Optimizing of Cathode Interface Layers in Organic Solar Cells Using Polyphenols: An Effective Approach

Xiaoman Ding; Jie Lv; Zezhou Liang; Xiaokang Sun; Jingjing Zhao; Manjia Lu; Fei Wang; Chenyang Zhang; Guangye Zhang; Tongle Xu; Dingqin Hu; zhipeng kan; Changshun Ruan; Yumeng Shi; Haoran Lin; Wanqing Zhang; Gang Li; Hanlin Hu

doi:10.1002/aenm.202401741

Optimizing of Cathode Interface Layers in Organic Solar Cells Using Polyphenols: An Effective Approach

Xiaoman Ding, Jie Lv^*, Zezhou Liang, Xiaokang Sun, Jingjing Zhao, Manjia Lu, Fei Wang, Chenyang Zhang, Guangye Zhang, Tongle Xu, Dingqin Hu, zhipeng kan, Changshun Ruan, Yumeng Shi, Haoran Lin, Wanqing Zhang^*, Gang Li^*, Hanlin Hu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

13 Citations (Scopus)

Abstract

The cathode interface layers (CILs) play a crucial role in enhancing the performance of organic solar cells (OSCs). However, challenges arise due to the high work function of CIL and inadequate contact with the active layer, leading to high interface trap recombination and poor charge extraction. In this study, a novel approach is proposed to improve charge injection and extraction in CILs by incorporating polyphenols, trihydroxybenzoic acid (TBA). Focusing on the CIL PDINN, its work function is successfully reduced from 4.14 eV to 3.80 eV and obtained charge collection efficiency of 91.23% through TBA regulation. These enhancements can be ascribed to improved contact between the active layer and the CILs, and enhanced the formation of a fine fiber phase width and inhibited interface recombination. As a result, the power conversion efficiency (PCE) of the binary OSCs comprising PM6: BTP-ec9 exhibits an increase from 18.2% to 19.3%, placing it among the one of the highest PCE values. Moreover, this approach demonstrated notable applicability for another CILs, as well as various OSCs systems. Overall, this research underscores the importance of regulating and modifying CILs to fully exploit their potential in OSCs devices, while laying the groundwork for optimizing their efficiency and stability. © 2024 Wiley-VCH GmbH.

Original language	English
Article number	2401741
Journal	Advanced Energy Materials
Volume	14
Issue number	36
Online published	22 Jun 2024
DOIs	https://doi.org/10.1002/aenm.202401741
Publication status	Published - 26 Sept 2024

Funding

H.H. thanks the support from Scientific Research Startup Fund for Spray-on Perovskite Photovoltaics R&D Center (No. 602331011PQ), Shenzhen Science and Technology Innovation Commission (Project No. 20220811205532001), Guangdong Basic and Applied Basic Research Foundation (No. 2023A1515011677) and Innovation Team Project of Guangdong (2022KCXTD055), Research Projects of Department of Education of Guangdong Province −2023GCZX015. J.L. thanks the support from China Postdoctoral Science Foundation (2022M720156), and the Post-Doctoral Foundation Project of Shenzhen Polytechnic University 6022331001K. W.Z. thanks the support from the Key Scientific and Technological Project of Henan Province (232102230028), and the Key Project of Science and Technology Program of Xinxiang City (No. GG2021005). G.L. thanks the support from Shenzhen Science and Technology Innovation Commission (Project No. JCYJ20200109105003940); Research Grants Council of Hong Kong (GRF grant 15221320, CRF C5037-18G, C7018-20G); the Hong Kong Polytechnic University funds (Sir Sze-yuen Chung Endowed Professorship Fund (8-8480), and RISE (Q-CDA5).

Research Keywords

inhibited interface recombination
organic solar cells
regulation CIL
stability
TBA

UN SDGs

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

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Ding, X., Lv, J., Liang, Z., Sun, X., Zhao, J., Lu, M., Wang, F., Zhang, C., Zhang, G., Xu, T., Hu, D., kan, Z., Ruan, C., Shi, Y., Lin, H., Zhang, W., Li, G., & Hu, H. (2024). Optimizing of Cathode Interface Layers in Organic Solar Cells Using Polyphenols: An Effective Approach. Advanced Energy Materials, 14(36), Article 2401741. https://doi.org/10.1002/aenm.202401741

