Highly efficient and stable organic solar cells with SnO_(2)electron transport layer enabled by UV-curing acrylate oligomers  

作　　者：Mwende Mbilo Du Hyeon Ryu Seungjin Lee Muhammad Haris Julius Mwakondo Mwabora Robinson Juma Musembi Hang Ken Lee Sang Kyu Lee Chang Eun Song Won Suk Shin 

机构地区：[1]Department of Physics,Faculty of Science and Technology,University of Nairobi(UoN),P.O.Box 30197-00100,Nairobi,Kenya [2]Advanced Energy Materials Research Center,Korea Research Institute of Chemical Technology(KRICT),Daejeon 34114,Republic of Korea [3]Advanced Materials and Chemical Engineering,University of Science and Technology(UST),Daejeon 34113,Republic of Korea

出　　处：《Journal of Energy Chemistry》2024年第5期124-131,共8页能源化学（英文版）

基　　金：the Partnership for Skills in Applied Sciences,Engineering and Technology(PASET)-Regional Scholarship Innovation Fund(RSIF)(World Bank PASET No.IP22-15);supported by the National Research Foundation(NRF)(NRF-2021R1A2C2091787 and NRF-2022M3H4A1A03076280);the Korea Research Institute of Chemical Technology(KRICT)of the Republic of Korea(No.KS2422-10);the National Research Council of Science and Technology(Grant No.Global-23-007)of Republic of Korea。

摘　　要：The interfaces between the inorganic metal oxide and organic photoactive layer are of outmost importance for efficiency and stability in organic solar cells(OSCs).Tin oxide(SnO_(2))is one of the promising candidates for the electron transport layer(ETL)in high-performance inverted OSCs.When a solution-processed SnO_(2)ETL is employed,however,the presence of interfacial defects and suboptimal interfacial contact can lower the power conversion efficiency(PCE)and operational stability of OSCs.Herein,highly efficient and stable inverted OSCs by modification of the SnO_(2)surface with ultraviolet(UV)-curable acrylate oligomers(SAR and OCS)are demonstrated.The highest PCEs of 16.6%and 17.0%are achieved in PM6:Y6-BO OSCs with the SAR and OCS,respectively,outperforming a device with a bare SnO_(2)ETL(PCE 13.8%).The remarkable enhancement of PCEs is attributed to the optimized interfacial contact,leading to mitigated surface defects.More strikingly,improved light-soaking and thermal stability strongly correlated with the interfacial defects are demonstrated for OSCs based on SnO_(2)/UV cross-linked resins compared to OSCs utilizing bare SnO_(2).We believe that UV cross-linking oligomers will play a key role as interfacial modifiers in the future fabrication of large-area and flexible OSCs with high efficiency and stability.

关 键 词：Organic solar cells SnO_(2) Surface defects Ultraviolet resins Stability Cross-linking oligomers Non-halogenated solvent 

分 类 号：TQ317[化学工程—高聚物工业] TM914.4[电气工程—电力电子与电力传动]