Improving Charge Extraction and Operational Stability in Inverted Perovskite Solar Cells with Conjugated Block Copolymers

Lei Yang; Chenglin Yang; Wenjuan Wei; Jiali Weng; Jikai Lv; Mingyan Zhan; Yanan Wei; Zheng Tang; Xiaopeng Zheng; Hui Huang

doi:10.1002/anie.202509065

Improving Charge Extraction and Operational Stability in Inverted Perovskite Solar Cells with Conjugated Block Copolymers

Lei Yang (Co-first Author)
, Chenglin Yang (Co-first Author)
, Wenjuan Wei^*
, Jiali Weng
, Jikai Lv
, Mingyan Zhan
, Yanan Wei
, Zheng Tang
, Xiaopeng Zheng^*
, Hui Huang^*

^*Corresponding author for this work

Department of Chemistry

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

5 Citations (Scopus)

Abstract

A defect-passivated, electronically benign interface is essential for high-performance, stable perovskite solar cells (PSCs). Most conventional surface passivation strategies frequently introduce electrically resistive interlayers that compromise charge transport/extraction between the perovskite and charge-transport layers. We resolve this challenge through the rational implementation of all-conjugated block copolymers (CBCPs). The CBCPs demonstrate dual-functional capabilities of offering charge transport channels while facile integrating multiple defect-passivating moieties, thereby enabling efficient charge carrier transport and defect passivation. This dual-functional synergy yielded a power conversion efficiency (PCE) of 26.11% in our best device. The target PSCs maintained >90% of their initial PCEs after maximum power point tracking for >1400 hours at 65 °C. This approach offers a promising strategy for interface engineering that improves both charge extraction and defect reduction using conjugated block copolymers. © 2025 Wiley-VCH GmbH.

Original language	English
Article number	e202509065
Journal	Angewandte Chemie - International Edition
Volume	64
Issue number	40
Online published	13 Aug 2025
DOIs	https://doi.org/10.1002/anie.202509065
Publication status	Published - 26 Sept 2025

Funding

The authors thank the financial support from the NSFC (52120105006), National Key R&D Program of China (2024YFB3614300), the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDB0520103), the Fundamental Research Funds for the Central Universities, and University of Chinese Academy of Sciences. C.Y. and X.Z. acknowledge funding from the NSFC (22409197) and the Project of Talent Cultivation for Carbon Peak and Carbon Neutrality of the University of Chinese of Academy of Science.

UN SDGs

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

SDG 7 Affordable and Clean Energy

Research Keywords

Passivation
Perovskite
Polymer
Solar Cells
Stability

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title = "Improving Charge Extraction and Operational Stability in Inverted Perovskite Solar Cells with Conjugated Block Copolymers",

abstract = "A defect-passivated, electronically benign interface is essential for high-performance, stable perovskite solar cells (PSCs). Most conventional surface passivation strategies frequently introduce electrically resistive interlayers that compromise charge transport/extraction between the perovskite and charge-transport layers. We resolve this challenge through the rational implementation of all-conjugated block copolymers (CBCPs). The CBCPs demonstrate dual-functional capabilities of offering charge transport channels while facile integrating multiple defect-passivating moieties, thereby enabling efficient charge carrier transport and defect passivation. This dual-functional synergy yielded a power conversion efficiency (PCE) of 26.11\% in our best device. The target PSCs maintained >90\% of their initial PCEs after maximum power point tracking for >1400 hours at 65 °C. This approach offers a promising strategy for interface engineering that improves both charge extraction and defect reduction using conjugated block copolymers. {\textcopyright} 2025 Wiley-VCH GmbH.",

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Improving Charge Extraction and Operational Stability in Inverted Perovskite Solar Cells with Conjugated Block Copolymers. / Yang, Lei (Co-first Author); Yang, Chenglin (Co-first Author); Wei, Wenjuan et al.
In: Angewandte Chemie - International Edition, Vol. 64, No. 40, e202509065, 26.09.2025.

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

TY - JOUR

T1 - Improving Charge Extraction and Operational Stability in Inverted Perovskite Solar Cells with Conjugated Block Copolymers

AU - Yang, Lei

AU - Yang, Chenglin

AU - Wei, Wenjuan

AU - Weng, Jiali

AU - Lv, Jikai

AU - Zhan, Mingyan

AU - Wei, Yanan

AU - Tang, Zheng

AU - Zheng, Xiaopeng

AU - Huang, Hui

PY - 2025/9/26

Y1 - 2025/9/26

N2 - A defect-passivated, electronically benign interface is essential for high-performance, stable perovskite solar cells (PSCs). Most conventional surface passivation strategies frequently introduce electrically resistive interlayers that compromise charge transport/extraction between the perovskite and charge-transport layers. We resolve this challenge through the rational implementation of all-conjugated block copolymers (CBCPs). The CBCPs demonstrate dual-functional capabilities of offering charge transport channels while facile integrating multiple defect-passivating moieties, thereby enabling efficient charge carrier transport and defect passivation. This dual-functional synergy yielded a power conversion efficiency (PCE) of 26.11% in our best device. The target PSCs maintained >90% of their initial PCEs after maximum power point tracking for >1400 hours at 65 °C. This approach offers a promising strategy for interface engineering that improves both charge extraction and defect reduction using conjugated block copolymers. © 2025 Wiley-VCH GmbH.

AB - A defect-passivated, electronically benign interface is essential for high-performance, stable perovskite solar cells (PSCs). Most conventional surface passivation strategies frequently introduce electrically resistive interlayers that compromise charge transport/extraction between the perovskite and charge-transport layers. We resolve this challenge through the rational implementation of all-conjugated block copolymers (CBCPs). The CBCPs demonstrate dual-functional capabilities of offering charge transport channels while facile integrating multiple defect-passivating moieties, thereby enabling efficient charge carrier transport and defect passivation. This dual-functional synergy yielded a power conversion efficiency (PCE) of 26.11% in our best device. The target PSCs maintained >90% of their initial PCEs after maximum power point tracking for >1400 hours at 65 °C. This approach offers a promising strategy for interface engineering that improves both charge extraction and defect reduction using conjugated block copolymers. © 2025 Wiley-VCH GmbH.

KW - Passivation

KW - Perovskite

KW - Polymer

KW - Solar Cells

KW - Stability

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U2 - 10.1002/anie.202509065

DO - 10.1002/anie.202509065

M3 - RGC 21 - Publication in refereed journal

C2 - 40801380

SN - 1433-7851

VL - 64

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 40

M1 - e202509065

ER -

Improving Charge Extraction and Operational Stability in Inverted Perovskite Solar Cells with Conjugated Block Copolymers

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