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Two star-shaped small molecule donors based on benzodithiophene unit for organic solar cells
文献摘要：
Star-shaped small molecules have attracted great attention for organic solar cells (OSCs) because they have three-dimensional charge-transport characteristics,strong light absorption capacities and easily tun-able energy levels.Herein,three-and four-armed star-shaped small molecule donors,namely BDT-3Th and BDT-4Th,respectively,have been successfully designed and synthesized,which used benzodithio-phene (BDT) as the central unit.The two star-shaped intermediates (2a and 2b) could be simultaneously obtained by one-step of Suzuki coupling,and 1,2-dimethoxyethane played a key role in the Suzuki cou-pling.Both of them have excellent thermal stability,good solubility and broad absorption.Four-armed BDT-4Th shows a slightly higher extinction coefficient,a deeper HOMO energy level and an obviously better phase separation morphology when blended with Y6 than three-armed BDT-3Th.As a result,in-creased power conversion efficiency (PCE) of 5.83％ is obtained in the BDT-4Th:Y6-based OSC devices,which is obviously higher than that of the BDT-3Th:Y6-based devices (PCE =3.78％).To the best of our knowledge,this is the highest PCE among the BDT-based star-shaped donors-based OSCs.This result pro-vides an effective strategy to obtain star-shaped small molecule donor materials for high efficient organic solar cells.
文献关键词：
中图分类号：
[1] 自动化技术、计算机技术（TP） / 计算技术、计算机技术（TP3） / 计算机的应用（TP39） / 信息处理(信息加工)（TP391）
[2] 医药、卫生（R） / 药学（R9） / 药理学（R96） / 实验药理学（R965）
[3] 医药、卫生（R） / 临床医学（R4） / 治疗学（R45） / 生物疗法（R456）
作者姓名：
Jun Xu;Jinsheng Zhang;Daobin Yang;Kuibao Yu;Dandan Li;Zihao Xia;Ziyi Ge
作者机构：
Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences,Ningbo 315201,China;Nano Science and Technology Institute,University of Science and Technology of China,Suzhou 215123,China;Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences,Beijing 100049,China
文献出处：
中国化学快报（英文版）
引用格式：
[1]Jun Xu;Jinsheng Zhang;Daobin Yang;Kuibao Yu;Dandan Li;Zihao Xia;Ziyi Ge-.Two star-shaped small molecule donors based on benzodithiophene unit for organic solar cells)[J].中国化学快报（英文版）,2022(01):247-251
A类：
3Th,4Th,benzodithio
B类：
Two,star,shaped,small,donors,benzodithiophene,unit,organic,solar,cells,Star,molecules,have,attracted,great,attention,OSCs,because,they,three,dimensional,charge,transport,characteristics,strong,absorption,capacities,easily,tun,able,energy,levels,Herein,four,armed,namely,BDT,respectively,been,successfully,designed,synthesized,which,used,central,two,intermediates,2a,2b,could,simultaneously,obtained,by,one,step,Suzuki,coupling,dimethoxyethane,played,key,role,Both,them,excellent,thermal,stability,good,solubility,broad,Four,shows,slightly,higher,extinction,coefficient,deeper,HOMO,obviously,better,phase,separation,morphology,when,blended,Y6,result,creased,power,conversion,efficiency,PCE,devices,that,To,best,knowledge,this,highest,among,This,pro,vides,effective,strategy,materials
AB值：
0.49168
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