A novel solution-processable electron acceptor based on diketopyrrolopyrrole and benzothiadiazole building blocks was designed and synthesized, which exhibited excellent solubility and thermal stability, and afforded 1.16 power conversion efficiency with high open-circuit voltage (1.08 V) when tested with the classical poly(3-hexylthiophene) electron donor in bulk-heterojunction solar cells. The open-circuit voltage reported here ( 1.1 V) is among the highest values for a single bulk-heterojunction device.
Raynor, A., Gupta, A., Patil, H., Bilic, A., & Bhosale, S. V. (2014). A diketopyrrolopyrrole and benzothiadiazole based small molecule electron acceptor: Design, synthesis, characterization and photovoltaic properties. RSC Advances, 4(101), 57635 - 57638. https://doi.org/10.1039/c4ra09668a