Recombination processes in CuInS$_{2}$/ZnS Nanocrystals during   steady-state photoluminescence
  We report on temperature- and excitation-power-dependent photoluminescence (PL) study of CuInS$_{2}$/ZnS nanocrystals dispersed on a SiO$_{2}$/Si substrate with a confocal micro-PL system. With increasing the excitation power at 22 K and room temperature, the PL spectra are blue-shifted because of the state filling. At low temperature, a small peak is observed at the low energy side of the spectrum, which could be due to the F$\ddot{o}$rster resonance energy transfer between different nanocrystals. The integrated PL intensity increases sublinearly as a function of excitation power with a power factor of around 2/3, which demonstrates the Auger recombination dominated process in the nanocrystals, especially under the high excitation power. 
Yue Sun, Chenjiang Qian, Kai Peng, Zelong Bai, Jing Tang, Yanhui Zhao,   Shiyao Wu, Hassan Ali, Feilong Song, Haizheng Zhong...
cond-mat.mtrl-sci physics.optics