Journal
NANOTECHNOLOGY
Volume 29, Issue 50, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aae474
Keywords
graphene; persistent photocurrent; InGaZnO; photodiodes
Funding
- Ministry of Science and Technology of Taiwan [MOST 106-2218-E-260-001-MY3]
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This study demonstrates dual functional hybrid heterojunction photodiodes (PDs) that comprise an amorphous indium gallium zinc oxide (a-IGZO) thin film blended with graphene nanoflakes and a SiO2(5 nm)/Si substrate. The PDs exhibit a photo-responsivity of approximately 0.15-0.27 A W-1 under 633 nm illumination, which is much higher than that for a-IGZO based phototransistor in the visible region. The device also gives a long-lasting persistent photocurrent (PPC) when the UV light is extinguished. This results show that the hybrid heterojunction acts as a high performance photodetector for the detection of visible light and provides a universal scenario for development of PPC.
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