Enhanced Open-Circuit Voltage by Using 2,7-Pyrene as a Central Donor Unit in A-π-D-π-A-Type Small-Molecule-Based Organic Solar Cells

Heng Chen; Qiang Tao; Jiyong Deng; Wenhong Peng; Weiguo Zhu; Donghong Yu

doi:10.1002/slct.202204878

Enhanced Open-Circuit Voltage by Using 2,7-Pyrene as a Central Donor Unit in A-π-D-π-A-Type Small-Molecule-Based Organic Solar Cells

Heng Chen, Qiang Tao^*, Jiyong Deng^*, Wenhong Peng, Weiguo Zhu^*, Donghong Yu

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

3 Citations (Scopus)

Abstract

To get insights into the relationship between molecular structure and performance in photovoltaic cells, two small molecules of T(3TDRCN)₂ and Pr(3TDRCN)₂ were synthesized with an A-π-D-π-A type backbone structure. The T(3TDRCN)₂ and Pr(3TDRCN)₂ were using n-octyl side chains substituted trithiophene (3T) as the π-linker and 2-(1,1-dicyanomethylene)-rhodanine (DRCN) as terminal acceptor (A) group, while varied the central donor (D) unit from thiophene (T) to 2,7-pyrene (Pr). Both SMs were applied as donor materials along with fullerene acceptor (PC₇₁BM) for solution-processed bulk-heterojunction solar cells. The impacts of central donor units on their optical absorption, electrochemical property, hole mobility, and solar cell performance were primarily studied. The T(3TDRCN)₂:PC₇₁BM based devices yielded a power conversion efficiency (PCE) of 2.60 % with an open circuit voltage (V_oc) of 0.89 V. Interestingly, the Pr(3TDRCN)₂ based solar cell exhibited an higher PCE of 4.47 % with an improved V_oc of 0.95 V. Our work indicates that using large π-conjugated aromatic donor with weak-electron donating property as central unit can improve V_oc, as well as high photovoltaic efficiency of the A-π-D-π-A type SMs in organic solar cells.

Original language	English
Article number	e202204878
Journal	ChemistrySelect
Volume	8
Issue number	13
ISSN	2365-6549
DOIs	https://doi.org/10.1002/slct.202204878
Publication status	Published - 5 Apr 2023

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

2,7-pyrene
A-π-D-π-A framework
Organic solar cells
Photovoltaic performance
Small molecules

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@article{0a85e461f5cb401c8daa328976f4c216,

title = "Enhanced Open-Circuit Voltage by Using 2,7-Pyrene as a Central Donor Unit in A-π-D-π-A-Type Small-Molecule-Based Organic Solar Cells",

abstract = "To get insights into the relationship between molecular structure and performance in photovoltaic cells, two small molecules of T(3TDRCN)2 and Pr(3TDRCN)2 were synthesized with an A-π-D-π-A type backbone structure. The T(3TDRCN)2 and Pr(3TDRCN)2 were using n-octyl side chains substituted trithiophene (3T) as the π-linker and 2-(1,1-dicyanomethylene)-rhodanine (DRCN) as terminal acceptor (A) group, while varied the central donor (D) unit from thiophene (T) to 2,7-pyrene (Pr). Both SMs were applied as donor materials along with fullerene acceptor (PC71BM) for solution-processed bulk-heterojunction solar cells. The impacts of central donor units on their optical absorption, electrochemical property, hole mobility, and solar cell performance were primarily studied. The T(3TDRCN)2:PC71BM based devices yielded a power conversion efficiency (PCE) of 2.60 % with an open circuit voltage (Voc) of 0.89 V. Interestingly, the Pr(3TDRCN)2 based solar cell exhibited an higher PCE of 4.47 % with an improved Voc of 0.95 V. Our work indicates that using large π-conjugated aromatic donor with weak-electron donating property as central unit can improve Voc, as well as high photovoltaic efficiency of the A-π-D-π-A type SMs in organic solar cells.",

