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Recombination Dynamics of the Enhanced Quantum Efficiency in CdSe/ZnTe/ZnS Type‐II Quantum Dots
Author(s) -
Wang ChunHsiung,
Wei ChiliMing,
Huang ShengChih,
Chen YangFang,
Lai ChihWei,
Ho MeiLin,
Chou PiTai
Publication year - 2010
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201000077
Subject(s) - chemistry , quantum dot , exciton , photoluminescence , optoelectronics , semiconductor , recombination , coupling (piping) , trapping , core (optical fiber) , nanotechnology , condensed matter physics , optics , physics , materials science , ecology , biochemistry , biology , metallurgy , gene
Remarkable enhancement of the photoluminescence emission arising from CdSe/ZnTe/ZnS core‐shell type‐II quantum dots (QDs) has been observed when compared with their CdSe/ZnTe counterparts. Comprehensive studies on the recombination dynamics draw a conclusion that the underlying mechanisms such as reduction of the exciton‐phonon coupling strength and surface trapping play key roles for the improvement of optical properties. Our finding is important for the creation of highly efficient optoelectronic devices derived from type‐II semiconductor QDs.