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Novel wide band gap copolymers featuring excellent comprehensive performance towards practical application for organic solar cells.

Abstract

In the past decades, extensive efforts have been devoted to improve the power conversion efficiencies (PCEs) of organic solar cells (OSCs), while its comprehensive performance including high efficiency, fulfilling the prerequisites of solution printing technology (active layer thickness > 200 nm) and long term thermal stability, which are essential for practical application for OSCs, have not been paid adequate attention yet. In this communication, two novel wide band gap (WBG) polymers of PBTIBDTT and PBTIBDTT-S were designed and synthesized. PBTIBDTT device exhibits a high PCE of 9.42%, which is one of the highest values reported for OSCs fabricated from WBG materials and the PCEs could retain above 8.6% as the active layer thickness further increased to 280 nm. More importantly, the device displays remarkable thermal stability for 120 hours at 100 oC. To the best of our knowledge, it is the first time to report a WBG material that features excellent comprehensive performance, which would open a new avenue to design meaningful conjugated copolymers towards future practical application.

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Publication details

The article was received on 24 Apr 2017, accepted on 09 Jun 2017 and first published on 12 Jun 2017


Article type: Communication
DOI: 10.1039/C7PY00689F
Citation: Polym. Chem., 2017, Accepted Manuscript
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    Novel wide band gap copolymers featuring excellent comprehensive performance towards practical application for organic solar cells.

    D. Yang, Z. Li, Z. Li, X. Zhao, T. Zhang, F. Wu, Y. Tian, F. Ye, Z. Sun and X. Yang, Polym. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7PY00689F

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