Over 18.1% Efficiency of Layer-by-Layer Polymer Solar Cells by Enhancing Exciton Utilization near the ITO Electrode

Xiaoling Ma; Wenjing Xu; Zhongyuan Liu; Sang Young Jeong; Chunyu Xu; Jian Zhang; Han Young Woo; Zhengji Zhou; Fujun Zhang

doi:10.1021/acsami.2c22461

Over 18.1% Efficiency of Layer-by-Layer Polymer Solar Cells by Enhancing Exciton Utilization near the ITO Electrode

Xiaoling Ma, Wenjing Xu, Zhongyuan Liu, Sang Young Jeong, Chunyu Xu, Jian Zhang, Han Young Woo, Zhengji Zhou, Fujun Zhang

Department of Chemistry

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

16 Citations (Scopus)

Abstract

In this work, layer-by-layer (LbL) polymer solar cells (PSCs) are constructed without/with the incorporation of a dissociation strengthening layer (DSL) on the basis of the wide-bandgap donor D18-Cl, as well as the narrow-bandgap nonfullerene acceptor Y6. The efficiency of LbL PSCs is enhanced from 17.62 to 18.15% through introducing a DSL, originating from the enhanced dissociation of D18-Cl excitons near the ITO electrode. Meanwhile, the interfacial energy between D18-Cl and Y6 layers is decreased by incorporating a DSL, which should facilitate molecular interdiffusion for more adequate exciton dissociation in LbL active layers. This work offers a simple and resultful way for realizing power conversion efficiency (PCE) improvement of LbL PSCs with maximized exciton utilization in LbL active layers. The universality of the DSL incorporation strategy on performance improvement can be further confirmed with a boosted PCE from 17.39 to 18.03% or from 17.13 to 17.61% for D18-Cl/L8-BO- or D18-Cl/N3-based LbL PSCs by incorporating a DSL.

Original language	English
Pages (from-to)	7247-7254
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	15
Issue number	5
DOIs	https://doi.org/10.1021/acsami.2c22461
Publication status	Published - 2023 Feb 8

Bibliographical note

Funding Information:
This work was supported by the Fundamental Research Funds for the Central Universities (2022JBMC046), NSFC (62105017, 61975006, and 62175011), and NSFC-STINT (62211530056).

Publisher Copyright:
© 2023 American Chemical Society.

Keywords

dissociation strengthening layer
exciton utilization
layer-by-layer method
molecular interdiffusion
polymer solar cells

ASJC Scopus subject areas

Materials Science(all)

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10.1021/acsami.2c22461

Cite this

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title = "Over 18.1% Efficiency of Layer-by-Layer Polymer Solar Cells by Enhancing Exciton Utilization near the ITO Electrode",

abstract = "In this work, layer-by-layer (LbL) polymer solar cells (PSCs) are constructed without/with the incorporation of a dissociation strengthening layer (DSL) on the basis of the wide-bandgap donor D18-Cl, as well as the narrow-bandgap nonfullerene acceptor Y6. The efficiency of LbL PSCs is enhanced from 17.62 to 18.15% through introducing a DSL, originating from the enhanced dissociation of D18-Cl excitons near the ITO electrode. Meanwhile, the interfacial energy between D18-Cl and Y6 layers is decreased by incorporating a DSL, which should facilitate molecular interdiffusion for more adequate exciton dissociation in LbL active layers. This work offers a simple and resultful way for realizing power conversion efficiency (PCE) improvement of LbL PSCs with maximized exciton utilization in LbL active layers. The universality of the DSL incorporation strategy on performance improvement can be further confirmed with a boosted PCE from 17.39 to 18.03% or from 17.13 to 17.61% for D18-Cl/L8-BO- or D18-Cl/N3-based LbL PSCs by incorporating a DSL.",

keywords = "dissociation strengthening layer, exciton utilization, layer-by-layer method, molecular interdiffusion, polymer solar cells",

author = "Xiaoling Ma and Wenjing Xu and Zhongyuan Liu and Jeong, {Sang Young} and Chunyu Xu and Jian Zhang and Woo, {Han Young} and Zhengji Zhou and Fujun Zhang",

note = "Funding Information: This work was supported by the Fundamental Research Funds for the Central Universities (2022JBMC046), NSFC (62105017, 61975006, and 62175011), and NSFC-STINT (62211530056). Publisher Copyright: {\textcopyright} 2023 American Chemical Society.",

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AU - Ma, Xiaoling

AU - Xu, Wenjing

AU - Liu, Zhongyuan

AU - Jeong, Sang Young

AU - Xu, Chunyu

AU - Zhang, Jian

AU - Woo, Han Young

AU - Zhou, Zhengji

AU - Zhang, Fujun

N1 - Funding Information: This work was supported by the Fundamental Research Funds for the Central Universities (2022JBMC046), NSFC (62105017, 61975006, and 62175011), and NSFC-STINT (62211530056). Publisher Copyright: © 2023 American Chemical Society.

PY - 2023/2/8

Y1 - 2023/2/8

N2 - In this work, layer-by-layer (LbL) polymer solar cells (PSCs) are constructed without/with the incorporation of a dissociation strengthening layer (DSL) on the basis of the wide-bandgap donor D18-Cl, as well as the narrow-bandgap nonfullerene acceptor Y6. The efficiency of LbL PSCs is enhanced from 17.62 to 18.15% through introducing a DSL, originating from the enhanced dissociation of D18-Cl excitons near the ITO electrode. Meanwhile, the interfacial energy between D18-Cl and Y6 layers is decreased by incorporating a DSL, which should facilitate molecular interdiffusion for more adequate exciton dissociation in LbL active layers. This work offers a simple and resultful way for realizing power conversion efficiency (PCE) improvement of LbL PSCs with maximized exciton utilization in LbL active layers. The universality of the DSL incorporation strategy on performance improvement can be further confirmed with a boosted PCE from 17.39 to 18.03% or from 17.13 to 17.61% for D18-Cl/L8-BO- or D18-Cl/N3-based LbL PSCs by incorporating a DSL.

AB - In this work, layer-by-layer (LbL) polymer solar cells (PSCs) are constructed without/with the incorporation of a dissociation strengthening layer (DSL) on the basis of the wide-bandgap donor D18-Cl, as well as the narrow-bandgap nonfullerene acceptor Y6. The efficiency of LbL PSCs is enhanced from 17.62 to 18.15% through introducing a DSL, originating from the enhanced dissociation of D18-Cl excitons near the ITO electrode. Meanwhile, the interfacial energy between D18-Cl and Y6 layers is decreased by incorporating a DSL, which should facilitate molecular interdiffusion for more adequate exciton dissociation in LbL active layers. This work offers a simple and resultful way for realizing power conversion efficiency (PCE) improvement of LbL PSCs with maximized exciton utilization in LbL active layers. The universality of the DSL incorporation strategy on performance improvement can be further confirmed with a boosted PCE from 17.39 to 18.03% or from 17.13 to 17.61% for D18-Cl/L8-BO- or D18-Cl/N3-based LbL PSCs by incorporating a DSL.

KW - dissociation strengthening layer

KW - exciton utilization

KW - layer-by-layer method

KW - molecular interdiffusion

KW - polymer solar cells

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SN - 1944-8244

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JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 5

ER -

Over 18.1% Efficiency of Layer-by-Layer Polymer Solar Cells by Enhancing Exciton Utilization near the ITO Electrode

Abstract

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Keywords

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