Ultraviolet photodetector using pn junction formed by transferrable hollow n-TiO₂ nano-spheres monolayeropen access
- Authors
- Yang, Taeyoung; Park, Seong-jin; Kim, Taek Gon; Shin, Dong Su; Suh, Kyung-do; Park, Jinsub
- Issue Date
- Dec-2017
- Publisher
- OPTICAL SOC AMER
- Citation
- OPTICS EXPRESS, v.25, no.25, pp.30843 - 30850
- Indexed
- SCIE
SCOPUS
- Journal Title
- OPTICS EXPRESS
- Volume
- 25
- Number
- 25
- Start Page
- 30843
- End Page
- 30850
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/18602
- DOI
- 10.1364/OE.25.030843
- ISSN
- 1094-4087
- Abstract
- We report an ultraviolet (UV) photodetector with a universally transferable monolayer film with ordered hollow TiO2 spheres on p-GaN. After forming a TiO₂ monolayer film by unidirectional rubbing of hollow TiO2 spheres on a polydimethylsiloxane (PDMS) supporting plate, we used a 5% polyvinyl alcohol (PVA) aqueous solution to transfer the film onto the target substrate. The PVA/TiO2 monolayer film was detached from the PDMS film and transferred to the p-GaN/Al₂O₃ substrate. To investigate the effects of crystallized phases of the TiO₂ hollow spheres, anatase and rutile TiO₂ sphere monolayers prepared by combining template synthesis and thermal treatment. The responsiveness of the UV photodetectors using anatase and rutile hollow n-TiO₂ monolayer/p-GaN was 0.203 A/W at 312 nm and 0.093 A/W at 327 nm, respectively.
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