keywords = "2,7-pyrene, A-π-D-π-A framework, Organic solar cells, Photovoltaic performance, Small molecules",

author = "Heng Chen and Qiang Tao and Jiyong Deng and Wenhong Peng and Weiguo Zhu and Donghong Yu",

note = "Publisher Copyright: {\textcopyright} 2023 Wiley-VCH GmbH.",

year = "2023",

month = apr,

day = "5",

doi = "10.1002/slct.202204878",

language = "English",

volume = "8",

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T1 - Enhanced Open-Circuit Voltage by Using 2,7-Pyrene as a Central Donor Unit in A-π-D-π-A-Type Small-Molecule-Based Organic Solar Cells

AU - Chen, Heng

AU - Tao, Qiang

AU - Deng, Jiyong

AU - Peng, Wenhong

AU - Zhu, Weiguo

AU - Yu, Donghong

PY - 2023/4/5

Y1 - 2023/4/5

N2 - To get insights into the relationship between molecular structure and performance in photovoltaic cells, two small molecules of T(3TDRCN)2 and Pr(3TDRCN)2 were synthesized with an A-π-D-π-A type backbone structure. The T(3TDRCN)2 and Pr(3TDRCN)2 were using n-octyl side chains substituted trithiophene (3T) as the π-linker and 2-(1,1-dicyanomethylene)-rhodanine (DRCN) as terminal acceptor (A) group, while varied the central donor (D) unit from thiophene (T) to 2,7-pyrene (Pr). Both SMs were applied as donor materials along with fullerene acceptor (PC71BM) for solution-processed bulk-heterojunction solar cells. The impacts of central donor units on their optical absorption, electrochemical property, hole mobility, and solar cell performance were primarily studied. The T(3TDRCN)2:PC71BM based devices yielded a power conversion efficiency (PCE) of 2.60 % with an open circuit voltage (Voc) of 0.89 V. Interestingly, the Pr(3TDRCN)2 based solar cell exhibited an higher PCE of 4.47 % with an improved Voc of 0.95 V. Our work indicates that using large π-conjugated aromatic donor with weak-electron donating property as central unit can improve Voc, as well as high photovoltaic efficiency of the A-π-D-π-A type SMs in organic solar cells.

AB - To get insights into the relationship between molecular structure and performance in photovoltaic cells, two small molecules of T(3TDRCN)2 and Pr(3TDRCN)2 were synthesized with an A-π-D-π-A type backbone structure. The T(3TDRCN)2 and Pr(3TDRCN)2 were using n-octyl side chains substituted trithiophene (3T) as the π-linker and 2-(1,1-dicyanomethylene)-rhodanine (DRCN) as terminal acceptor (A) group, while varied the central donor (D) unit from thiophene (T) to 2,7-pyrene (Pr). Both SMs were applied as donor materials along with fullerene acceptor (PC71BM) for solution-processed bulk-heterojunction solar cells. The impacts of central donor units on their optical absorption, electrochemical property, hole mobility, and solar cell performance were primarily studied. The T(3TDRCN)2:PC71BM based devices yielded a power conversion efficiency (PCE) of 2.60 % with an open circuit voltage (Voc) of 0.89 V. Interestingly, the Pr(3TDRCN)2 based solar cell exhibited an higher PCE of 4.47 % with an improved Voc of 0.95 V. Our work indicates that using large π-conjugated aromatic donor with weak-electron donating property as central unit can improve Voc, as well as high photovoltaic efficiency of the A-π-D-π-A type SMs in organic solar cells.

KW - 2,7-pyrene

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JO - ChemistrySelect

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M1 - e202204878

ER -

Enhanced Open-Circuit Voltage by Using 2,7-Pyrene as a Central Donor Unit in A-π-D-π-A-Type Small-Molecule-Based Organic Solar Cells

Abstract

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