期刊
NANO LETTERS
卷 20, 期 8, 页码 6185-6190出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c02557
关键词
narrow band gap nanocrystals; HgTe; electroluminescence; active imaging; short wave infrared
类别
资金
- ERC [756225, 853049]
- Region Ile-de-France of DIM Nano-K (Grant dopQD)
- French state funds [ANR-11-IDEX-0004-02]
- Grant IPER-Nano2, Copin [ANR-19-CE24-0022]
- Grant IPER-Nano2, Frontal [ANR-19-CE09-0017]
- Grant IPER-Nano2, Graskop [ANR-19-CE09-0026]
- Chinese Scholarship Council
- European Research Council (ERC) [853049, 756225] Funding Source: European Research Council (ERC)
Mercury telluride (HgTe) nanocrystals are among the most versatile infrared (IR) materials with the absorption of lowest energy optical absorption which can be tuned from the visible to the terahertz range. Therefore, they have been extensively considered as near IR emitters and as absorbers for low-cost IR detectors. However, the electroluminescence of HgTe remains poorly investigated despite its ability to go toward longer wavelengths compared to traditional lead sulfide (PbS). Here, we demonstrate a light-emitting diode (LED) based on an indium tin oxide (ITO)/zinc oxide (ZnO)/ZnO-HgTe/PbS/gold-stacked structure, where the emitting layer consists of a ZnO/HgTe bulk heterojunction which drives the charge balance in the system. This LED has low turn-on voltage, long lifetime, and high brightness. Finally, we conduct short wavelength infrared (SWIR) active imaging, where illumination is obtained from a HgTe NC-based LED, and demonstrate moisture detection.
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