New D‐A‐A’‐Configured Small Molecule Donors Employing Conjugation to Red‐shift the Absorption for Photovoltaics
作者:Chun‐Kai Wang、Xiaozhou Che、Yuan‐Chih Lo、Ya‐Ze Li、Yung‐Hao Wang、Stephen R. Forrest、Shun‐Wei Liu、Ken‐Tsung Wong
DOI:10.1002/asia.202000635
日期:2020.8.17
Four new donor‐acceptor‐acceptor’ (D‐A‐A’)‐configured donors, CPNT, DCPNT, CPNBT, and DCPNBT equipped with naphtho[1,2‐c:5,6‐c′]bis([1,2,5]‐thiadiazole) (NT) or naphtho[2,3‐c][1,2,5]thiadiazole (NBT) as the central acceptor (A) unit bridging triarylamine donor (D) and cyano or dicyanovinylene acceptor (A’), were synthesized and characterized. All molecules exhibit bathochromic absorption shifts as
四个新的供体-受体-受体'(d-A-A') -配置的供体,CPNT,DCPNT,CPNBT和DCPNBT配备萘并[1,2 -c:5,6 -c' ]双([1, 2,5]-噻二唑)(NT)或萘[2,3- c ] [1,2,5]噻二唑(NBT)作为中央受体(A)单元,桥接三芳基胺供体(D)和氰基或二氰基亚乙烯基受体(合成并表征。与基于苯并噻二唑(BT)的类似物相比,所有分子均表现出红移吸收位移,这是由于NT和NBT核的吸电子性和喹诺酮特性得到改善,从而导致更强的分子内电荷转移。能效等级与C 70保持一致与良好的热稳定性和反平行二聚体填料一起渲染CPNT和DCPNT用于真空处理的有机光伏器件(OPV),其适于供体S上。基于DCPNT的 OPV :C 70有源层的最佳功率转换效率(PCE)= 8.3%,开路电压为0.92 V,短路电流为14.5 mA cm -2,填充系数为62% 1个阳光强度,模拟AM1