Dual functional photo-response for p-Si/SiO2/n-InGaZnO graphene nanocomposites photodiodes. (11th October 2018)

• Record Type: Journal Article
• Authors: Huang, Chun-Ying; Chen, Ming-Liang; Yu, Chun-Wei; Wan, Tsung-Chih; Chen, Shih-Hsuan; Chang, Chia-Yu; Hsu, Tzu-Yang
• Is Part Of: Nanotechnology. Volume 29:Number 50(2018)
• Publication Date: 2018-10-11
• Subjects: graphene -- persistent photocurrent -- InGaZnO -- photodiodes; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aae474
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: 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.