期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 6, 期 10, 页码 2573-2579出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8tc00288f
关键词
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资金
- National Science Foundation of China [51774034, 51772026, 51611130063]
- Beijing Natural Science Foundation [2182039]
- Fundamental Research Funds for the Central Universities [FRF-BD-16-012A]
- 111 Project [B17003]
Green'' narrow band-gap CuInSe2 quantum dots (QDs) were first introduced in photodetectors. Thus, a broadband hybrid photodetector was obtained by combining the ultraviolet detection of spiro-OMeTAD and the near-infrared detection of CuInSe2 QDs. In order to improve the detection of the device, the oil-soluble CuInSe2 QDs were transformed into water-soluble MPA-capped QDs through ligand exchange, which drastically shortened the length of the surface ligand. The specific detectivity (D*) of the photodetector reached 1.6 x 10(12) Jones at 330 nm and 7.5 x 10(10) Jones at a 1000 nm wavelength. The unencapsulated device also displayed a fast response time (< 0.02 s) and excellent thermal stability (20-100 degrees C) in ambient air. This work could open a window of toxic-free QD based photodetectors to achieve a broadband response.
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