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Bright self-trapped exciton emission in alkali iodide nanocrystals via Sn(II)-doping.
- Source :
- Journal of Materials Chemistry C; 7/21/2024, Vol. 12 Issue 27, p9978-9985, 8p
- Publication Year :
- 2024
-
Abstract
- Lead-free alkali halides have gained increasing attention owing to their desired optoelectronic properties across a variety of light-emitting applications. However, state-of-the-art alkali halide emitters commonly are bulky crystals functionalized with highly toxic elemental doping, hindering their integration into emerging flexible, wearable and large-area optoelectronic devices. Herein, we have developed environmental friendly and solution-processable alkali halide nanocrystals that exhibit intense self-trapped emission facilitated by Sn<superscript>2+</superscript> ionic doping. We find that the presence of Sn<superscript>2+</superscript>-interstitial leads to the tilting of cubic structures of RbI and thus triggers the self-trapped emission. The resultant tin(II)-doped RbI and Rb<subscript>x</subscript>Cs<subscript>1−x</subscript>I nanocrystals display an impressive maximum photoluminescence quantum yield of 91.9% and exhibit remarkable stability under ambient conditions. These findings pave the way for a new class of bright, solution-processable alkali halides, with diverse applications such as energy down conversion and flexible scintillation technologies. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507526
- Volume :
- 12
- Issue :
- 27
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry C
- Publication Type :
- Academic Journal
- Accession number :
- 178401044
- Full Text :
- https://doi.org/10.1039/d4tc01428f