Linear organic hole transport material and preparation and application thereof

the invention discloses a linear organic hole transport material as well as a preparation method and application thereof. According to the linear organic hole transport material, a rigid coplanar thiophene fused heterocycle serves as a parent core, the linear planar molecular structure can effectively improve the hole mobility and the conductivity, and the material has good dissolving film-formingperformance and excellent photo-thermal stability. The preparation method for the linear organic hole transport material has the advantages that the synthetic route is simple, the raw materials are easily available, the cost is low, when the prepared hole transport material is applied to a perovskite solar cell, the short-circuit light current density of a battery device reaches 22.31 mA cm,the open-circuit voltage is 1.094 V, the filling factor is 0.756, the photoelectric conversion efficiency reaches 18.45%, and therefore the efficiency of the perovskite solar cell is improved, and a wide application prospect i