The band gap regulation of HgxCd1-xTe quantum dots by ion exchange and their near-infrared self-absorption characteristics

被引：0
|
作者：
Fang Shi-Yu [1 ]
Liu Zhen-Yu [1 ]
Jin Jia-Jie [1 ]
Shi Ji-Chao [1 ]
Fang Yong-Zheng [1 ]
Sun Chang-Hong [2 ]
Ye Zhen-Hua [2 ]
Liu Yu-Feng [1 ,2 ]
机构：
[1] Shanghai Inst Technol, Sch Mat Sci & Engn, Shanghai 201418, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Tech Phys, Key Lab Infrared Imaging Mat & Devices, Shanghai 200083, Peoples R China
来源：
JOURNAL OF INFRARED AND MILLIMETER WAVES | 2022年 / 41卷 / 02期
关键词：
HgxCd1-xTe QDs; ion exchange; near-infrared; self-absorption; AG2S; PBS;
D O I：
10.11972/j.issn.1001-9014.2022.02.001
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper???monodispersed CdTe quantum dots are synthesized by soft chemical method.Meanwhile???mer???cury cadmium telluride???HgxCd1-xTe???quantum dots with the quasi continuous visible to near-infrared spectrum are pre???pared by ion exchange adjusting the concentration of Hg2+.The variable temperature photoluminescence and self-absorp???tion characteristics of near-infrared Hg0.33Cd0.67Te quantum dots are deeply analyzed.The results indicate that the fluores???cence intensity of HgxCd1-xTe quantum dots decreases linearly with the increase of temperature???0 similar to 100 degrees C???.The spectralline broad and the peak position has a red-shift???12nm???.The partial overlap of absorption and emission spectra of quan???tum dots leads to self-absorption.The increase of self-absorption results in decrease of photoluminescence intensity while the concentration of quantum dots increases
引用
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页码：377 / 383
页数：7
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