期刊
ADVANCED MATERIALS INTERFACES
卷 9, 期 24, 页码 -出版社
WILEY
DOI: 10.1002/admi.202201175
关键词
photodetection; photoresponsivity; rare-earth doped 2D materials; short-wavelength infrared; up-conversion; WS; (2)
资金
- National Natural Science Foundation of China [11804120]
- Science Foundation of Guangzhou Program [2023A03J00229]
- Outstanding Youth Cultivation Program of Huizhou University [HZU202017]
- Professorial and Doctoral Scientific Research Foundation of Huizhou University [2020JB043]
- Program for Innovative Research Team of Guangdong Province & Huizhou University (IRTHZU)
- European Research Council under the European Union's Horizon 2020 Research and Innovation Program [682157]
- University of Pisa [PRIN 2017PHRM8X, PRA_2018_34]
This study demonstrates the successful synthesis of 2D WS2:Er nanosheets through rare earth element doping, which exhibit up-conversion and down-conversion emissions ranging from visible to near-infrared regions. The potential integration of these nanosheets in silicon platforms is also demonstrated by the realization of an infrared photodetector based on a WS2:Er/Si heterojunction.
The integration of 2D nanomaterials with silicon is expected to enrich the applications of 2D functional nanomaterials and pave the way for next-generation, nanoscale optoelectronics with enhanced performances. Herein, a strategy for rare earth element doping is utilized for the synthesis of 2D WS2:Er nanosheets to achieve up-conversion and down-conversion emissions ranging from visible to near-infrared regions. Moreover, the potential integration of the synthesized 2D nanosheets in silicon platforms is demonstrated by the realization of an infrared photodetector based on a WS2:Er/Si heterojunction. These devices operate at room temperature and show a high photoresponsivity of approximate to 39.8 mA W-1 (at 980 nm) and a detectivity of 2.79 x 10(10) cm Hz(1/2) W-1. Moreover, the dark current and noise power density are suppressed effectively by van der Waals-assisted p-n heterojunction. This work fundamentally contributes to establishing infrared detection by rare element doping of 2D materials in heterojunctions with Si, at the forefront of infrared 2DMs-based photonics.
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