Journal of Infrared and Millimeter Waves, Volume. 41, Issue 2, 377(2022)
The band gap regulation of HgxCd1-xTe quantum dots by ion exchange and their near-infrared self-absorption characteristics
Fig. 1. Schematic of the Hg2+ cation exchange mechanism of HgxCd1-xTe QDs(a)crystal structure,and(b)band gap
Fig. 2. (a)Photoluminescence spectra,(b)absorption spectra of HgxCd1-xTe quantum dots with the increase of Hg2+ concentration,(c)band gap of HgxCd1-xTe quantum dots with the increase of Hg2+ concentration,and(d)time-resolved photoluminescence decay curves of HgxCd1-xTe quantum dots
Fig. 3. (a)TEM image and(d)HRTEM image of 626nm CdTe quantum dots.(b)TEM image and(e)HRTEM image of Hg0.05 Cd0.95Te quantum dots.(c)TEM image and(f)HRTEM image of Hg0.42 Cd0.58 quantum dots
Fig. 4. (a)Fourier transform infrared spectra of OA,Cd(OA)2,CdTe,HgCdTe at wavenumber of 1 800-1 000cm-1.(b)XRD patterns of CdTe quantum dots with fluorescence emission peak at 626 nm,HgxCd1-xTe quantum dots at 723 nm and 815 nm
Fig. 5. (a)The photoluminescence intensity of Hg0.33Cd0.67Te QDs at 0-100℃,(b)The relationship between temperature and the photoluminescence intensity of Hg0.33Cd0.67Te QDs,(c)Variable photoluminescence of Hg0.33Cd0.67Te QDs with the increase of Hg0.33Cd0.67Te QDs’ concentration,(d)The relationship between the concentration change of Hg0.33Cd0.67Te QDs and photoluminescence intensity
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Shi-Yu FANG, Zhen-Yu LIU, Jia-Jie JIN, Ji-Chao SHI, Yong-Zheng FANG, Chang-Hong SUN, Zhen-Hua YE, Yu-Feng LIU. 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
Category: Research Articles
Received: Aug. 5, 2021
Accepted: --
Published Online: Jul. 8, 2022
The Author Email: Yong-Zheng FANG (fangyongzheng@gmail.com), Yu-Feng LIU (yfliu@mail.sitp.ac.cn)