An energy cascading structure is designed in a polymer photovoltaic device to suppress recombination and improve quantum yields. By the insertion of a thin polymer interlayer with intermediate energy levels, electrons and holes can effectively shuttle away from each other while being spatially separated from recombination. An increase in open-circuit voltage and short-circuit current are observed in modified devices.

Additional Metadata
Publisher Weinheim: Wiley
Persistent URL dx.doi.org/10.1002/adma.201300243
Journal Adv. Mater.
Citation
Tan, Z. -K, Johnson, K, Vaynzof, Y, Bakulin, A. A, Chua, L. -L, Ho, P. K. H, & Friend, R. H. (2013). Suppressing Recombination in Polymer Photovoltaic Devices via Energy-Level Cascades. Adv. Mater., 25(30), 4131–4138. doi:10.1002/adma.201300243