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

Saptadip Saha; Priyanath Das; Ajoy Kumar Chakraborty; Sharmistha Sarkar; Ruchira Debbarma

doi:10.1117/1.JNP.10.026011

2 May 2016 Fabrication of hybrid ultraviolet photodetector using organic polymer thin-film-coated TiO₂ nanowires

Saptadip Saha, Priyanath Das, Ajoy Kumar Chakraborty, Sharmistha Sarkar, Ruchira Debbarma

Author Affiliations +

Journal of Nanophotonics, Vol. 10, Issue 2, 026011 (May 2016). https://doi.org/10.1117/1.JNP.10.026011

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 20×10−³ 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.

Citation Download 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," Journal of Nanophotonics 10(2), 026011 (2 May 2016). https://doi.org/10.1117/1.JNP.10.026011

Published: 2 May 2016

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