Zhang Lei, Xu Qinfeng, Liu Mingliang, Kong Lingbin, Jiao Mengmeng, Mu Haifeng, Wang Dehua, Wang Honggang, Chen Jiannong, Yang Chuanlu
School of Physics and Optoelectronic Engineering, Ludong University, YanTai, 264025, China.
Ministerial Key Laboratory of JGMT, Nanjing University of Science and Technology, Nanjing, 210094, China.
Nanoscale Res Lett. 2017 Dec;12(1):222. doi: 10.1186/s11671-017-1971-6. Epub 2017 Mar 24.
Temperature and wavelength dependence of energy transfer (ET) process between quantized states and surface trap states of CdSe quantum dots was investigated, respectively. The experimental results demonstrate that the photoluminescence (PL) intensity of the quantized states decreases with respect to the trap state emission, especially at lower temperatures. The observed ET process between quantized states and trap states which is influenced by the thermal population behavior. At the same temperature, the silver films can greatly enhance the energy transfer (ET) rate from the quantized states to trap states due to surface plasmonic coupling effect.
分别研究了CdSe量子点的量子化态与表面陷阱态之间能量转移（ET）过程的温度和波长依赖性。实验结果表明，量子化态的光致发光（PL）强度相对于陷阱态发射会降低，尤其是在较低温度下。观察到量子化态与陷阱态之间的ET过程受热载流子行为影响。在相同温度下，由于表面等离子体耦合效应，银膜可大大提高从量子化态到陷阱态的能量转移（ET）速率。
