基于吡咯并吡咯二酮的双节棍型小分子的合成及光伏性能研究  

Synthesis and Photovoltaic Properties of Two Knot Rod Small Molecules Based on Pyrrolopyridone

作　　者：孙道通 李宇翔 赵宝峰 秦红梅 SUN Daotong;LI Yuxiang;ZHAO Baofeng;QIN Hongmei(School of Materials Science and Engineering,Xi′an University of Science and Technology,Xi′an 710054,China;State Key Laboratory of Fluorine&Nitrogen Chemicals,Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)

机构地区：[1]西安科技大学材料科学与工程学院,陕西西安710054 [2]西安近代化学研究所、氟氮化工材料重点实验室,陕西西安710065

出　　处：《合成化学》2023年第4期283-289,共7页Chinese Journal of Synthetic Chemistry

基　　金：国家自然科学基金资助项目(21905225,51903206);陕西省自然科学科学基础研究计划(2019JQ-244);陕西省青年科学基金资助项目(2020JQ-985)。

摘　　要：以吡咯并吡咯二酮(DPP)为刚性单元,不同长度的烷基链作为柔性单元,设计合成了一系列刚性基元-柔性链段-刚性基元的双节棍型小分子化合物DPPN3、DPPN4、DPPN5和DPPN6。通过紫外-可见吸收光谱、电化学循环伏安法及密度泛函理论对其光物理和电化学性质进行了表征,并研究不同柔性链段长度对小分子光伏性能的影响。结果表明:柔性链段的长度对小分子的紫外吸收和能级结构影响均不明显,但能够影响化合物的自聚集行为,从而影响其光伏性能,其中基于DPPN3∶PC 71 BM的有机太阳能电池器件的能量转换效率可以达到0.26%。A series of double rod small molecular compounds DPPN3,DPPN4,DPPN5 and DPPN6 were designed and synthesized with pyrrolopyridone(DPP)as rigid unit and alkyl chains of different lengths as flexible unit.The photophysical and electrochemical properties were characterized by UV-Vis absorption spectroscopy,electrochemical cyclic voltammetry and density functional theory.The effects of different flexible segment lengths on the photovoltaic properties of small molecules were studied.The results show that the length of flexible chain segment has no obvious effect on the UV absorption and energy level structure of small molecules,but affect the self aggregation behavior of compounds and photovoltaic performance.The energy conversion efficiency of organic solar cell devices based on DPPN3∶PC 71 BM is 0.26%.

关 键 词：吡咯并吡咯二酮 双节棍 有机太阳能电池 柔性链 刚性基元 

分 类 号：TB322[一般工业技术—材料科学与工程]