Blue-Violet Emission with Near-Unity Photoluminescence Quantum Yield from Cu(I)-Doped Rb3InCl6 Single Crystals.
Chao ZhangXuezhen FengQilin SongChaocheng ZhouLin PengJing ChenXiaolin LiuHong ChenJia LinXianfeng ChenPublished in: The journal of physical chemistry letters (2021)
Low-dimensional metal halides have attracted considerable attention due to their unique optoelectronic properties. In this study, we report a solid-state synthesis of air-stable all-inorganic Pb-free zero-dimensional (0D) Rb3InCl6 single crystals (SCs). By a heterovalent doping of Cu+ ions, the Rb3InCl6:Cu+ SCs featured an efficient blue-violet emission with a greatly enhanced photoluminescence (PL) quantum yield (95%) and an ultralong PL lifetime (13.95 μs). Combined with temperature-dependent PL and density functional theory calculations, we conclude that the efficient electronic isolation, enhanced exciton-phonon coupling, and electronic structure modulation after doping lead to bright blue-violet emission. Furthermore, the SCs exhibited excellent stability, maintaining 90% of the initial PL intensity after being stored in ambient conditions for more than two months. The results provide a new strategy for improving the optoelectronic properties of 0D all-inorganic metal halides, which is promising for potential light-emitting applications.
Keyphrases
- light emitting
- solid state
- density functional theory
- molecular dynamics
- aqueous solution
- room temperature
- quantum dots
- metal organic framework
- energy transfer
- particulate matter
- air pollution
- heavy metals
- water soluble
- working memory
- ionic liquid
- monte carlo
- high intensity
- molecular dynamics simulations
- human health
- risk assessment