Figure 6.

I-V characteristics of n-ZnO NRs/p+-Si heterojunction. (a) 200°C, (b) 400°C, (c) 600°C, and (d) 800°C. The turn-on voltage were 9.8, 3.7, 3.2, and 3.1 V, respectively.

Tsai et al. Nanoscale Research Letters 2012 7:664   doi:10.1186/1556-276X-7-664
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