Multicolor Photodetector of a Single Er(3+)-Doped CdS Nanoribbon.
Multicolor Photodetector of a Single Er(3+)-Doped CdS Nanoribbon.
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单一 Er3 掺杂 CdS 纳米带的多色光电探测器
DOI：
10.1186/s11671-015-0975-3
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发表时间：
2015-12
影响因子：
--
通讯作者：
Yu DP
中科院分区：
文献类型：
--
作者：
Dedong H;Ying-Kai L;Yu DP
Er3+-doped CdS nanoribbons (Er-CdS NRs) are synthesized by thermal evaporation and then characterized by field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), photoluminescence (PL), and absorption spectra. The Er-CdS NR photodetector is studied systematically, including spectral response, light intensity response, and photoconductance (G) versus temperature (T). It is found that Er-CdS NR has the ability of detecting multicolor light including blue, red, and near-infrared light with higher responsivity (Rλ) and external quantum efficiency (η). The conductance of Er-CdS NR under dark conditions decreases with increasing temperature in the range of 87–237 K, while its conductance increases with increasing temperature in the range of 237–297 K whenTis larger than 237 K. These results indicated that ionized impurities and the intrinsic excitation are responsible for the conductance change of Er-CdS NR in the dark. The superior performance of the Er-CdS NR device offers an avenue to develop highly sensitive multicolor photodetector applications.
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