Highly sensitive full solar-blind ultraviolet spectrum detection and imaging based on PdSe<sub>2</sub>/Ga<sub>2</sub>O<sub>3</sub> vdW heterojunction
Solar-blind ultraviolet (UV) photodetectors are in great demand for both military and civilian applications. Here, we have successfully demonstrated the synthesis of the Sn-doped Ga<sub>2</sub>O<sub>3</sub> films with controllable bandgaps to construct PdSe<sub>2</sub>/Ga<sub>2</sub>O<sub>3</sub> van der Waals (vdW) heterojunctions achieving highly sensitive full solar-blind UV spectrum detection. The assembled device demonstrates a full solar-blind UV spectral self-powered response, with a large responsivity of 123.5 mA/W, a high specific detectivity of 1.63 × 10<sup>13</sup> Jones, and a rapid response time of 0.15/2.3 ms. Importantly, an outstanding solar-blind UV imaging application based on an integrated PdSe<sub>2</sub>/Ga<sub>2</sub>O<sub>3</sub> device array has been demonstrated. Our work paves a feasible path toward achieving highly sensitive solar-blind UV detecting and imaging based on wide-bandgap Ga<sub>2</sub>O<sub>3</sub> films.
Authors
- Kunxuan Liu
- Ranran Zhuo
- Longhui Zeng (ORCID: https://orcid.org/0000-0003-2742-4711)
- Pei Lin (ORCID: https://orcid.org/0000-0002-3300-5241)
- Di Wu (ORCID: https://orcid.org/0000-0003-3266-0612)
- Xinjian Li (ORCID: https://orcid.org/0000-0002-1172-0041)
- Xin‐Hua Hu (ORCID: https://orcid.org/0000-0001-5038-7651)
- Xiaolin Cao (ORCID: https://orcid.org/0000-0001-7442-9211)
- Zhifeng Shi (ORCID: https://orcid.org/0000-0003-1719-0456)
- Zhiman Zhou
Institutions
- University of California San Diego (US)
- Zhengzhou University (CN)
Publication Details
- Journal
- Optics Letters
- Published
- 2024-08-26
- DOI
- https://doi.org/10.1364/ol.532885
- Citations
- 18
- Primary Topic
- Ga2O3 and related materials
- Type
- article
- Field-Weighted Citation Impact
- 2.12
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China