H- and J-aggregation inspiring efficient solar conversion

Zhao, Qiaoqiao1,2,3; Lai, Hanjian1,2; Chen, Hui1,2; Li, Heng1,2; He, Feng1,2,4

2021-01-14

10.1039/d0ta11146e

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

Studies of morphology of organic solar cells (OSC) in bulk heterojunction (BHJ) structures are usually focussed on nanoscale morphology. However, morphology at molecular level, such as aggregation type, may also have a profound influence on the performance of OSCs. It is found that H- and J-aggregation coexist in BTIC-CF3-m and can be easily controlled by different additives. This provides a chance to study and gain a deeper insight into the role of the two aggregation types by directly comparing their effect on various photovoltaic performance parameters. Two common additives, 1-chloronaphthalene (CN) and 1,8-diiodooctane (DIO), support the formation of H- and J-aggregation, respectively and have different effects on the photovoltaic performance of OSCs. H-aggregation favors a higher open circuit voltage (V-oc), while J-aggregation favors a higher short circuit current (J(sc)). Both of these aggregation types can improve the fill factor (FF). On the whole, both the improvement of H- and J-aggregation can enhance the power conversion efficiency (PCE) and the H-aggregation of BTIC-CF3-m is more efficient in the system of PBDB-TF:BTIC-CF3-m. Then, H- and J-aggregation are further tuned by solvent vapor annealing (SVA), and consequently the PCE is enhanced to 16.36% from its pristine value of 13.37%. It demonstrates that the morphology optimization, especially precise control of the H- and J-aggregations, is the key factor to further improving premium organic solar conversion systems.

SCI ; EI

英语

第一 ; 通讯

China Postdoctoral Science Foundation[2019M651639] ; National Natural Science Foundation of China[21975115,51903116,21733005] ; Shenzhen Fundamental Research Program["JCYJ20190809163011543","JCYJ20170817111214740","KQJSCX20180319114442157"] ; Guangdong Provincial Key Laboratory of Catalysis[2020B121201002] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06G587] ; Shenzhen Sci-Tech Fund[KYTDPT20181011104007] ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences[DE-AC02-06CH11357]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000609149500034

ROYAL SOC CHEMISTRY

20210409817609

Additives ; Conversion efficiency ; Heterojunctions ; Morphology ; Open circuit voltage ; Photovoltaic effects

Energy Conversion Issues:525.5 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
3.Qilu Univ Technol, Shandong Acad Sci, State Key Lab Biobased Mat & Green Papermaking, Jinan 250353, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Catalysis, Shenzhen 518055, Peoples R China

Zhao, Qiaoqiao,Lai, Hanjian,Chen, Hui,et al. H- and J-aggregation inspiring efficient solar conversion[J]. Journal of Materials Chemistry A,2021,9(2):1119-1126.

Zhao, Qiaoqiao,Lai, Hanjian,Chen, Hui,Li, Heng,&He, Feng.(2021).H- and J-aggregation inspiring efficient solar conversion.Journal of Materials Chemistry A,9(2),1119-1126.

Zhao, Qiaoqiao,et al."H- and J-aggregation inspiring efficient solar conversion".Journal of Materials Chemistry A 9.2(2021):1119-1126.