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Electrochemical synthesis of hierarchical porous PbSe film and its infrared photodetection properties
Yang, Chan1; Zhang, Xinru1,2,3; Li, Pei1; Chen, Shi1,2,3; Feng, Shuanglong1,3
2024-08-01
摘要Lead selenide (PbSe) has been extensively studied as an infrared detection material capable of operating at room temperature. In this research, we proposed a simple cyclic voltammetry (CV) electrodeposition of hierarchical porous PbSe on single -layer graphene film. Scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy were used to evaluate the physical and surface characteristics of porous PbSe films. The porous structure with large surface to volume ratio will enhance the light absorption ability after effectively sensitized in oxygen atmosphere. Furthermore, oxygen -sensitized processes create electron traps at grain boundaries, extending the lifetime of the hole carrier and improving photoconductive sensitivity. At room temperature, the porous PbSe/graphene photodetector exhibit a responsivity of 12.3 A/W, a detectivity of 5.95 * 10 8 cm Hz 1/2 W -1 (@1 kHz) at 1.55 mu m, and a responsivity of 15.2 A/W, a detectivity of 1.4 * 10 9 cm Hz 1/2 W -1 (@1 kHz) at 2.7 mu m. This work highlights the low cost and effective electrodeposition strategy for constructing hierarchical porous structure with further application in infrared photodetection.
关键词Electrochemical Porous PbSe Infrared photodetection
DOI10.1016/j.apsusc.2024.160145
发表期刊APPLIED SURFACE SCIENCE
ISSN0169-4332
卷号663页码:8
通讯作者Feng, Shuanglong(fengshuanglong@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:001233362300001
语种英语