Indolo [3, 2, 1-JK] carbazole-based main body stable assembly transmission material and preparation method thereof, and perovskite solar cell and preparation method thereof

Abstract

The invention discloses a hole transport material with a series of planar conjugated rigid structures, a preparation method of the hole transport material, a perovskite solar cell and a preparation method of the perovskite solar cell. A series of hole transport materials with indolo [3, 2, 1-JK] carbazole as a main body are provided, the indolo [3, 2, 1-JK] carbazole has a completely planarized arylamine structural unit, the planar structure is beneficial to delocalization and conjugation of electrons, the energy of molecules can be effectively reduced, and the molecules are more stable in an excited state, so that the luminous efficiency and the stability are improved. In addition, the molecules are high in rigidity, vibration and rotational freedom in the molecules are reduced, the probability of non-radiative transition is reduced, excited state energy is more likely to be released in a radiative transition mode, and then the fluorescence quantum yield is increased. The hole transport material with excellent photo-thermal stability is simple in preparation method, does not need to add a dopant, is low in cost, basically does not have byproducts in the synthesis process, is easy to separate and purify, is applied to a perovskite solar cell, can obtain the photoelectric conversion efficiency of 23.37%, and has good application prospects. And in addition, the open-circuit voltage Voc also reaches amazing 1.15 V, the charge recombination is weak, and the method has a wide application prospect.

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