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Low-Cost and High-Performance Polymer Solar Cells with Efficiency Insensitive to Active-Layer Thickness

CCS Chemistry 2023年第12期5卷 2945-2955页

作者： Xiaolei Kong Jinyuan Zhang Lei Meng Chenkai Sun Xin Jiang Jianqi Zhang Can Zhu Guangpei Sun Jing Li Xiaojun Li Zhixiang Wei Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190 School of Chemical Science University of Chinese Academy of SciencesBeijing 100049 College of Chemistry and Green Catalysis CenterZhengzhou UniversityZhengzhou 450001 CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190 Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190 Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and DevicesCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123

The power conversion efficiency(PCE)of polymer solar cells(PSCs)has recently increased quickly,propelling PSCs closer to large-scale ***,several critical issues,such as the cost of materials and the sensitivity of the PCE to active-layer thickness,must be addressed before industrial application can be realized on a large ***,we fabricated a high-performance ternary PSC based on a low-cost polymer donor PTQ10 and an A-da’d-A-type small molecule acceptor(SMA)2,2'-((2Z,2'Z)-((12,13-bis(2-butyloctyl)-3,9-bis(4-(2-ethylhexyl)thiophen-2-yl)-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2'',3'':4',5']thieno[2',3':4,5]pyrrolo[3,2-g]thieno[2',3':4,5]thieno[3,2-b]indole-2,10-diyl)bis(methaneylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile(m-TEH)with a newA-da’d-A-type SMA 2,2'-((2Z,2'Z)-((12,13-bis(2-butyloctyl)-3,9-bis(3-(2-ethylhexyl)phenyl)-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2'',3'':4',5']thieno[2',3':4,5]pyrrolo[3,2-g]thieno[2',3':4,5]thieno[3,2-b]indole-2,10-diyl)bis(methaneylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile(m-PEH)(with phenyl outer side chains)as the third *** from the good compatibility and the unique alignment of the energy levels between PTQ10 and the two SMAs,the ternary system showed favorable phase separation and dominant face-on orientation,exhibiting suitable film morphology and enhanced charge ***,the optimized ternary PSCs based on PTQ10∶m-TEH∶m-PEH(1.0∶0.9∶0.3,w/w/w)demonstrated an outstanding PCE of 19.34%,which is one of the highest PCEs reported for the single junction PSCs to *** importantly,the ternary PSCs demonstrated superior tolerance to the active-layer thickness and showed a high PCE of 18.02% with a high fill factor(FF)of 76.56% for the devices with the active-layer thickness even reaching 300 *** results indicate that the ternary devices based on PTQ10∶m-TEH∶m-PEH are highly

关键词： ternary polymer solar cells a-da’d-a-type small molecule acceptors side chain engineering insensitive to active-layer thickness commercial application

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