Effect of acceptor strength in new acceptor–donor–acceptor-type molecules on their miscibility with donor polymers for bulk-heterojunction fullerene-free solar cells
作者:Seo Yeon Park、Gi Eun Park、Suna Choi、Ji Hyung Lee、Dae Hee Lee、Min Ju Cho、Dong Hoon Choi
DOI:10.1016/j.dyepig.2017.07.010
日期:2017.11
91 eV for SP-IC and −3.97 eV for SP-TCF) are suitable as n-type molecules for PTB7-Th-based polymer solar cells. However, their morphologies in blend films with a conjugated donor polymer, Poly([2,6′-4,8-di(5-ethylhexylthienyl)benzo[1,2-b;3,3-b]dithiophene]3-fluoro-2[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl}) (PTB7-Th), exhibited considerable differences. The PTB7-Th:SP-IC blend film exhibited
我们设计并合成了两种基于螺二芴(SP)的受体-施主-受体(A–D–A)型受体材料,分别用SP-IC和SP-TCF表示,它们的A–D–A结构包括3D四硫代螺螺双芴供体核心和2-(3-氧代-2,3-二氢-1 H-茚满-1-亚甲基)丙二腈(IC)或2-(3-氰基-4,5,5-三甲基呋喃-2 (5小时)-亚丙基)丙二腈(TCF)受体分别作为末端单元。它们的LUMO水平(对于SP-IC为-3.91 eV,对于SP-TCF为-3.97 eV)适合作为基于PTB7-Th的聚合物太阳能电池的n型分子。然而,它们在共轭施主聚合物,聚([2,6'-4,8-二(5-乙基己基噻吩基)苯并[1,2-b; 3,3-b]二噻吩] 3-氟-2 [(2-乙基己基)羰基]噻吩并[3,4-b]噻吩二基})(PTB7-Th)表现出相当大的差异。PTB7-Th:SP-IC混合膜比PTB7-Th:SP-TCF混合膜表现出更好的