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Fabrication of novel transparent Co3O4-TiO2 nanowires p-n heterojunction diodes for multiband photodetection applications

Choudhuri, Bijit; Mondal, Aniruddha; Dwivedi, Shyam Murli Manohar Dhar; Henini, Mohamed

Authors

Bijit Choudhuri

Aniruddha Mondal

Shyam Murli Manohar Dhar Dwivedi

Mohamed Henini



Abstract

Axial Co3O4 - TiO2 heterojunction nanowires (NWs) were synthesized by glancing angle deposition (GLAD) technique. The p-n heterojunction showed excellent rectification ratio of 2.26 × 102 at ± 3.4 V. The forward turn on voltage of 1.5 V in the dark was reduced to 1 V under white light excitation on the device. The diode showed a maximum half-wave rectification efficiency of 7.77% at 200 Hz frequency operated with maximum ±10 V. The device showed maximum peak responsivity of 4.01 A/W and internal gain of 13.1 at 380 nm wavelength. The detectivity was calculated to be 2.82 × 1011 and 1.69 × 1011 Jones and the noise equivalent power was estimated to be 14.9 and 24.8 pW at 380 and 620 nm wavelength, respectively. The device spatial response showed sharp transition with rise and fall time of ∼0.17s and 0.21s, respectively.

Journal Article Type Article
Publication Date Jul 25, 2017
Journal Journal of Alloys and Compounds
Print ISSN 0925-8388
Electronic ISSN 1873-4669
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 712
APA6 Citation Choudhuri, B., Mondal, A., Dwivedi, S. M. M. D., & Henini, M. (2017). Fabrication of novel transparent Co3O4-TiO2 nanowires p-n heterojunction diodes for multiband photodetection applications. Journal of Alloys and Compounds, 712, https://doi.org/10.1016/j.jallcom.2017.04.068
DOI https://doi.org/10.1016/j.jallcom.2017.04.068
Keywords Semiconductors; Optical materials; Oxide materials; Thin films; Electron-phonon interactions; Photoconductivity and photovoltaics
Publisher URL http://www.sciencedirect.com/science/article/pii/S0925838817312598
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0





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