Journal
OPTICS LETTERS
Volume 41, Issue 18, Pages 4297-4300Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.41.004297
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Funding
- National Natural Science Foundation of China (NSFC) [61275108]
- Natural Science Foundation of Zhejiang Province in China [Y111049, LY15F050009]
- Foundation of Zhejiang Educational Committee [Y201430784]
- Beixiu Youth Program of Zhejiang University City College
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Localized surface plasmon resonance coupling effects (LSPR) have attracted much attention due to their interesting properties. This Letter demonstrates significant photoluminescence (PL) enhancement in the Au NS/CH3NH3PbI3-xClx heterostructures via the LSPR coupling. The observed PL emission enhancement is mainly attributed to the hot electron energy transfer effect related to the LSPR coupling. For the energy transfer effect, photo-generated electrons will be directly extracted into Au SPs, rather than relaxed into exciton states. This energy transfer process is much faster than the diffusion and relaxation time of free electrons, and may provide new ideas on the design of high-efficiency solar cells and ultrafast response photodetectors. (C) 2016 Optical Society of America
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