Dendrimer Modification Strategy Based on the Understanding of the Photovoltaic Mechanism of a Perovskite Device under Full Sun and Indoor Light

Authors:
Publisher website
Google Scholar
Abstract
The wide-band-gap inorganic CsPbI2Br perovskitematerialprovides a highly matched absorption range with the indoor light spectrumand is expected to be used in the fabrication of highly efficientindoor photovoltaic cells (IPVs) and self-powered low-power Internetof Things (IoT) sensors. However, the defects that cause nonradiativerecombination and ion migration are assumed to form leakage loss channels,resulting in a severe impact on the open-circuit voltage (V (OC)) and the fill factor (FF) of IPVs. Herein,we introduce poly-(amidoamine) (PAMAM) dendrimers with multiple passivationsites to fully repair the leakage channels in the devices, takinginto account the characteristics of IPVs that are extremely sensitiveto nonradiative recombination and shunt resistance. The as-optimizedIPVs demonstrate a promising PCE of 35.71% under a fluorescent lightsource (1000 lux), with V (OC) increasedfrom 0.99 to 1.06 V and FF improved from 75.21 to 84.39%. The presentwork provides insight into the photovoltaic mechanism of perovskitesunder full sun and indoor light, which provides guidance for perovskitephotovoltaic technology with industrialization prospects.
Funding Information
  • National Key Research and Development Program of China (2018YFB1500103)
  • Basic and Applied Basic Research Foundation of Guangdong Province (2022A1515010746, 2022A1515011228)
  • Guangzhou Municipal Science and Technology Project (202201010458)
  • National Natural Science Foundation of China (62005099, 62104082)

This publication has 55 references indexed in Scilit: