Design,Synthesis And Performance Research Of Acceptor Material Base On PCBM And MDNC Derivatives

Polymer solar cells(PSCs) have already become hot spot and important developing direction in many areas due to their advantages of compound structure designability, light weight, low cost, and flexibility. The fullerene derivative is used as the excellent electron acceptor for PSCs, and the development of highly efficient fullerene acceptors has become the hot research field in recent years. To further improve the PCE, substantial research has focused on finding a new acceptor material with broad absorption, high LUMO energy level and electron mobility with suitable electron energy level, and then to improve the short circuit current(Jsc) and a higher open circuit voltage(Voc).In this paper, we have designed two types of fullerene derivatives basing on PCBM ? ICBA ? QDNC. The one was PCBM analog, the one was fullerene bisadducts, including MDN-PCBM and MDN-ICMA. In order to scan molecular with excellent performance, we have calculated their HOMO and LUMO by Dmol3 method and compared with PCBM. The PCBM analogues were synthesized with glutaric anhydride, 4-Methylbenzenesulfonhydrazide, fullerene(C60) and several alcohols as primary substances, and fullerene bisadducts,including MDN-PCBM and MDN-ICMA were synthesized with PCBM, ICMA,and 3, 4-bis-(bromomethyl) methoxybenzene. The structures of compounds were characterized by UV-vis, FT-IR, 1H NMR, 13 C NMR, MS and elemental analysis techniques, the results showed that the target products and intermediates were the aim compounds. PSCs with P3 HT as a donor and F1–F6 as acceptors displayed different photovoltaic properties, and the the PCE values of PSCs are 2.94%,3.19%, 3.33%, 1.24%, 0.96%, and 1.97%, respectively. The PSCs with F1, F2,and F3 as acceptors showed higher photovoltaic performance than those with F4,F5 and F6 as acceptors. The PSCs based on P3HT/MDN-PCBM shows a higher PCE of 3.67 % than P3HT/PCBM, but P3HT/MDN-ICMA shows a lower PCE of1.68 % than P3HT/PCBM.