Deep-ultraviolet photodetector based on exfoliated n-type beta-Ga2O3 nanobelt/p-Si substrate heterojunction
- Authors
- Shin, Gahyun; Kim, Hong-Yeol; Kim, Jihyun
- Issue Date
- 2월-2018
- Publisher
- KOREAN INSTITUTE CHEMICAL ENGINEERS
- Keywords
- beta-Ga2O3; Nanobelt; Solar-blind Photodiode; p-n Heterojunction; van der Waals Interaction
- Citation
- KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.35, no.2, pp.574 - 578
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- KOREAN JOURNAL OF CHEMICAL ENGINEERING
- Volume
- 35
- Number
- 2
- Start Page
- 574
- End Page
- 578
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/77479
- DOI
- 10.1007/s11814-017-0279-7
- ISSN
- 0256-1115
- Abstract
- Low-dimensional semiconductor p-n junctions as components for optoelectronic devices are considered to be more promising than thin film equivalents. We fabricated heterojunction p-n solar blind photodiodes with the configuration of n-type beta-Ga2O3 nanobelts contacted onto p-Si substrates. The junction between beta-Ga2O3 and Si was formed by van der Waals interactions. The fabricated heterojunction p-n diodes exhibited typical rectifying current-voltage characteristics, with a rectification ratio as high as 1.56x10(4) at +/- 20 V and an ideality factor of approximately eight. Photoresponsive measurements showed that the heterojunction p-n diodes had a high sensitivity and selectivity for light at a wavelength of 254 nm, with fast response and decay characteristics. For the fast-response components, the response time constant was 4.06 s and the decay time constant was 0.16 s. The exfoliated beta-Ga2O3 nanobelt/Si p-n heterojunction presented here constitutes a functional unit for low-dimensional ultra-wide bandgap electronic and optoelectronic devices.
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