期刊
ACS APPLIED NANO MATERIALS
卷 3, 期 4, 页码 3305-3314出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.0c00051
关键词
perovskite; MXene; charge transfer; cadmium detection; photodetector
资金
- DST (Government of India) under the Nanomission Thematic Unit program [SR/NM/TP-13/2016]
- CERI program [DST/TM/CERI/C99 (G)]
- DST-SERB [EMR/2015/001561]
- Department of Atomic Energy via the Raja Ramanna fellowship program
- UGC [201617PH/15-16/0097]
- SERB-NPDF [PDF/2017/001957]
- GCRF-SUNRISE
- DST-SERB
A van der Waals heterostructure between all-inorganic CsPbBr 3 halide perovskite quantum dots (CPB QDs) and Ti(3)C(2)T(x )MXene (MXN) QDs is realized, and the photophysics of the composite is examined. A strong quenching of the steady-state photoluminescence of the perovskite QDs is observed, which is further examined by a time-resolved photoluminescence study. It is attributed to the charge transfer from CPB to MXN QDs followed by rapid energy relaxation of hot electrons and hot holes toward the band edge, leading to their recombination with photon energy in the far-IR energy domain. It is further shown that the CPB-MXN QD/QD system acts as an excellent on-off-on photoluminescence probe for cadmium ion detection and also as an active material for photodetector application.
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