A highly sensitive, large area, and self-powered UV photodetector based on coalesced gallium nitride nanorods/graphene/silicon (111) heterostructure
Type
ArticleAuthors
Zulkifli, Nur 'Adnin AkmarPark, Kwangwook

Min, Jung-Wook
Ooi, Boon S.

Zakaria, Rozalina

Kim, Jongmin
Tan, Chee Leong

KAUST Department
Photonics LaboratoryElectrical Engineering Program
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Date
2020-11-13Online Publication Date
2020-11-13Print Publication Date
2020-11-09Embargo End Date
2021-11-13Submitted Date
2020-06-12Permanent link to this record
http://hdl.handle.net/10754/665951
Metadata
Show full item recordAbstract
In this paper, we demonstrate an ultraviolet photodetector (UV-PD) that uses coalesced gallium nitride (GaN) nanorods (NRs) on a graphene/Si (111) substrate grown by plasma-assisted molecular beam epitaxy. We report a highly sensitive, self-powered, and hybrid GaN NR/graphene/Si (111) PD with a relatively large 100 mm2 active area, a high responsivity of 17.4 A/W, a high specific detectivity of 1.23 1013 Jones, and fast response speeds of 13.2/13.7 ls (20 kHz) under a UV light of 355 nm at zero bias voltage. The results show that the thin graphene acts as a perfect interface for GaN NRs, encouraging growth with minimum defects on the Si substrate. Our results suggest that the GaN NR/graphene/Si (111) heterojunction has a range of interesting properties that make it well-suited for a variety of photodetection applications.Citation
Zulkifli, N. ’Adnin A., Park, K., Min, J.-W., Ooi, B. S., Zakaria, R., Kim, J., & Tan, C. L. (2020). A highly sensitive, large area, and self-powered UV photodetector based on coalesced gallium nitride nanorods/graphene/silicon (111) heterostructure. Applied Physics Letters, 117(19), 191103. doi:10.1063/5.0018076Sponsors
The authors extend special thanks to Dr. Mohammad Khaled Shakfa and Ram Chandra Subedi of the Photonics Laboratory, King Abdullah University of Science and Technology, Saudi Arabia, for their useful discussions and PL measurement. The authors declare that they have no competing financial interest. R. Zakaria and N. A. A. Zulkifli would like to acknowledge support from the University of Malaya (No. IIRG03–2019). K. Park would like to acknowledge support from the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIT) (No. NRF2020R1F1A1070471).Publisher
AIP PublishingJournal
Applied Physics LettersAdditional Links
http://aip.scitation.org/doi/10.1063/5.0018076ae974a485f413a2113503eed53cd6c53
10.1063/5.0018076