城戸・笹部研究室の博士研究員 Daobin Yang 博士とスウェーデンはリンショーピング大学（Linköping University）Feng Gao 教授との非フラーレン系全低分子型有機薄膜太陽電池に関する共同研究論文「A minimal non-radiative recombination loss for efficient non-fullerene all-small-molecules organic solar cells with low energy loss of 0.54 eV and high open-circuit voltage of 1.15 V」と題する論文が英国化学会（The Royal Society of Chemistry）の Journal of Materials Chemistry A (IF: 8.867) に受理されました。
Title: A minimal non-radiative recombination loss for efficient non-fullerene all-small-molecules organic solar cells with low energy loss of 0.54 eV and high open-circuit voltage of 1.15 V
By D. Yang, Y. Wang, T. Sano, F. Gao, H. Sasabe, J. Kido, J. Mater. Chem. A 2018, accepted.
Abstract: Organic solar cells (OSCs) are considered as a promising next-generation photovoltaic technology because of their light weight, flexibility, and the potential of roll-to-roll fabrication. However, the relatively large energy loss (Eloss) from the optical bandgap (Eg) of the absorber to the open-circuit voltage (Voc) of the device hinders further improvement of the PCEs of OSCs. Here, we report efficient non-fullerene all-small-molecules organic solar cells (NF all-SMOSCs), using DR3TBDTT and O-IDTBR as donor and acceptor, respectively. We obtain a high electroluminescence yield value of up to of ~4 ×10-4 corresponding to a 0.21 eV non-radiative recombination energy loss, which is the smallest value for bulk-heterojunction (BHJ) OSCs so far. As a result, a low of 0.54 eV and a considerably high Voc of 1.15 V are obtained for BHJ NF all-SMOSCs.