National Center for Nanoscience and Technology, Beijing, 100190, China.
Macromol Rapid Commun. 2014 Aug;35(15):1362-6. doi: 10.1002/marc.201400196. Epub 2014 May 12.
Pentacyclic lactam acceptor unit TPTI invented by our group is proved to be a good building block for efficient D-A copolymers used in organic solar cells. Here, two D-A copolymers PBTTPTI and PTTTPTI are developed by copolymerizing TPTI with 2,2'-bithiophene (BT) or thieno[3,2-b]thiophene (TT). PBTTPTI and PTTTPTI exhibit good solubility and strong interchain π-π interaction even in dilute solution. They possess deep HOMO levels (ca. -5.3 eV), partial crystallinity, and good hole mobilities. Blending with PC71 BM, PBTTPTI and PTTTPTI give decent power conversion efficiencies (PCE) up to 6.83% and 5.86%, with outstanding fill factors (FF) of 74.3% and 71.3%, respectively.
我们小组发明的五环内酰胺受体单元 TPTI 被证明是用于有机太阳能电池的高效 D-A 共聚物的良好构建块。在这里，通过将 TPTI 与 2,2'-联噻吩 (BT) 或噻吩[3,2-b]噻吩 (TT) 共聚，开发了两种 D-A 共聚物 PBTTPTI 和 PTTTPTI。PBTTPTI 和 PTTTPTI 即使在稀溶液中也表现出良好的溶解性和强的分子间 π-π 相互作用。它们具有深的 HOMO 能级（约-5.3 eV）、部分结晶性和良好的空穴迁移率。与 PC71BM 共混时，PBTTPTI 和 PTTTPTI 的功率转换效率（PCE）分别高达 6.83%和 5.86%，填充因子（FF）分别高达 74.3%和 71.3%。
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