Strategies for Stabilizing Metal Halide Perovskite Light-Emitting Diodes: Bulk and Surface Reconstruction of Perovskite Nanocrystals

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

Light-emitting colloidal lead halide perovskite nanocrystals (PeNCs) are considered promising candidates for next-generation vivid displays. However, the operational stability of light-emitting diodes (LEDs) based on PeNCs is still lower than those polycrystalline films, which requires an understanding defect formation in PeNCs, both inside crystal lattice ("bulk") and at surface. Meanwhile, uncontrollable ion redistribution electrochemical reactions under LED operation can be severe, also related to bulk surface quality a well-designed device architecture boost carrier injection balance radiative recombination. In this review, we consider reconstruction by enhancing rigidity rationally selecting ligands. Degradation pathways applied voltage discussed, strategies avoid undesirable migration PeNC films. Subsequently, other critical issues hindering commercial application LEDs including toxicity Pb perovskites, scale-up deposition design active-matrix prototypes high-resolution modules.

Language: Английский

Chiral metal halide perovskites toward room temperature spin light-emitting diodes: Insights and perspectives

Chemical Physics Reviews, Journal Year: 2025, Volume and Issue: 6(2)

Published: April 14, 2025

Chiral metal halide perovskites (MHPs) have emerged for the excellent integration of spin states freedom with optoelectronic properties. The chiral-induced selectivity (CISS) effect enables chiral MHPs great potential to spin-dependent applications. In this review, we briefly summarize construction principles and recent discoveries on CISS MHPs. Then, room temperature light-emitting diodes (spin-LEDs) based are discussed. end, challenges opportunities related spin-LEDs proposed.

Language: Английский