Effect of core on photovoltaic performance of naphthalimide interlayer materialsOA
In this study,we designed and synthesized three naphthalimide(NI)-based organic cathode interlayer materials(CIMs)with different electron-donating cores-N2FN,NEDOT,and NDTP.As the size and electron-donating ability of the cores increased,the CIMs exhibited enhanced thermal stabilities with increased decomposition temperatures,red-shifted and enlarged absorption spectra,and elevated molecular orbital energy levels.The N2FN with a fluorinated thiophene core exhibited the strongest self-doping effect and intermolecular π stacking,leading to the highest electron mobility and the poorest surface contact.By contrast,the NEDOT and NDTP with steric cores exhibited relatively low self-doping intensity and large d-spacing of π-π stacking but demonstrated smooth surface morphologies and good electric contact with low series resistance.Finally,binary organic solar cells(OSCs)based on the NDTP interlayer exhibited a power conversion efficiency of up to 18.5%,which was higher than those of N2FN(15.3%)and NEDOT(17.8%)cores.This study reveals that the core method is an effective way to design efficient NI-based CIMs for high-efficiency non-fullerene OSCs.
Jilei Jiang;Lijun Gao;Jinqi Hu;Lunxiu Cui;Hao Liu;Xu Zhang;Shucong Zhang;Ke Gao;Heqing Jiang;Minghua Huang;Shuixing Dai
School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,ChinaSchool of Materials Science and Engineering,Ocean University of China,Qingdao 266100,ChinaSchool of Materials Science and Engineering,Ocean University of China,Qingdao 266100,ChinaSchool of Materials Science and Engineering,Ocean University of China,Qingdao 266100,ChinaSchool of Materials Science and Engineering,Ocean University of China,Qingdao 266100,ChinaSchool of Chemistry and Chemical Engineering,Shandong University,Qingdao 266237,ChinaSchool of Materials Science and Engineering,Ocean University of China,Qingdao 266100,ChinaSchool of Chemistry and Chemical Engineering,Shandong University,Qingdao 266237,ChinaState Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,ChinaSchool of Materials Science and Engineering,Ocean University of China,Qingdao 266100,ChinaSchool of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China
信息技术与安全科学
Cathode interlayer materialsCore effectNaphthalimideOrganic solar cells
《Green Carbon》 2026 (1)
P.34-40,7
supported by the Shandong Provincial Natural Science Foundation of China(Grant No.ZR2024QB022)the State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy(Innovation Fund Project SKLPCU24OP010)the National Natural Science Foundation of China(Grant No.22105189).
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