Performance of Perovskite solar cells Doped with L-arginine

Abstract

Perovskite solar cells have become a research hotspot in the field of new energy due to the excellent performance and potential in application, but it still displays some disadvantages such as high defect density and poor stability. In this study, L-arginine, a small molecule of organic matter, was doped into the perovskite precursor solution by comparing the doping effects of various amino acids, and the perovskite solar cells were prepared by the two-element and two-step preparation method. The test results show that L-arginine doping improves the photoelectric performance of the device, and the photoelectric efficiency increases from 18.81% to 21.86%. L-arginine reduces the nonradiative recombination of carriers and increases the average carrier life by reducing the defect density of perovskite layer from 4.83×10 16 cm -1 to 3.45×10 16 cm -1 . In addition, the perovskite grain size increases, grain boundaries decrease, the light absorption ability and stability of the film are enhanced, and the hysteresis effect was also suppressed. Improvement of the photovoltaic performance is due to the passivation of defects by the interaction of various groups of L-arginine with perovskite materials. This study provides a reference method of the optimization of perovskite solar cells.

Multifunctional Polymer Restraint of the Agglomeration of SnO2 Nanocrystals for Efficient and Stable Planar Perovskite Solar Cells

“…In just over ten years, the advances on the development of perovskite solar cell (PSCs) have repeatedly pushed forward the record power conversion efficiency (PCE), increasing it to 25.7%. , On the one hand, this remarkable progress benefits from the distinctive optoelectronic properties of perovskite materials: excellent natural light absorption coefficient, long photogenerated carrier diffusion length, high defect tolerance, etc. − On the other hand, various optimization strategies proposed by photovoltaic researchers, including component regulation, interface engineering, improvement of the preparation process, etc., are also powerful driving forces for the leap in conversion efficiency. − Today, among various photovoltaic devices, PSCs have become the most powerful competitor of crystalline silicon solar cells in the field of photoelectric conversion.…”