Single Crystal Perovskite Solar Cells Design And Characteristics Study

The organic-inorganic hybrid perovskite solar cell,which is easy to prepare,low in cost and close to the conversion efficiency of silicon solar cell,has become the representative of the third generation solar cell which is widely concerned.The only way to realize its large-scale application is to further improve the stability and photovoltaic conversion effi-ciency of such cells through scientific research.At present,successful preparation of large-size single-crystal perovskite materials has been reported.Compared with polycrystalline perovskite films,single crystal materials have extremely low defect density,few interface defects and high mobility.Applying such materials to perovskite devices will result in more outstanding photoelectric conversion characteristics and stability.The effect of high mo-bility of monocrystalline perovskite on the performance of solar cells was studied in detail from this perspective by software simulation method,and the optimal parameter distribution ratio of charge transport layers and perovskite absorber layer were found in this paper,which further improved the photovoltaic performance of such devices.First of all,the current status of solar cell development,perovskite materials and sin-gle crystal materials experimental progress and the research trends of perovskite solar cells were reviewed in this paper.The structural composition,performance characterization and working principle of perovskite solar cells were introduced.Then,using single crystal tin-based perovskite solar cells as the research object,the effects of the mobility of the charge transport layers and the perovskite absorber layer on the performance of the perovskite solar cell were investigated detailedly using one-dimensional solar cell simulation software.The focus was on how to make full use of the high mobility of single crystal perovskite materials to improve the photovoltaic performance of the device,and ultimately the optimal mobility(12 cm~2/V?s)and thickness(1200 nm)of the optical absorption layer were obtained to further improve the photoelectric conversion efficiency of perovskite solar cells to 27.39%.Finally,the PIN type all-perovskite single crystal lead-based perovskite solar cell was used as the research object.The layer thickness,doping concentration and carrier mobility of the light absorber layer and charge transport layer in the device were optimized and matched in the process by means of software simulation.The optimization matching in the process improved the photovoltaic performance of the device and the performance impact on the device were studied to further improve the short-circuit current to 33.888 mA/cm~2and the photoelectric conversion efficiency of perovskite solar cells reached 28.101%.