1.School of Materials Science and Engineering， Shanghai Institute of Technology， Shanghai 201418， China;2.Key Laboratory of Infrared Imaging Materials and Devices，Shanghai Institute of Technical Physics，Chinese Academy of Sciences，Shanghai 200083，China
the Open Foundation of Key Laboratory of Infrared Imaging Materials and Detectors (IIMDKFJJ-19-01), the Shanghai Natural Science Foundation (20ZR1455400)
In this paper， monodispersed CdTe quantum dots are synthesized by soft chemical method. Meanwhile， mercury cadmium telluride （HgxCd1-xTe） quantum dots with the quasi continuous visible to near-infrared spectrum are prepared by ion exchange adjusting the concentration of Hg2+. The variable temperature photoluminescence and self-absorption characteristics of near-infrared Hg0.33Cd0.67Te quantum dots are deeply analyzed. The results indicate that the fluorescence intensity of HgxCd1-xTe quantum dots decreases linearly with the increase of temperature （0～100 ℃）. The spectral line broad and the peak position has a red-shift （12 nm）. The partial overlap of absorption and emission spectra of quantum dots leads to self-absorption. The increase of self-absorption results in decrease of photoluminescence intensity while the concentration of quantum dots increases.
FANG Shi-Yu, LIU Zhen-Yu, JIN Jia-Jie, SHI Ji-Chao, FANG Yong-Zheng, SUN Chang-Hong, YE Zhen-Hua, LIU Yu-Feng. The band gap regulation of HgxCd1-xTe quantum dots by ion exchange and their near-infrared self-absorption characteristics[J]. Journal of Infrared and Millimeter Waves,2022,41(2):377~383Copy