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title = "Optimizing of Cathode Interface Layers in Organic Solar Cells Using Polyphenols: An Effective Approach",

abstract = "The cathode interface layers (CILs) play a crucial role in enhancing the performance of organic solar cells (OSCs). However, challenges arise due to the high work function of CIL and inadequate contact with the active layer, leading to high interface trap recombination and poor charge extraction. In this study, a novel approach is proposed to improve charge injection and extraction in CILs by incorporating polyphenols, trihydroxybenzoic acid (TBA). Focusing on the CIL PDINN, its work function is successfully reduced from 4.14 eV to 3.80 eV and obtained charge collection efficiency of 91.23% through TBA regulation. These enhancements can be ascribed to improved contact between the active layer and the CILs, and enhanced the formation of a fine fiber phase width and inhibited interface recombination. As a result, the power conversion efficiency (PCE) of the binary OSCs comprising PM6: BTP-ec9 exhibits an increase from 18.2% to 19.3%, placing it among the one of the highest PCE values. Moreover, this approach demonstrated notable applicability for another CILs, as well as various OSCs systems. Overall, this research underscores the importance of regulating and modifying CILs to fully exploit their potential in OSCs devices, while laying the groundwork for optimizing their efficiency and stability. {\textcopyright} 2024 Wiley-VCH GmbH.",

keywords = "inhibited interface recombination, organic solar cells, regulation CIL, stability, TBA",

author = "Xiaoman Ding and Jie Lv and Zezhou Liang and Xiaokang Sun and Jingjing Zhao and Manjia Lu and Fei Wang and Chenyang Zhang and Guangye Zhang and Tongle Xu and Dingqin Hu and zhipeng kan and Changshun Ruan and Yumeng Shi and Haoran Lin and Wanqing Zhang and Gang Li and Hanlin Hu",

year = "2024",

month = sep,

day = "26",

doi = "10.1002/aenm.202401741",

language = "English",

volume = "14",

journal = "Advanced Energy Materials",

issn = "1614-6832",

publisher = "John Wiley & Sons",

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TY - JOUR

T1 - Optimizing of Cathode Interface Layers in Organic Solar Cells Using Polyphenols

T2 - An Effective Approach

AU - Ding, Xiaoman

AU - Lv, Jie

AU - Liang, Zezhou

AU - Sun, Xiaokang

AU - Zhao, Jingjing

AU - Lu, Manjia

AU - Wang, Fei

AU - Zhang, Chenyang

AU - Zhang, Guangye

AU - Xu, Tongle

AU - Hu, Dingqin

AU - kan, zhipeng

AU - Ruan, Changshun

AU - Shi, Yumeng

AU - Lin, Haoran

AU - Zhang, Wanqing

AU - Li, Gang

AU - Hu, Hanlin

PY - 2024/9/26

Y1 - 2024/9/26

N2 - The cathode interface layers (CILs) play a crucial role in enhancing the performance of organic solar cells (OSCs). However, challenges arise due to the high work function of CIL and inadequate contact with the active layer, leading to high interface trap recombination and poor charge extraction. In this study, a novel approach is proposed to improve charge injection and extraction in CILs by incorporating polyphenols, trihydroxybenzoic acid (TBA). Focusing on the CIL PDINN, its work function is successfully reduced from 4.14 eV to 3.80 eV and obtained charge collection efficiency of 91.23% through TBA regulation. These enhancements can be ascribed to improved contact between the active layer and the CILs, and enhanced the formation of a fine fiber phase width and inhibited interface recombination. As a result, the power conversion efficiency (PCE) of the binary OSCs comprising PM6: BTP-ec9 exhibits an increase from 18.2% to 19.3%, placing it among the one of the highest PCE values. Moreover, this approach demonstrated notable applicability for another CILs, as well as various OSCs systems. Overall, this research underscores the importance of regulating and modifying CILs to fully exploit their potential in OSCs devices, while laying the groundwork for optimizing their efficiency and stability. © 2024 Wiley-VCH GmbH.

AB - The cathode interface layers (CILs) play a crucial role in enhancing the performance of organic solar cells (OSCs). However, challenges arise due to the high work function of CIL and inadequate contact with the active layer, leading to high interface trap recombination and poor charge extraction. In this study, a novel approach is proposed to improve charge injection and extraction in CILs by incorporating polyphenols, trihydroxybenzoic acid (TBA). Focusing on the CIL PDINN, its work function is successfully reduced from 4.14 eV to 3.80 eV and obtained charge collection efficiency of 91.23% through TBA regulation. These enhancements can be ascribed to improved contact between the active layer and the CILs, and enhanced the formation of a fine fiber phase width and inhibited interface recombination. As a result, the power conversion efficiency (PCE) of the binary OSCs comprising PM6: BTP-ec9 exhibits an increase from 18.2% to 19.3%, placing it among the one of the highest PCE values. Moreover, this approach demonstrated notable applicability for another CILs, as well as various OSCs systems. Overall, this research underscores the importance of regulating and modifying CILs to fully exploit their potential in OSCs devices, while laying the groundwork for optimizing their efficiency and stability. © 2024 Wiley-VCH GmbH.

KW - inhibited interface recombination

KW - organic solar cells

KW - regulation CIL

KW - stability

KW - TBA

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DO - 10.1002/aenm.202401741

M3 - RGC 21 - Publication in refereed journal

SN - 1614-6832

VL - 14

JO - Advanced Energy Materials

JF - Advanced Energy Materials

IS - 36

M1 - 2401741

ER -

Optimizing of Cathode Interface Layers in Organic Solar Cells Using Polyphenols: An Effective Approach

Abstract

Funding

Research Keywords

UN SDGs

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CRF: High Performance Photovoltaic Cells Integrating Perovskite and Polymers - Materials, Devices and Mechanism Studies

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