光探测
硫化铅
材料科学
化学气相沉积
X射线光电子能谱
透射电子显微镜
光电子学
化学浴沉积
云母
纳米技术
光电探测器
化学工程
带隙
量子点
复合材料
工程类
作者
Yizhou Gu,Yifan Wang,Jing Xia,Xiang‐Min Meng
标识
DOI:10.1088/0256-307x/37/4/048101
摘要
Non-layered two-dimensional (2D) lead sulfide (PbS) has attracted growing interest recently due to its direct narrow bandgap (0.4 eV) and broad spectral detection from visible to mid-IR region, which lead to remarkable electronic and optoelectronic properties promising for real applications. We report the chemical vapor deposition growth of highly crystalline 2D PbS crystals on mica substrates. The high quality and uniformity of 2D PbS nanoplates are confirmed by atomic force microscopy, x-ray powder diffraction, transmission electron microscopy and x-ray photoelectron spectroscopy. The morphology and lateral size are controllable by different growth temperatures. Photodetectors made from 2D PbS nanoplates reveal good stability, high photoresponsivity, and fast response time, which indicates their promising applications for ultrathin optoelectronics.
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