Wang Fang-Rong, Fan Wen-Yong, Zhai Wei-Wei, Zhang Tie-Qiang, Wang Yi-Ding, Zhang Yu
College of Communication Engineering, Jilin University, Changchun 130025, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2013 May;33(5):1153-6.
In the present paper colloidal PbSe nanocrystals were prepared with the particle size of 3.8 and 5.8 nm, and the temperature- dependent optical properties of colloidal PbSe nanocrystals were investigated. The experimental data show that the band gap, photoluminescence peak wavelength, photoluminescence intensity and full width at half-maximum of colloidal PbSe nanocrystals will change with variations in temperature and size at room temperature. The band gap of colloidal PbSe nanocrystals with the particle size of 3.8 nm shifts towards red when the temperature increases. However, the blue shift occurs when the particle size is 5.8 nm. The photoluminescence intensity of colloidal PbSe nanocrystals drops and the full width at half-maximum will increases with the increase in temperature.
在本文中，制备了粒径为3.8纳米和5.8纳米的胶体PbSe纳米晶体，并研究了胶体PbSe纳米晶体随温度变化的光学性质。实验数据表明，在室温下，胶体PbSe纳米晶体的带隙、光致发光峰值波长、光致发光强度和半高宽会随温度和尺寸的变化而改变。粒径为3.8纳米的胶体PbSe纳米晶体的带隙在温度升高时向红色方向移动。然而，当粒径为5.8纳米时会发生蓝移。胶体PbSe纳米晶体的光致发光强度随温度升高而下降，半高宽会增加。
