基于双氰基茚满二酮吸电子单元的非对称小分子给体的合成及其光伏性能  

Preparation and photovoltaic performance of asymmetric small molecule donors with 2-(3-oxoindene)malononitrile as electron-accepting units

作　　者：王旭 陈斌文 李云飞 曹琨 邓林龙[1] 谢素原[2] 郑兰荪[2] WANG Xu;CHEN Binwen;LI Yunfei;CAO Kun;DENG Linlong;XIE Suyuan;ZHENG Lansun(Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen 361005,China;State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学萨本栋微米纳米科学技术研究院,福建厦门361005 [2]厦门大学化学化工学院,固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2023年第1期45-52,共8页Journal of Xiamen University：Natural Science

摘　　要：采用双氰基茚满二酮为吸电子单元,分别以苯并二噻吩并吡咯和4,4-二甲基三苯胺为给电子单元,设计合成了两种具有给电子-吸电子(D-A)型结构的非对称小分子给体材料D1和D2;通过紫外-可见吸收光谱和循环伏安法研究了这两个小分子给体的光学性能及电化学性质,并考察了由这两个小分子和C 70制备的全小分子有机太阳能电池的光伏性能.研究结果表明:含有稠环给电子单元的小分子给体D1比含有三苯胺给电子单元的D2具有更宽的光学吸收、更低的最高占据分子轨道能级和更好的光伏性能;以D1和D2为给体、C_(70)为受体的可真空蒸镀有机太阳能电池的最高光电转换效率分别为5.03%和3.78%.Two donor-acceptor(D-A)type asymmetric small molecule donors(D1 and D2)were designed and synthesized by using 2-(3-oxoindene)malononitrile as an electron-accepting unit,and benzodithienopyrrole and 4,4-dimethyltrianiline as electron-donating units,respectively.The optical and electrochemical properties of these two small molecule donors were investigated by UV-Vis absorption spectroscopy and cyclic voltammetry.At the same time,the photovoltaic performances of all-small-molecule organic solar cells based on these two small molecule donors and C 70 were evaluated.The results showed that small molecule donor D1 with fused ring electron-donating unit had wider optical absorption,lower the highest occupied molecular orbit energy level and better photovoltaic performance than D2 with triphenylamine electron-donating unit.The highest power conversion efficiencies of vacuum-deposited organic solar cells with D1 and D2 as donors and C_(70)as acceptor were 5.03%and 3.78%,respectively.

关 键 词：有机太阳能电池 小分子给体 双氰基茚满二酮 光伏性能 

分 类 号：O649.5[理学—物理化学]