Abstract
A photodiode was fabricated based on well-aligned ZnO nanowire arrays (ZNAs) and regioregular poly(3-hexylthiophene-2,5-diyl) (P3HT) hybrid heterojunction. The current–voltage (I–V) characteristics of ITO/ZNAs/P3HT/Ag device in the dark and under illumination with a solar simulator were investigated in detail. The results demonstrated that the device showed good diode characteristics in the dark and under illumination. The device exhibited a high rectification ratio (RR) of 3211 at 2 V and a low turn-on voltage of 0.5 V in the dark. Also, the RR of the device as a function of illumination intensity was observed, and the transportation process of charge carriers in the diode under illumination was illuminated in terms of energy band diagram.
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Acknowledgements
This work was partially supported by the National Science Foundation of China (NSFC) (Grant No. 60736005 and 60425101-1), the Foundation for Innovative Research Groups of the NSFC (Grant No. 60721001), Provincial project (Grant No. 9140A02060609DZ0208), SRF for ROCS, SEM (Grant No.GGRYJJ08-05), and Young Excellent Project of Sichuan Province (Grant No. 09ZQ026-074).
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Yuan, Z., Yu, J., Ma, W. et al. A photodiode with high rectification ratio based on well-aligned ZnO nanowire arrays and regioregular poly(3-hexylthiophene-2,5-diyl) hybrid heterojunction. Appl. Phys. A 106, 511–515 (2012). https://doi.org/10.1007/s00339-011-6756-7
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DOI: https://doi.org/10.1007/s00339-011-6756-7