Strain-Enhanced Responsivity of Scalable and Flexible Diamond UV Detector
In this letter, we present scalable and flexible diamond UV detectors. A 2-inch, 1-<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu $ </tex-math></inline-formula>m-thick diamond film is exfoliated from its heteroepitaxial silicon substrate and transferred to a soft PDMS substrate, forming the foundation for the flexible detector. Measurement under strains of 0%, 0.6%, and 1.2% reveals a decrease in the bandgap of diamond film from 5.31 eV to 5.18 eV and 5.06 eV, respectively. This strain-induced narrowing of the bandgap improves the responsivity of diamond detectors under UV illumination. The elastic strain engineering on diamonds, being simple and effective, provides a new route to improve the performance of diamond UV detectors, promising to accelerate the development of next-generation flexible diamond electronics.
Authors
- Yumeng Luo (ORCID: https://orcid.org/0000-0002-4135-3801)
- Kwai Hei Li (ORCID: https://orcid.org/0000-0002-0520-1632)
- Zhiqin Chu (ORCID: https://orcid.org/0000-0003-4671-5434)
- Qi Wang (ORCID: https://orcid.org/0000-0001-7129-1974)
- Yicheng Wang (ORCID: https://orcid.org/0000-0001-5388-3052)
- Jixiang Jing
- Zhongqiang Wang (ORCID: https://orcid.org/0000-0002-7069-2116)
Institutions
- Peking University (CN)
- Southern University of Science and Technology (CN)
- University of Hong Kong (HK)
Publication Details
- Journal
- IEEE Electron Device Letters
- Published
- 2025-01-27
- DOI
- https://doi.org/10.1109/led.2025.3535477
- Citations
- 4
- Primary Topic
- Diamond and Carbon-based Materials Research
- Type
- article
- Field-Weighted Citation Impact
- 2.07
Funders
- Shenzhen Fundamental Research Program