[1] [1] X Y Cheng, S B Lowe, J J Gooding, et al.. Colloidal silicon quantum dots: from preparation to the modification of self-assembled monolayers (SAMs) for bio- applications[J]. Chem Soc Rev, 2014, 43(8): 2680-2700.

[2] [2] O E Semonin, J M Luther, M C Beard. Quantum dots for next generation photovoltaics[J]. Mater Today, 2012,15(11): 508-515.

[3] [3] M Schmidt, H Haberland. Phase transitions in clusters[J]. C R Phys, 2002, 3(3): 327-340.

[4] [4] J R Lakowicaz. Principle of Pluorescence Spectroscopy[M]. New York: Academic Press, 1999: 95-163.

[5] [5] X Y Wang, L H Qu, X G Peng, et al.. Surface-related emission in highly luminescent CdSe quantum dots[J]. Nano Lett, 2003, 3(8): 1103- 1106.

[6] [6] D Yanover, R Vaxenburg, E Lifshitz, et al.. Significance of small-sized PbSe/PbS core/shell colloidal quantum dots for optoelectronic applications[J]. J Phys Chem C, 2014, 118(30): 17001-17009.

[7] [7] A Kigel, M Brumer, G Maikov, et al.. Thermally activated photoluminescence in lead selenide colloidal quantum dots[J]. Small, 2009, 5(14): 1675-1681.

[8] [8] G Zaiats, D Yanover, R Vaxenburg, et al.. PbSe/CdSe thin-shell colloidal quantum dots[J]. Z Phys Chem, 2015, 229(1-2): 3-21.

[9] [9] V I Kilmov, A Mikgailovsky, S Xu, et al.. Optical gain and stimulated emission in nanocrystal quantum dots[J]. Science, 2000, 290(5490): 314-347.

[10] [10] V I Kilmov. Mechanisms for photogeneration and recombination of multiexcitons in semiconductor, nanocrystals: implications for lasing and solar energy conversion[J]. J Phys chem B, 2006, 110(34): 16827-16845.

[11] [11] Cheng Cheng, Cheng Xiaoyu. Nanophotonics and Devices[M]. Beijing: Science Press, 2013: 159-166.

[12] [12] Cheng Cheng, Xu Yinhui. Near IR absorption-emission cross-sections of IV-VI group PbSe quantum dots doped in UV gel[J]. Acta Optica Sinica, 2014, 34(9): 0916002.

[13] [13] M Brumer, M Sirota, A Kigel, et al.. Nanocrystals of PbSe core, PbSe/PbS, and PbSe/PbSexS1-x core/shell as saturable absorbers in passively Q-switched near-infrared laser[J]. Appl Opt, 2006, 45(28): 7488-7497.

[14] [14] A Lipovskii, E Kolobkova, V Petrikov, et al.. Synthesis and characterization of PbSe quantum dots in phosphate glass[J]. Appl Phys Lett, 1997, 71(23): 3406-3408.

[15] [15] B L Wehrenberg, C Wang, P Guyot Sionnest, et al.. Interband and intraband optical studies of PbSe colloidal quantum dots[J]. J Phys Chem B, 2002, 106(41): 10634-10640.

[16] [16] G Schlegel, J Bohnenberger, I Potapova, et al.. Fluorescence decay time of single semiconductor nanocrystals[J]. Phys Rev Lett, 2002, 8(13): 137401.

[17] [17] W Y Wu, J N Schulman, T Y Hsu, et al.. Effect of size nonuniformity on the absorption spectrum of a semiconductor quantum dot system [J]. Appl Phys Lett, 1987, 51(10): 710-712.