Light-induced improvement on performance of MAPbI3-xClx perovskite nanowires solar cells

One-dimensional perovskite nanowires (PNWs) materials have attracted attention in integrated photonics and photovoltaic device due to their unique optoelectronic properties, such as large-scale optoelectronic integration, high-density data storage and low defect states density. However, many fundamental questions concerning structure and performance, especially the light-induced performance changes in the PNWs solar cells are still unclear. In this work, a continuous light irradiation (0-90 mins) was carried out to study the device performance, structure changes and electrochemical dynamics property in MAPbI3-xClx PNWs devices. We observed that the device efficiency first increases and then decreases with the prolongation of light illumination time. When the illumination reaches to 5 mins, the device exhibits a highest PCE of 15.06%, which possibly due to structural change caused by the ion migration and accumulation. The possible mechanism was elaborated for the first time.

Automated summary

The article introduces the research status of one-dimensional perovskite nanowire materials in the field of photonics and photovoltaic devices, and investigates their performance and structural changes under light conditions. The study found that the prolongation of light illumination time has an impact on the device efficiency, possibly due to structural changes caused by ion migration and accumulation.