A perovskite solar cell based on mesoporous inorganic hole transport material and a preparation method thereof

Abstract

The invention discloses a perovskite solar cell based on a mesoporous inorganic hole transport material and a preparation method thereof. The solar cell comprises a conductive glass layer, a dense hole transport layer, a mesoporous hole transport layer, a perovskite light absorbing layer, an electron transport layer, a hole blocking layer and a counter electrode layer in order from bottom to top.The invention interchanges the positions of the electron transport layer and the hole transport layer in the traditional mesoscopic perovskite battery, a mesoporous material is prepared between the ultrathin and dense hole material and the perovskite material, an inverted mesoscopic device with a double-layer hole transport layer is obtained, which can not only solve the problems of poor carrier transport efficiency and relatively low photoelectric conversion performance of planar heterojunction perovskite solar cells, but also solve the problem of high-temperature preparation of electron transport materials with traditional positive mesoscopic structure. Moreover, the use of inorganic hole transport materials solves the problem of poor thermal stability of traditional organic hole transport materials.

Description

technical field [0001] The invention belongs to the field of photovoltaics, and in particular relates to a perovskite solar cell based on a mesoporous inorganic hole transport material and a preparation method thereof. Background technique [0002] At present, perovskite (perovskite) solar cell structures mainly include the following three types: (a) upright planar structure, (b) inverted planar structure, and (c) mesoscopic structure. [0003] Planar structure perovskite solar cells are simple in structure and easy to prepare, but there are big problems in stability. At the same time, the photoelectric conversion performance of planar heterojunction perovskite solar cells is generally relatively low, and the carrier transport efficiency is poor. [0004] Mesoscopic structure batteries are currently the mainstream structure for obtaining high-efficiency batteries. The general structure of traditional mesoscopic structure perovskite solar cells is as follows from bottom to to...

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Problems solved by technology

[0007] In view of this, this application provides a perovskite solar cell based on mesoporous inorganic hole transport materials and its preparation method, which can not only solve the problem of poor carrier transport efficiency and photoelectric conversion of planar heterojunction perovskite solar cells. The performance is generally relatively low, and at the same time, it solves the problem of high-temperature preparation of electron transport materials with traditional upright mesoscopic structures

Moreover, inorganic hole materials have excellent thermal stability, which overcomes the problem of poor thermal stability of traditional organic hole transport materials.

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