Jana, Arpita and Ghosh, Siddhartha and Sujatha Devi, P and Bandyopadhyay, Nil Ratan and Ray, Mallar (2014) Tunable charge transport through n-ZnO nanorods on Au coated macroporous p-Si. Journal of Materials Chemistry C, 2 (45). pp. 9613-9619. ISSN 2050-7526

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We report a strategy to synthesize patterned n-ZnO nanorods on Au coated macroporous p-Si. Electric field assisted growth of ZnO under UV exposure results in the formation of well-aligned and relatively defect-free n-ZnO nanorods on the macroporous Si-template. The luminescence characteristics of ZnO exhibit a single Gaussian peak due to band-to-band transition in ZnO. Temperature dependent electrical transport through the n-ZnO/Au/p-Si heterojunction reveals unusual characteristics. Under forward bias, the I-V plots are diode-like with a remarkably low turn-on voltage and significantly high forward bias current. The non-linear forward current decreases appreciably with temperature while the reverse bias current is linear and is almost temperature independent. The Au layer present between the n-ZnO and p-Si significantly modifies the junction and allows tuning the device characteristics from diode-like to ohmic under different biasing conditions.

Item Type: Article
Subjects: Engineering Materials
Divisions: Nano-Structured Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 17 Feb 2015 07:09
Last Modified: 17 Feb 2015 07:09
URI: http://cgcri.csircentral.net/id/eprint/2700

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