Modulation of Ionically Generated Space Charge Effects at Hybrid Perovskite and Oxide Interfaces via Surface Modification

• DOI: 10.1002/admi.202300874
• Publication Date: 2024-02-09T06:14:51Z
• Authors: Mina Jung; Masaud Almalki; Michael Graetzel; Davide Moia; Joachim Maier
• Keywords: Surface Modification; Modulation (music); Surface charge

Abstract Interfacial space charges significantly influence transport and recombination of charge carriers in optoelectronic devices. Due to the mixed ionic‐electronic conducting properties halide perovskites, not only electronic effects, but also ionic interactions at their interfaces need be considered analysis charges. Understanding these control is currently missing. This study elucidates effects on formation interface between methylammonium lead iodide (MAPI) alumina, its modulation through surface modification using organic molecules. Embedding insulating alumina nanoparticles within MAPI films leads enhancement conductivity. effect consistent with an interfacial inversion layer can explained basis interactions. Such attenuated by oxide via chemisorption Finally, same trend observed solar cells, where reducing potential distributed composite active improves device performance. These findings emphasize necessity taking into account involving conductors, essential aspect performance optimization perovskite‐based