Two dependent working mechanisms enables efficient ternary polymer solar cells with broad compositional tolerance

Zhang, Xingyu; Shen, Wenfei; Ma, Kaige; Huang, Linjun; Belfiore, Laurence A.

doi:10.1016/j.solener.2021.05.001

Cited by 3 publications

(1 citation statement)

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“…As summarized in Table , there is additional V OC loss in all kinds of ternary structure devices compared with binary devices. Therefore, studying about exciton separation dynamics and the methods to reduce the V OC loss is meaningful to further improve the photovoltaic performances of ternary PSCs. − Importantly, Kelvin probe force microscopy (KPFM) has recently been applied in PSCs to characterize the electronic properties of semiconductor nanostructures and surfaces. Sariciftci et al identified that there were obvious energy differences, based on the conjugated polymer/fullerene system, on the surface of the blend films cast in different solvents by KPFM.…”

Section: Introductionmentioning

confidence: 99%

Efficient D₁:D₂:A Ternary Polymer Solar Cells with Low Voltage Loss and Unblocked Hole Transport Channel Characterized by Kelvin Probe Force Microscopy

Wang

Zhang

et al. 2022

ACS Appl. Energy Mater.

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Voltage loss is an inescapable problem in ternary polymer solar cells (PSCs) because of utilizing photovoltaic materials with complementary absorption. In this work, two donor structure (D1:D2:A) ternary PSCs comprising a poly[(2,6-(4,8-bis(5-(2-hexyldecyl-3-fluoro)thiophen-2-yl)-benzo[1,2-b:4,5-b′]dithiophene))-alt-(5,5-(2,6-di-2-thienyl)-4,8-bis(5-(2-hexyldecyl)thiophen-2-yl)benzo[1,2-d:4,5-d′]bis(thiazole))] (PBB-F), poly[(2,6-(4,8-bis(5-(2-ethylhexyl-3-fleoro)thiophen-2-yl)-benzo[1,2-b:4,5-b′]dithiophene))-alt-(5,5-(1′,3′-di-2-thienyl-5′,7′-bis(2-ethylhexyl)benzo[1′,2′-c:4′,5′-c′]dithiophene-4,8-dione)] (PM6), and 3,9-bis(2-methylene-((3-(1,1-dicyanomethylene)-6,7-difluoro)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene) (IT-4F) system exhibit low voltage loss with no cascade energy level structure, whereas the corresponding devices acquire enhanced power conversion efficiency (PCE) of 15.08%. The increased PCEs are ascribed to the improved phase separation after incorporating PM6, and thus, the charge recombination loss can be suppressed and the charge transport and extraction can be enhanced. Importantly, Kelvin probe force microscopy (KPFM) of two donor material blend films on poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) or ZnO (under dark and 638 nm irradiation conditions) is performed to check the exciton separation dynamics of photovoltaic materials, and the results intuitively demonstrated that holes can efficiently transfer from the high highest occupied molecular orbital (HOMO) of donor PM6 to the low HOMO of donor PBB-F, which ensures unblocked hole transport channels and thus induces low voltage loss. Besides, the D1:D2:A PSCs showed broad component tolerance from 10 to 50% blend ratios for PM6, which is conducive to large-scale commercialization fabrication conditions.

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Section: Introductionmentioning

confidence: 99%

Efficient D₁:D₂:A Ternary Polymer Solar Cells with Low Voltage Loss and Unblocked Hole Transport Channel Characterized by Kelvin Probe Force Microscopy

Wang

Zhang

et al. 2022

ACS Appl. Energy Mater.

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Morphology manipulation of photoactive layer through block copolymer to improve the photovoltaic performances of polymer solar cells

Wang

Wang³

et al. 2023

Materials Science and Engineering: B

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Efficient D1:D2:A ternary all-polymer solar cell with optimized photoactive layer morphology realized by compatible two polymer donor

Ma,

Jin,

Shen

et al. 2024

Optical Materials

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Two dependent working mechanisms enables efficient ternary polymer solar cells with broad compositional tolerance

Cited by 3 publications

References 46 publications

Efficient D₁:D₂:A Ternary Polymer Solar Cells with Low Voltage Loss and Unblocked Hole Transport Channel Characterized by Kelvin Probe Force Microscopy

Efficient D₁:D₂:A Ternary Polymer Solar Cells with Low Voltage Loss and Unblocked Hole Transport Channel Characterized by Kelvin Probe Force Microscopy

Morphology manipulation of photoactive layer through block copolymer to improve the photovoltaic performances of polymer solar cells

Efficient D1:D2:A ternary all-polymer solar cell with optimized photoactive layer morphology realized by compatible two polymer donor

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Two dependent working mechanisms enables efficient ternary polymer solar cells with broad compositional tolerance

Cited by 3 publications

References 46 publications

Efficient D1:D2:A Ternary Polymer Solar Cells with Low Voltage Loss and Unblocked Hole Transport Channel Characterized by Kelvin Probe Force Microscopy

Efficient D1:D2:A Ternary Polymer Solar Cells with Low Voltage Loss and Unblocked Hole Transport Channel Characterized by Kelvin Probe Force Microscopy

Morphology manipulation of photoactive layer through block copolymer to improve the photovoltaic performances of polymer solar cells

Efficient D1:D2:A ternary all-polymer solar cell with optimized photoactive layer morphology realized by compatible two polymer donor

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Efficient D₁:D₂:A Ternary Polymer Solar Cells with Low Voltage Loss and Unblocked Hole Transport Channel Characterized by Kelvin Probe Force Microscopy

Efficient D₁:D₂:A Ternary Polymer Solar Cells with Low Voltage Loss and Unblocked Hole Transport Channel Characterized by Kelvin Probe Force Microscopy