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Efficient Ternary Blend Bulk Heterojunction Solar Cells with Tunable Open-Circuit Voltage.

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Title: Efficient Ternary Blend Bulk Heterojunction Solar Cells with Tunable Open-Circuit Voltage.
Authors: Khlyabich, Petr P.1, Burkhart, Beate1, Thompson, Barry C.1 barrycth@usc.edu
Source: Journal of the American Chemical Society. 9/21/2011, Vol. 133 Issue 37, p14534-14337. 4p.
Subjects: Solar cells, Heterojunctions, Photovoltaic power generation, Fullerene polymers, Photovoltaic cells
Abstract: To explore the potential of ternary blend bulk heterojunction (BHJ) photovoltaics as a general platform for increasing the attainable performance of organic solar cells, a model system based on poly(3-hexylthiophene) (P3HT) as the donor and two soluble fullerene acceptors, phenyl-C61-butyric acid methyl ester (PC61BM) and indene-C60 bisadduct (ICBA), was examined. In all of the solar cells, the overall ratio of polymer to fullerene was maintained at 1:1, while the composition of the fullerene component (PC61BM:ICBA ratio) was varied. Photovoltaic devices showed high short-circuit current densities (Jsc) and fill factors (FF) (>0.57) at all fullerene ratios, while the open-circuit voltage (Voc) was found to vary from 0.61 to 0.84 V as the fraction of ICBA was increased. These results indicate that the Voc in ternary blend BHJ solar cells is not limited to the smallest Voc of the corresponding binary blend solar cells but can be varied between the extreme Voc values without significant effect on the Jsc or FF. By extension, this result suggests that ternary blends provide a potentially effective route toward maximizing the attainable JscVoc product (which is directly proportional to the solar cell efficiency) in BHJ solar cells and that with judicious selection of donor and acceptor components, solar cells with efficiencies exceeding the theoretical limits for binary blend solar cells could be possible without sacrificing the simplicity of a single active-layer processing step. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the American Chemical Society is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Efficient Ternary Blend Bulk Heterojunction Solar Cells with Tunable Open-Circuit Voltage.
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  Data: <searchLink fieldCode="AR" term="%22Khlyabich%2C+Petr+P%2E%22">Khlyabich, Petr P.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Burkhart%2C+Beate%22">Burkhart, Beate</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Thompson%2C+Barry+C%2E%22">Thompson, Barry C.</searchLink><relatesTo>1</relatesTo><i> barrycth@usc.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+American+Chemical+Society%22">Journal of the American Chemical Society</searchLink>. 9/21/2011, Vol. 133 Issue 37, p14534-14337. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Solar+cells%22">Solar cells</searchLink><br /><searchLink fieldCode="DE" term="%22Heterojunctions%22">Heterojunctions</searchLink><br /><searchLink fieldCode="DE" term="%22Photovoltaic+power+generation%22">Photovoltaic power generation</searchLink><br /><searchLink fieldCode="DE" term="%22Fullerene+polymers%22">Fullerene polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Photovoltaic+cells%22">Photovoltaic cells</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To explore the potential of ternary blend bulk heterojunction (BHJ) photovoltaics as a general platform for increasing the attainable performance of organic solar cells, a model system based on poly(3-hexylthiophene) (P3HT) as the donor and two soluble fullerene acceptors, phenyl-C61-butyric acid methyl ester (PC61BM) and indene-C60 bisadduct (ICBA), was examined. In all of the solar cells, the overall ratio of polymer to fullerene was maintained at 1:1, while the composition of the fullerene component (PC61BM:ICBA ratio) was varied. Photovoltaic devices showed high short-circuit current densities (Jsc) and fill factors (FF) (>0.57) at all fullerene ratios, while the open-circuit voltage (Voc) was found to vary from 0.61 to 0.84 V as the fraction of ICBA was increased. These results indicate that the Voc in ternary blend BHJ solar cells is not limited to the smallest Voc of the corresponding binary blend solar cells but can be varied between the extreme Voc values without significant effect on the Jsc or FF. By extension, this result suggests that ternary blends provide a potentially effective route toward maximizing the attainable JscVoc product (which is directly proportional to the solar cell efficiency) in BHJ solar cells and that with judicious selection of donor and acceptor components, solar cells with efficiencies exceeding the theoretical limits for binary blend solar cells could be possible without sacrificing the simplicity of a single active-layer processing step. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Journal of the American Chemical Society is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1021/ja205977z
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        Text: English
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        Type: general
      – SubjectFull: Heterojunctions
        Type: general
      – SubjectFull: Photovoltaic power generation
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      – SubjectFull: Fullerene polymers
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      – TitleFull: Efficient Ternary Blend Bulk Heterojunction Solar Cells with Tunable Open-Circuit Voltage.
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              Text: 9/21/2011
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