Journal article
A Highly Sensitive Graphene-Organic Hybrid Photodetector with a Piezoelectric Substrate
Advanced functional materials, v 24(43), pp 6818-6825
19 Nov 2014
Abstract
To create a sensitive photodetector, the transparent and conductive properties of graphene and the optical and photovoltaic properties of poly(3-hexylthiophene) (P3HT) are combined as a hybrid composite. Based on the inherent nature of the band alignment between graphene and P3HT, the photogenerated holes are able to transfer to the graphene layer and improve the photoresponse to be much better than the traditional layer by layer organic system. Additionally, the graphene is deposited on a piezoelectric Pb(Zr0.2Ti0.8)O-3 (PZT) substrate, and the photoresponse of such composite photodetectors is found to be ten times larger than on SiO2 base. It is demonstrated that the electric field of the polarization of piezoelectric substrate helps the spatial separation of photogenerated electrons and holes and promotes the hole doping of graphene to enhance the photoconduction. A detailed investigation of graphene layers, thickness of P3HT and time evolution shows that the composite of graphene and P3HT on PZT can be used as a sensitive photodetector and has potential as an effective solar cell. Moreover, with the replacement of P3HT by a thin layer of bulk heterojunction of polymer and fullerene, the photosensitivity can be further increased by more than one order of magnitude.
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Details
- Title
- A Highly Sensitive Graphene-Organic Hybrid Photodetector with a Piezoelectric Substrate
- Creators
- Wei-Chun Tan - National Taiwan UniversityWei-Heng Shih - Drexel UniversityYang Fang Chen - National Taiwan University
- Publication Details
- Advanced functional materials, v 24(43), pp 6818-6825
- Publisher
- Wiley
- Number of pages
- 8
- Grant note
- Ministry of Education of the Republic of China; Ministry of Education, Taiwan National Science Council; Ministry of Science and Technology, Taiwan
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000345225800009
- Scopus ID
- 2-s2.0-84961290860
- Other Identifier
- 991019167528104721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter