled hole transport layer designed by the invention, the rigidity and the ultraviolet light resistance of a molecular chain are enhanced by using a conjugated group, and the repeatability and the stability of a prepared device are further improved.

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