A non-fullerene acceptor with all "a" units realizing high open-circuit voltage solution-processed organic photovoltaics

Lingcheng Chen, Linquan Huang, Dong Yang, Shuying Ma, Xin Zhou, Jian Zhang, Guoli Tu, Can Li

Materials Science and Engineering

Research output: Contribution to journal › Article

Abstract

A novel non-fullerene small molecule electron acceptor TTzBT-DCAO, which contains all electron-withdrawing units of 2,1,3-benzothiadiazole, oligothiazole and alkyl cyanoacetate, has been synthesized and characterized. Its photophysical, electrochemical, and photovoltaic properties have been investigated. The material has favorable HOMO and LUMO levels of -5.88 and -3.60 eV, and shows strong absorption in the visible spectrum up to 650 nm. The small molecule:non-fullerene bulk-heterojunction organic photovoltaics (OPVs) were constructed based on two small molecules SF8TBT and TTzBT-DCAO. The influence of the donor:acceptor composition on device performance was investigated. The open-circuit voltages of the devices are over 1.20 V, which is among the highest values reported for single-junction OPVs. The results indicate that small molecules with all electron-withdrawing units could provide a novel route to efficient solution-processed OPVs with high open-circuit voltages.

Original language	English (US)
Pages (from-to)	2657-2662
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	2
Issue number	8
DOIs	https://doi.org/10.1039/c3ta14396a
Publication status	Published - Feb 28 2014

All Science Journal Classification (ASJC) codes

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

Cite this

Chen, Lingcheng ; Huang, Linquan ; Yang, Dong ; Ma, Shuying ; Zhou, Xin ; Zhang, Jian ; Tu, Guoli ; Li, Can. / A non-fullerene acceptor with all "a" units realizing high open-circuit voltage solution-processed organic photovoltaics. In: Journal of Materials Chemistry A. 2014 ; Vol. 2, No. 8. pp. 2657-2662.

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abstract = "A novel non-fullerene small molecule electron acceptor TTzBT-DCAO, which contains all electron-withdrawing units of 2,1,3-benzothiadiazole, oligothiazole and alkyl cyanoacetate, has been synthesized and characterized. Its photophysical, electrochemical, and photovoltaic properties have been investigated. The material has favorable HOMO and LUMO levels of -5.88 and -3.60 eV, and shows strong absorption in the visible spectrum up to 650 nm. The small molecule:non-fullerene bulk-heterojunction organic photovoltaics (OPVs) were constructed based on two small molecules SF8TBT and TTzBT-DCAO. The influence of the donor:acceptor composition on device performance was investigated. The open-circuit voltages of the devices are over 1.20 V, which is among the highest values reported for single-junction OPVs. The results indicate that small molecules with all electron-withdrawing units could provide a novel route to efficient solution-processed OPVs with high open-circuit voltages.",

author = "Lingcheng Chen and Linquan Huang and Dong Yang and Shuying Ma and Xin Zhou and Jian Zhang and Guoli Tu and Can Li",

year = "2014",

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doi = "10.1039/c3ta14396a",

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AU - Chen, Lingcheng

AU - Huang, Linquan

AU - Yang, Dong

AU - Ma, Shuying

AU - Zhou, Xin

AU - Zhang, Jian

AU - Tu, Guoli

AU - Li, Can

PY - 2014/2/28

Y1 - 2014/2/28

N2 - A novel non-fullerene small molecule electron acceptor TTzBT-DCAO, which contains all electron-withdrawing units of 2,1,3-benzothiadiazole, oligothiazole and alkyl cyanoacetate, has been synthesized and characterized. Its photophysical, electrochemical, and photovoltaic properties have been investigated. The material has favorable HOMO and LUMO levels of -5.88 and -3.60 eV, and shows strong absorption in the visible spectrum up to 650 nm. The small molecule:non-fullerene bulk-heterojunction organic photovoltaics (OPVs) were constructed based on two small molecules SF8TBT and TTzBT-DCAO. The influence of the donor:acceptor composition on device performance was investigated. The open-circuit voltages of the devices are over 1.20 V, which is among the highest values reported for single-junction OPVs. The results indicate that small molecules with all electron-withdrawing units could provide a novel route to efficient solution-processed OPVs with high open-circuit voltages.

AB - A novel non-fullerene small molecule electron acceptor TTzBT-DCAO, which contains all electron-withdrawing units of 2,1,3-benzothiadiazole, oligothiazole and alkyl cyanoacetate, has been synthesized and characterized. Its photophysical, electrochemical, and photovoltaic properties have been investigated. The material has favorable HOMO and LUMO levels of -5.88 and -3.60 eV, and shows strong absorption in the visible spectrum up to 650 nm. The small molecule:non-fullerene bulk-heterojunction organic photovoltaics (OPVs) were constructed based on two small molecules SF8TBT and TTzBT-DCAO. The influence of the donor:acceptor composition on device performance was investigated. The open-circuit voltages of the devices are over 1.20 V, which is among the highest values reported for single-junction OPVs. The results indicate that small molecules with all electron-withdrawing units could provide a novel route to efficient solution-processed OPVs with high open-circuit voltages.

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