3 years ago

A Perylene-Based Polycyclic Aromatic Hydrocarbon Electron Donor for a Highly Efficient Solar Cell Dye

A Perylene-Based Polycyclic Aromatic Hydrocarbon Electron Donor for a Highly Efficient Solar Cell Dye
Yi Yuan, Peng Wang, Heng Wu, Jing Zhang, Linrui Jin, Junting Wang
The continuing efforts to develop novel polycyclic aromatic hydrocarbons and exploit them as building blocks to create organic donor–acceptor (D–A) dyes with impressive excited-state features should offer an excellent means by which to improve the power conversion efficiency (PCE) of dye-sensitized solar cells (DSSCs). To this end, a nonacyclic aromatic hydrocarbon, N-annulated benzoindenopentaphene (NBIP) was tethered with multiple solubilizing groups, including NBIPs with one 2-hexyldecyl, with one 2-hexyldecyloxy, and with four 4-hexylphenyl substituents. The side- and end-chain-functionalized NBIPs can be conveniently prepared in excellent yield, and further cross-coupled with 4-(7-ethynylbenzo[c][1,2,5]thiadiazol-4-yl)benzoic acid to afford a metal-free D–A dye, which achieves a high power conversion efficiency of 12.6 % under AM1.5G illumination in DSSCs without need for any coadsorbent. Scenes of mild perylene: Polycyclic aromatic hydrocarbons can be used as building blocks to create organic donor–acceptor (D–A) dyes, which offer an improvement in the power conversion efficiency (PCE) of dye-sensitized solar cells. N-annulated benzoindenopentaphene tethered with multiple solubilizing groups cross-coupled with 4-(7-ethynylbenzo[c][1,2,5]thiadiazol-4-yl)benzoic acid affords a D–A dye with a high PCE of 12.6 %.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/cssc.201700916

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