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9 February 2005Ultrafast dynamics of electron and hole in ZnSe quantum dots in gel glasses
ZnSe/SiO2 silica gel glasses were prepared through a sol-gel process. A femtosecond transient absorption spectroscopy and a time-resolved photoluminescence spectroscopy were used to detect the electron and hole relaxation in the ZnSe QDs. In the case of excitation 3.76eV, the TA and PL spectra were detected. The results showed that two competing processes, electron-hole recombination and surface electron trapping, occur in 10~100 ps time scale and the holes on valance band decay in about 1 ps.
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Junfang He, Minqiang Wang, Zhihui Luo, Sujuan Zhang, Shuicai Wang, "Ultrafast dynamics of electron and hole in ZnSe quantum dots in gel glasses," Proc. SPIE 5635, Nanophotonics, Nanostructure, and Nanometrology, (9 February 2005); https://doi.org/10.1117/12.576674