Study Of Organic Inorganic Hybrid Perovskite Solar Cell Interface Layer

As the most rapid development of organic- inorganic hybrid perovskite solar cells the perovskite solar cell are paid many attention. Perovskite solar cell, which was named after its light absorb material, combines with the electronic transporting materials, solid hole-transporting materials, and the photoelectric conversion efficiency was over 20%. In term of structure, the perovskite solar cell is divided into mesoporous structure and planar structure. The planar structure, compared to mesoporous structure, simplifies the preparation process methods and reduce cost, and have a potential to be used in flexible substrates. On the one hand, for perovskite solar cell the crystal and morphology of the light absorption material is critical for the device performance, which is determined by the preparation methods and process; on the other hand, the energy matching of each layer in planer perovskite solar cell has a significant impact on the cell efficicncy. Based on the above two points, the content of this thesis is divided into two parts.In first part: the optimization of planar perovskite solar cell layers, including the block layer, perovskite layer and hole transport layer, and the process. In second part: modification of TCO/perovskite interface. There were two ways to modify TCO/perovskite interface. One was plasma treatment to improve TCO surfacework funcation. We adopted O2, Ar, N2 plasmas to treat TCO and prepare perovskite solar cells without dense layer..Other was ALD depositing Al doped ZnO on the FTO. We used ALD Al-ZnO and Al-TiO2 to modify FTO/perovskite interface.