Application of Small Molecule Donor Materials Based on Phenothiazine Core Unit in Bulk Heterojunction Solar Cells
journal contributionposted on 31.07.2014 by Qin Tan, Xichuan Yang, Ming Cheng, Haoxin Wang, Xiuna Wang, Licheng Sun
Any type of content formally published in an academic journal, usually following a peer-review process.
A D-π-A type small molecule PTZ1 and an A-π-D-π-A type small molecule PTZ2 with phenothiazine as the central building block and dicyanovinyl as the electron-withdrawing end-group have been designed and synthesized. Compared with D-π-A type donor material PTZ1, the donor material PTZ2 with A-π-D-π-A configuration shows much wider response to solar light. The donor material PTZ1 possesses more positive highest occupied molecular orbital level, and higher Voc was obtained for devices with PTZ1/PC71BM blend as the active layer. An improved efficiency of 3.25% was obtained for the PTZ2/PC71BM based solar cells.