Synthesis of Anthracene-Based Donor鈥揂cceptor Copolymers with a Thermally Removable Group for Polymer Solar Cells
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- 作者：Chunchen Liu ; Wenzhan Xu ; Xing Guan ; Hin-Lap Yip ; Xiong Gong ; Fei Huang ; Yong Cao
- 刊名：Macromolecules
- 出版年：2014
- 出版时间：December 23, 2014
- 年：2014
- 卷：47
- 期：24
- 页码：8585-8593
- 全文大小：547K
- ISSN：1520-5835
文摘
A highly soluble anthracene cyclic adduct with a thermally cleavable substituent was synthesized, and it was used as a donor unit in a series of donor鈥揳cceptor type conjugated copolymers with improved processability. The removable group was eliminated under elevated temperature through retro Diels鈥揂lder reaction, which offered the corresponding copolymers with better planarity and rigidity. Thermogravimetric analysis (TGA), FT-IR, and UV鈥搗is spectroscopy were carried out to study the thermal cleavage process. Uniform films were easily formed from these precursor copolymers due to their good solution processabilty. Polymer solar cells were successfully fabricated through applying thermal annealing treatment on the blend films that were spin-coated from solutions of the precursor copolymers blended with fullerene derivatives. The best polymer solar cell device with a power conversion efficiency (PCE) of 2.15% was achieved based on copolymer PCOAEHDPP.