Synthesis and Photovoltaic Properties of Non-fullerene Solution Processable Small Molecule Acceptors

作     者：LI Hui LIU Zhao-yang ZHANG Xiao-yu YAO Shi-yu WEN Shan-peng TIAN Wen-jing 

作者机构：State Key Laboratory of Supramolecular Structure and Materials Jilin University Changchun 130012 P. R. China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2013年第29卷第3期

页      面：596-599页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 081704[工学-应用化学] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：Supported by the State Key Development Program for Basic Research of China(No.2009CB623605)  the National Natural Science Foundation of China(No.20874035)  the "111" Project of China(No.B06009) and the Project of Organic Polymer/ Inorganic Nanocomposite Solar Cell Materials of Jilin Province  China(No.20080305) 

主　　题：Non-fullerene small molecule Electron acceptor Bulk heterojunction 

摘      要：Two non-fullerene small molecules, BT-C6 and BT-C12, based on the vinylene-linked benzothiadiazole-thiophene（BT） moiety flanked with 2-（3,5,5-trimethylcyclohex-2-en-l-ylidene）malononitrile have been synthesized and characterized by solution/thin film UV-Vis absorption, photoluminescence（PL）, and cyclic voltammetry（CV） measurements. The two molecules show intense absorption bands in a wide range from 300 nm to 700 nm and low optical band- gaps for BT-C6（1.60 eV） and for BT-C12（1.67 eV）. The lowest unoccupied molecular orbital（LUMO） levels of both the molecules are relatively higher than that of [6,6]-phenyl C61 butyric acid methyl ester（PCBM）, promising high open circuit voltage（Voc） for photovoltaic application. Bulk heterojunction（BHJ） solar cells with poly（3-hexylthiophene） （P3HT） as the electron donor and the two molecules as the acceptors were fabricated. Under 100 mW/cm2 AM 1.5 G illumination, the devices based on P3HT：BT-C6（1：1, mass ratio） show a power conversion efficiency（PCE） of 0.67%, a short-circuit current（Jsc） of 1.63 mA/cm2, an open circuit voltage（Vow） of 0.74 V, and a fill factor（FF） of 0.56.