Sai-Wing Tsang, Song Chen and Franky So Energy Level Alignment and Sub-Bandgap Charge Generation in Polymer:Fullerene Bulk Heterojunction Solar Cells (Adv. Mater. 17/2013) Advanced Materials 25
A novel technique – charge modulated electro-absorption spectroscopy (CEMAS) – is reported by Franky So and co-workers on page 2434 and used to determine the energy-level alignment and the effective bandgap of organic heterojunctions. What makes CMEAS unique is that it can directly determine the interface energetics of donor–acceptor blends, not possible using conventional electro-chemical methods.
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