INS5-1548
Tailoring Perovskite Surfaces and Interfaces through Interfacial Molecular Interactions for Multifunctional Optoelectronics
When and Where
Oct 1, 2026
17:05 - 17:20
Presenter(s)
Min Kim (University of Seoul)
Co-Author(s)
Abstract
Metal halide perovskites have emerged as a versatile platform for next-generation optoelectronics, yet their soft ionic lattices leave surfaces, grain boundaries, and buried interfaces populated with defects that limit both device efficiency and operational stability. In this talk, I will present our group’s strategies for tailoring perovskite surfaces and interfaces through deliberately designed interfacial molecular interactions and show how these interactions serve as a general toolbox for multifunctional optoelectronic devices. Especially, ionic liquid engineering enables bidentate coordination that simultaneously passivates trap states and stabilizes the photoactive phase, while cyclic ionic molecules and lattice-matched low-dimensional phases formulate multidimensional perovskite architectures with suppressed nonradiative recombination. At buried interfaces, self-assembled monolayers and interlayer molecular doping modulate energy-level alignment and charge extraction, extending the approach to tin-based perovskite solar cells and to single-crystalline perovskite films with controlled crystal mosaicity. Beyond photovoltaics, the same interfacial design principles enable conjugated polymer-driven compact crystal packing in perovskite quantum dot solar cells, polymer-passivated and quantum dot-enhanced photodetectors for infrared sensing, and perovskite-functionalized transistor-type gas sensors. Taken together, these results establish the rational design of interfacial molecular interactions as a unifying strategy for defect management, long-term stability, and functional versatility across perovskite-based multifunctional optoelectronics.
