Research Papers

Fabrication of hybrid ultraviolet photodetector using organic polymer thin-film-coated TiO2 nanowires

[+] Author Affiliations
Saptadip Saha, Priyanath Das, Ajoy Kumar Chakraborty, Sharmistha Sarkar, Ruchira Debbarma

National Institute of Technology Agartala, Department of Electrical Engineering, Jirania, Agartala, West Tripura 799046, India

J. Nanophoton. 10(2), 026011 (May 02, 2016). doi:10.1117/1.JNP.10.026011
History: Received December 10, 2015; Accepted April 11, 2016
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Abstract.  Poly (methyl methacrylate) (PMMA) thin film (TF) was employed on TiO2 nanowires (NWs) to fabricate organic–inorganic hybrid UV photodetector (PD), and its properties were studied and compared with bare TiO2 NW-based PD. A maximum photoresponsivity of 20×103  A/W and a maximum external quantum efficiency of 3.15% were observed in the UV region at 370 nm (3.35  eV). Enhanced photon absorption was observed in the hybrid detector. The TF of PMMA, which is a π-conjugated polymer, increased the carrier lifetime and reduced recombination rate. The PMMA TF:TiO2 NWs hybrid UV detector shows excellent rectification, and light current/dark current ratio was measured to be 1.46 times in comparison to bare TiO2 NWs photodetector in the reverse bias condition from 1 to 10  V.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Saptadip Saha ; Priyanath Das ; Ajoy Kumar Chakraborty ; Sharmistha Sarkar and Ruchira Debbarma
"Fabrication of hybrid ultraviolet photodetector using organic polymer thin-film-coated TiO2 nanowires", J. Nanophoton. 10(2), 026011 (May 02, 2016). ; http://dx.doi.org/10.1117/1.JNP.10.026011


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