期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 121, 期 9, 页码 4799-4805出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b10640
关键词
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资金
- Woo Jang Chun Special Project [PJ009106022013]
- RDA, Degree and Research Center Program
- NST, the Basic Science Researcher Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science, and Technology, Korea [NRF-2013R1A1A2012829, NRF-2015R1A2A2A01003520]
We fabricated green-red (GR) and blue-red (BR) bilayer stacked quantum dots (QDs) using electrospray deposition. Along with steady state and time-resolved photoluminescence (PL), subnanosecond donor PL decay and corresponding acceptor PL rise signals were observed, which are ascribed to the energy transfer between different visible QDs (heterotransfer). The heterotransfer rates were estimated as (0.57 +/- 0.01 ns)(-1) and (0.65 0.02 ns)(-1) for GR and BR systems, respectively, which agree well with theoretical calculations. Owing to their geometrical proximity, mixed QD layers with GR and BR showed qualitatively higher heterotransfer efficiencies of 64% and 81%, compared to stacked QD layers, which have efficiencies of 23% and 64%, respectively.
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