Ultrasensitive self-powered large area planar GaN UV-photodetector using reduced graphene oxide electrodes
IR@NPL: CSIR-National Physical Laboratory, New Delhi
View Archive Info| Field | Value | |
| Title |
Ultrasensitive self-powered large area planar GaN UV-photodetector using reduced graphene oxide electrodes
|
|
| Creator |
Prakash, Nisha
Singh, Manjri Kumar, Gaurav Barvat, Arun Anand, Kritika Pal, Prabir Singh, Surinder P. Khanna, Suraj P. |
|
| Subject |
Applied Physics/Condensed Matter
|
|
| Description |
A simplistic design of a self-powered UV-photodetector device based on hybrid reduced-graphene-oxide (r-GO)/gallium nitride (GaN) is demonstrated. Under zero bias, the fabricated hybrid photodetector shows a photosensivity of similar to 85% while the ohmic contact GaN photodetector with an identical device structure exhibits only similar to 5.3% photosensivity at 350 nm illumination (18 mu W/cm(2)). The responsivity and detectivity of the hybrid device were found to be 1.54mA/W and 1.45 x 10(10) Jones (cm Hz(1/2) W-1), respectively, at zero bias with fast response (60 ms), recovery time (267 ms), and excellent repeatability. Power density-dependent responsivity and detectivity revealed ultrasensitive behaviour under low light conditions. The source of the observed self-powered effect in the hybrid photodetector is attributed to the depletion region formed at the r-GO and GaN quasi-ohmic interface.
|
|
| Publisher |
AIP Publishing
|
|
| Date |
2016-12-12
|
|
| Type |
Article
PeerReviewed |
|
| Format |
application/pdf
|
|
| Identifier |
http://npl.csircentral.net/2406/1/Ultrasensitive%20self-powered.pdf
Prakash, Nisha and Singh, Manjri and Kumar, Gaurav and Barvat, Arun and Anand, Kritika and Pal, Prabir and Singh, Surinder P. and Khanna, Suraj P. (2016) Ultrasensitive self-powered large area planar GaN UV-photodetector using reduced graphene oxide electrodes. Applied Physics Letters, 109 (24). ISSN 0003-6951 |
|
| Relation |
http://npl.csircentral.net/2406/
|
|