D. C. Olson, S. E. Shaheen, M. S. White, W. J. Mitchell, M. F. A. M. van Hest, R. T. Collins and D. S. Ginley Band-Offset Engineering for Enhanced Open-Circuit Voltage in Polymer–Oxide Hybrid Solar Cells Advanced Functional Materials 17
Substitution of magnesium into a zinc oxide acceptor (Zn1–xMgxO) results in a simple method to systematically tune the band offset in a p-conjugated polymer–metal oxide hybrid donor– acceptor system in order to maximize the VOC (see figure). The VOC is seen to increase from 500 mV at x = 0 up to values in excess of 900 mV at x = 0.35. This work provides a tool to understand the role of the donor–acceptor band offset in hybrid photovoltaics.
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