Enhancement in Open-Circuit Voltage in Organic Solar Cells by Using Ladder-Type Nonfullerene Acceptors

Zhengxu Cai; Donglin Zhao; Valerii Sharapov; Mohammad A. Awais; Na Zhang; Wei Chen; Luping Yu

doi:10.1021/acsami.8b01308

Enhancement in Open-Circuit Voltage in Organic Solar Cells by Using Ladder-Type Nonfullerene Acceptors

Zhengxu Cai, Donglin Zhao, Valerii Sharapov, Mohammad A. Awais, Na Zhang, Wei Chen, Luping Yu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

The open-circuit voltage (V_oc) loss has always been a major factor in lowering power conversion efficiencies (PCEs) in bulk heterojunction organic photovoltaic cells (OPVs). A method to improve the V_oc is indispensable to achieve high PCEs. In this paper, we investigated a series of perylene diimide-based ladder-type molecules as electron acceptors in nonfullerene OPVs. The D-A ladder-type structures described here lock our π-systems into a planar structure and eliminate bond twisting associated with linear conjugated systems. This enlarges the interface energy gap (ΔE_DA), extends electronic delocalization, and hence improves the V_oc. More importantly, these devices showed an increase in V_oc without compromising either the J_sc or the FF. C5r exhibited a strong intermolecular interaction and a PCE value of 6.1%. Moreover, grazing-incident wide-angle X-ray scattering analysis and atomic force microscopy images suggested that our fused-ring acceptors showed a suitable domain size and uniform blend films, which were not affected by their rigid molecular structures.

Original language	English
Pages (from-to)	13528-13533
Number of pages	6
Journal	ACS applied materials & interfaces
Volume	10
Issue number	16
DOIs	https://doi.org/10.1021/acsami.8b01308
Publication status	Published - 25 Apr 2018
Externally published	Yes

Keywords

ladder-type molecules
nonfullerene acceptor
open-circuit voltage improvement
organic solar cells
ring-fusing effect

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acsami.8b01308

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@article{d1f7f7e22b50401f9d549cc549b9b43a,

title = "Enhancement in Open-Circuit Voltage in Organic Solar Cells by Using Ladder-Type Nonfullerene Acceptors",

abstract = "The open-circuit voltage (Voc) loss has always been a major factor in lowering power conversion efficiencies (PCEs) in bulk heterojunction organic photovoltaic cells (OPVs). A method to improve the Voc is indispensable to achieve high PCEs. In this paper, we investigated a series of perylene diimide-based ladder-type molecules as electron acceptors in nonfullerene OPVs. The D-A ladder-type structures described here lock our π-systems into a planar structure and eliminate bond twisting associated with linear conjugated systems. This enlarges the interface energy gap (ΔEDA), extends electronic delocalization, and hence improves the Voc. More importantly, these devices showed an increase in Voc without compromising either the Jsc or the FF. C5r exhibited a strong intermolecular interaction and a PCE value of 6.1%. Moreover, grazing-incident wide-angle X-ray scattering analysis and atomic force microscopy images suggested that our fused-ring acceptors showed a suitable domain size and uniform blend films, which were not affected by their rigid molecular structures.",

keywords = "ladder-type molecules, nonfullerene acceptor, open-circuit voltage improvement, organic solar cells, ring-fusing effect",

author = "Zhengxu Cai and Donglin Zhao and Valerii Sharapov and Awais, {Mohammad A.} and Na Zhang and Wei Chen and Luping Yu",

note = "Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

year = "2018",

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doi = "10.1021/acsami.8b01308",

language = "English",

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T1 - Enhancement in Open-Circuit Voltage in Organic Solar Cells by Using Ladder-Type Nonfullerene Acceptors

AU - Cai, Zhengxu

AU - Zhao, Donglin

AU - Sharapov, Valerii

AU - Awais, Mohammad A.

AU - Zhang, Na

AU - Chen, Wei

AU - Yu, Luping

PY - 2018/4/25

Y1 - 2018/4/25

N2 - The open-circuit voltage (Voc) loss has always been a major factor in lowering power conversion efficiencies (PCEs) in bulk heterojunction organic photovoltaic cells (OPVs). A method to improve the Voc is indispensable to achieve high PCEs. In this paper, we investigated a series of perylene diimide-based ladder-type molecules as electron acceptors in nonfullerene OPVs. The D-A ladder-type structures described here lock our π-systems into a planar structure and eliminate bond twisting associated with linear conjugated systems. This enlarges the interface energy gap (ΔEDA), extends electronic delocalization, and hence improves the Voc. More importantly, these devices showed an increase in Voc without compromising either the Jsc or the FF. C5r exhibited a strong intermolecular interaction and a PCE value of 6.1%. Moreover, grazing-incident wide-angle X-ray scattering analysis and atomic force microscopy images suggested that our fused-ring acceptors showed a suitable domain size and uniform blend films, which were not affected by their rigid molecular structures.

AB - The open-circuit voltage (Voc) loss has always been a major factor in lowering power conversion efficiencies (PCEs) in bulk heterojunction organic photovoltaic cells (OPVs). A method to improve the Voc is indispensable to achieve high PCEs. In this paper, we investigated a series of perylene diimide-based ladder-type molecules as electron acceptors in nonfullerene OPVs. The D-A ladder-type structures described here lock our π-systems into a planar structure and eliminate bond twisting associated with linear conjugated systems. This enlarges the interface energy gap (ΔEDA), extends electronic delocalization, and hence improves the Voc. More importantly, these devices showed an increase in Voc without compromising either the Jsc or the FF. C5r exhibited a strong intermolecular interaction and a PCE value of 6.1%. Moreover, grazing-incident wide-angle X-ray scattering analysis and atomic force microscopy images suggested that our fused-ring acceptors showed a suitable domain size and uniform blend films, which were not affected by their rigid molecular structures.

KW - ladder-type molecules

KW - nonfullerene acceptor

KW - open-circuit voltage improvement

KW - organic solar cells

KW - ring-fusing effect

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IS - 16

ER -

Enhancement in Open-Circuit Voltage in Organic Solar Cells by Using Ladder-Type Nonfullerene Acceptors

Abstract

Keywords

UN SDGs

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