Ultrafast dynamics of a highly-emissive zero-dimensional organic tin bromide perovskite
Autor: | Xin Xu, Tianjia Yu, Ruiling Zhang, Zhongyi Wang, Xin Mao |
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Rok vydání: | 2021 |
Předmět: |
Photoluminescence
Materials science Exciton General Physics and Astronomy Quantum yield chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Condensed Matter::Materials Science Intersystem crossing chemistry Ultrafast laser spectroscopy Singlet state Physical and Theoretical Chemistry 0210 nano-technology Tin Perovskite (structure) |
Zdroj: | Chemical Physics Letters. 769:138411 |
ISSN: | 0009-2614 |
DOI: | 10.1016/j.cplett.2021.138411 |
Popis: | A zero-dimensional (0D) yellow emissive tin bromide perovskite with near-unity photoluminescence quantum yield (PLQY) was synthesized. The ultrafast excited-state dynamics of the yellow emissive perovskite was investigated by using femtosecond transient absorption spectroscopy. Two ultrafast dynamics processes, intersystem crossing (ISC) from a dark singlet self-trapped exciton (STE) state to a triplet STE state with time constant of 571 fs, and a cooling of a hot triplet STE state with time constant of 28.6 ps were unveiled. A clear mechanism depicting the growth and decay pathways of STEs in the 0D assembly was provided. |
Databáze: | OpenAIRE |
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