Fabrication Of Perovskite Solar Cells And The Photoelectric Conversion Performance

Perovskite solar cell is a new type of thin film solar cells, compared with the conventional liquid dye sensitized solar cell（DSSCs）, it has the advantages of the low cost of raw materials prepared process, low energy consumption, higher photoelectric conversion efficiency, simple in preparation, and suitable for large area production. Now, in just 6 years the efficiency of perovskite solar cell have been certified as more than 21%, which is a powerful driving force for the development of solar cell industry.The work of this paper mainly focuses on the working mechanism, structure design and the preparation process optimization of the perovskite solar cell. At the same time early work of preparation and characterization analysis on Cu In Se quantum dot sensitized solar cell provide valuable knowledge accumulation and experience for post work of the preparation and mechanism analysis on perovskite solar cell. Quantum dot sensitized solar cells is still liquid sensitized solar cells, in comparison, the using of new light-absorbing materials CH₃NH₃ Pb I₃ and solid state hole transporting materials Spiro-OMe TAD make perovskite solar cells have an incomparable advantages in efficiency improvements and production.（1） Two-step sequential deposition method was used for preparing of perovskite solar cell based on CH₃NH₃ Pb I₃. The control of reaction time between Pb I2 and CH₃NH₃ I has a great influence on particle size, morphology of CH₃NH₃ Pb I₃ layer and photoelectric conversion efficiency. By adjusting the reaction time of Pb I2 and CH₃NH₃ I, a conversion efficiency of 14.5% was obtained.（2） The pore structure of mesoporous Ti O₂ play a great role on short-circuit current of perovskite solar cell, in order to improve the photoelectric conversion efficiency and study the electronic transport mechanism of the mesoporous Ti O₂ layers. In order to obtain different pore structure of Ti O₂ thin films, mesoporous Ti O₂ layers were treated with Ti Cl4 aqueous solution for different time. The influence of the pore structure of Ti O₂ on the film formation properties of CH₃NH₃ Pb I₃ thin filmsand electron transport properties was studied, and the cell efficiency was increased to15%.（3） Zn O@Cu In Se composite anode material was prepared by a vacuum one-pot-nanocasting process, We fabricated the quantum dot-dye bilayer-sensitized solar cells（QDBSC） with N719 and the Cu In Se quantum dot, and studied its conversion efficiency with 6.66%...