DNA-CTMA/a-Si:H bio-hybrid photodiode: A light-sensitive photosensor |
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| Affiliation: | 1. LED-IT Fusion Technology Research Center, Yeungnam University, Gyeongsan 38541, South Korea;2. Department of Mechanical Engineering, Chadalawada Ramanamma Engineering College, Tirupati 517-506, India;3. School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, South Korea;1. Electronic Materials Research Group, School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia;2. Department of Electrical and Electronic Information Engineering, Graduate School of Engineering, Toyohashi University of Technology, Japan;1. Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC;2. Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/RXAS, Wright Patterson Air Force Base, OH 45433, USA;3. Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC;1. Department of Physics, University of Kerala, Kariavattom Campus, Thiruvananthapuram 695581, Kerala, India;2. Department of Physics, University College, Thiruvananthapuram 695034, Kerala, India;1. Department of Physics, Ananda College, Devakottai 630303, India;2. PG and Research Department of Physics, Arul Anandar College, Karumathur-625 514, India;3. Department of Nanotechnology, Noorul Islam Centre for Higher Education, Kumaracoil, Kanyakumari District, Tamil Nadu 629180, India;4. School of Sciences (Physics), National Institute of Technology Andhra Pradesh, Tadepalligudem 534101, India;5. Department of Physics, School of Physical Sciences, Central University of Rajasthan, Ajmer 305817, India;6. Advanced Functional Materials and Optoelectronic Laboratory (AFMOL), Department of Physics, College of Science, King Khalid University, Abha 61413, Saudi Arabia;7. Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia;8. Nanoscience Laboratory for Environmental and Bio-medical Applications (NLEBA), Semiconductor Lab., Metallurgical Lab.1, Physics Department, Faculty of Education, Ain Shams University, Roxy, 11757 Cairo, Egypt |
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| Abstract: | Recently, considerable interest have occurred in the development of an organic-inorganic-based bio-hybrid photodiodes (Bio-HPDs) with metal-free, eco-friendly, and cost-competitive features for light-sensitive devices. This paper reports a bio-inspired optical absorber material for the fabrication of Bio-HPDs using n-type hydrogenated amorphous silicon (a-Si:H) and a natural deoxyribonucleic acid (DNA)-cetyltrimethylammonium chloride (CTMA) biomaterial. a-Si:H is inexpensive and abundant, and DNA-CTMA is metal-free and eco-friendly. A DNA-CTMA coating on n-type a-Si:H leads to a chemically stable material with increased absorption and effective ties of dangling bonds and interface state density. Analysis results showed that the rectification ratio (RR) of the Bio-HPD is found to be 4 times higher than reference PD. This indicates that the effective RR is improved by the DNA-CTMA layer since it creates molecular charge interactions between DNA-CTMA layer and a-Si:H substrate. Moreover, Bio-HPD shows a light photosensitivity (Iphoto/Idark) of 474 with more reliable and has longer life time. In addition, the formation and feasible charge transport mechanisms are discussed. This biomaterial can be used for the development of commercially viable and environmentally safe large-scale Bio-HPDs applications. |
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| Keywords: | n-Schottky diode DNA Organic-inorganic structures Bio-hybrid photosensor Electrical and structural properties |
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