.png){kind=icon}
.png){kind=icon}
Return
Centimeter-Scale In-Based Perovskite Single Crystals with Near 100% Quantum Yield via Self-Trapped Exciton Emission
.png){kind=icon}
PRE
AI
S
L
W
W
L
王
Z
DOI：10.1021/acs.jpcc.6c01599.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Indium-based halide perovskites oftentimes exhibit limited photoluminescence quantum yield (PLQY) due to weak optical absorption, which restricts their utility in luminescent applications. However, self-trapped exciton (STE) modulation through crystal engineering offers a promising pathway to enhance emission efficiency. In this study, we report the low-temperature (20-85 degrees C) synthesis of centimeter-scale lead-free perovskite single crystals of CsIn1-xSbxCl4, which demonstrate intense broadband STE emission at room temperature and achieve an unprecedented PLQY of 100%, the highest reported value for indium-based halides to date. Femtosecond spectroscopy elucidated the physical origin by mapping the complete dynamics: the sub-picosecond (sub-ps) formation of the singlet (STE)-S-1, its transition to the triplet (STE)-S-3 within tens to hundreds of ps, and the subsequent mu s-scale radiative recombination. This work thus offers critical insights into STE-driven design strategies for next-generation optoelectronic devices of single component white-light emission.
Keywords:
LEAD-FREE
BLUE
NANOCRYSTALS
STABILITY
DESIGN
Journal
IF:
3.2
Papers:
5.6W
Citations:
15.0W
Organization
Cited Papers