Dopant-Free Small-Molecule Hole-Transporting Material for Inverted Perovskite Solar Cells with Efficiency Exceeding 21%

Yang Wang; Wei Chen; Lei Wang; Bao Tu; Tian Chen; Bin Liu; Kun Yang; Chang Woo Koh; Xianhe Zhang; Huiliang Sun; Guocong Chen; Xiyuan Feng; Han Young Woo; Aleksandra B. Djurišić; Zhubing He; Xugang Guo

doi:10.1002/adma.201902781

Dopant-Free Small-Molecule Hole-Transporting Material for Inverted Perovskite Solar Cells with Efficiency Exceeding 21%

Yang Wang
, Wei Chen
, Lei Wang
, Bao Tu
, Tian Chen
, Bin Liu
, Kun Yang
, Chang Woo Koh
, Xianhe Zhang
, Huiliang Sun
, Guocong Chen
, Xiyuan Feng
, Han Young Woo
, Aleksandra B. Djurišić^*
, Zhubing He
, Xugang Guo

^*Corresponding author for this work

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

339 Citations (Scopus)

Abstract

Hole-transporting materials (HTMs) play a critical role in realizing efficient and stable perovskite solar cells (PVSCs). Considering their capability of enabling PVSCs with good device reproducibility and long-term stability, high-performance dopant-free small-molecule HTMs (SM-HTMs) are greatly desired. However, such dopant-free SM-HTMs are highly elusive, limiting the current record efficiencies of inverted PVSCs to around 19%. Here, two novel donor–acceptor-type SM-HTMs (MPA-BTI and MPA-BTTI) are devised, which synergistically integrate several design principles for high-performance HTMs, and exhibit comparable optoelectronic properties but distinct molecular configuration and film properties. Consequently, the dopant-free MPA-BTTI-based inverted PVSCs achieve a remarkable efficiency of 21.17% with negligible hysteresis and superior thermal stability and long-term stability under illumination, which breaks the long-time standing bottleneck in the development of dopant-free SM-HTMs for highly efficient inverted PVSCs. Such a breakthrough is attributed to the well-aligned energy levels, appropriate hole mobility, and most importantly, the excellent film morphology of the MPA-BTTI. The results underscore the effectiveness of the design tactics, providing a new avenue for developing high-performance dopant-free SM-HTMs in PVSCs.

Original language	English
Article number	1902781
Journal	Advanced Materials
Volume	31
Issue number	35
DOIs	https://doi.org/10.1002/adma.201902781
Publication status	Published - 2019 Aug

Bibliographical note

Funding Information:
Y.W. and W.C. contributed equally to this work. Y.W. acknowledges the financial support by the China Postdoctoral Science Foundation (No. 2018M630267), the National Natural Science Foundation of China (No. 21805128), and the SUSTech Presidential Postdoctoral Fellowship. H.S. thanks the National Natural Science Foundation of China (No. 21801124). X.G. is grateful to the National Natural Science Foundation of China (51573076) and the Shenzhen Basic Research Fund (JCYJ20170817105905899). Z.H. acknowledges the financial support of the National Natural Science Foundation of China (No. 61775091), the Natural Science Foundation of Shenzhen Innovation Committee (JCYJ20180504165851864), and the Shenzhen Key Laboratory Project (No. ZDSYS201602261933302). A.B.D. acknowledges support from the Shenzhen Innovation Committee (JCYJ20170818141216288) and the Seed Funding for Strategic Interdisciplinary Research Scheme of the University of Hong Kong. H.Y.W. acknowledges the financial support from the NRF of Korea (2016M1A2A2940911 and 2015M1A2A2057506).

Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

device stability
donor–acceptor small molecules
dopant-free hole-transporting materials
inverted perovskite solar cells

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1002/adma.201902781

Cite this

Wang, Y., Chen, W., Wang, L., Tu, B., Chen, T., Liu, B., Yang, K., Koh, C. W., Zhang, X., Sun, H., Chen, G., Feng, X., Woo, H. Y., Djurišić, A. B., He, Z., & Guo, X. (2019). Dopant-Free Small-Molecule Hole-Transporting Material for Inverted Perovskite Solar Cells with Efficiency Exceeding 21%. Advanced Materials, 31(35), Article 1902781. https://doi.org/10.1002/adma.201902781

@article{a415d6d4b44c4e6399be515179d17856,

title = "Dopant-Free Small-Molecule Hole-Transporting Material for Inverted Perovskite Solar Cells with Efficiency Exceeding 21\%",

abstract = "Hole-transporting materials (HTMs) play a critical role in realizing efficient and stable perovskite solar cells (PVSCs). Considering their capability of enabling PVSCs with good device reproducibility and long-term stability, high-performance dopant-free small-molecule HTMs (SM-HTMs) are greatly desired. However, such dopant-free SM-HTMs are highly elusive, limiting the current record efficiencies of inverted PVSCs to around 19\%. Here, two novel donor–acceptor-type SM-HTMs (MPA-BTI and MPA-BTTI) are devised, which synergistically integrate several design principles for high-performance HTMs, and exhibit comparable optoelectronic properties but distinct molecular configuration and film properties. Consequently, the dopant-free MPA-BTTI-based inverted PVSCs achieve a remarkable efficiency of 21.17\% with negligible hysteresis and superior thermal stability and long-term stability under illumination, which breaks the long-time standing bottleneck in the development of dopant-free SM-HTMs for highly efficient inverted PVSCs. Such a breakthrough is attributed to the well-aligned energy levels, appropriate hole mobility, and most importantly, the excellent film morphology of the MPA-BTTI. The results underscore the effectiveness of the design tactics, providing a new avenue for developing high-performance dopant-free SM-HTMs in PVSCs.",

keywords = "device stability, donor–acceptor small molecules, dopant-free hole-transporting materials, inverted perovskite solar cells",

author = "Yang Wang and Wei Chen and Lei Wang and Bao Tu and Tian Chen and Bin Liu and Kun Yang and Koh, \{Chang Woo\} and Xianhe Zhang and Huiliang Sun and Guocong Chen and Xiyuan Feng and Woo, \{Han Young\} and Djuri{\v s}i{\'c}, \{Aleksandra B.\} and Zhubing He and Xugang Guo",

note = "Funding Information: Y.W. and W.C. contributed equally to this work. Y.W. acknowledges the financial support by the China Postdoctoral Science Foundation (No. 2018M630267), the National Natural Science Foundation of China (No. 21805128), and the SUSTech Presidential Postdoctoral Fellowship. H.S. thanks the National Natural Science Foundation of China (No. 21801124). X.G. is grateful to the National Natural Science Foundation of China (51573076) and the Shenzhen Basic Research Fund (JCYJ20170817105905899). Z.H. acknowledges the financial support of the National Natural Science Foundation of China (No. 61775091), the Natural Science Foundation of Shenzhen Innovation Committee (JCYJ20180504165851864), and the Shenzhen Key Laboratory Project (No. ZDSYS201602261933302). A.B.D. acknowledges support from the Shenzhen Innovation Committee (JCYJ20170818141216288) and the Seed Funding for Strategic Interdisciplinary Research Scheme of the University of Hong Kong. H.Y.W. acknowledges the financial support from the NRF of Korea (2016M1A2A2940911 and 2015M1A2A2057506). Publisher Copyright: {\textcopyright} 2019 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2019",

month = aug,

doi = "10.1002/adma.201902781",

language = "English",

volume = "31",

journal = "Advanced Materials",

issn = "0935-9648",

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number = "35",

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T1 - Dopant-Free Small-Molecule Hole-Transporting Material for Inverted Perovskite Solar Cells with Efficiency Exceeding 21%

AU - Wang, Yang

AU - Chen, Wei

AU - Wang, Lei

AU - Tu, Bao

AU - Chen, Tian

AU - Liu, Bin

AU - Yang, Kun

AU - Koh, Chang Woo

AU - Zhang, Xianhe

AU - Sun, Huiliang

AU - Chen, Guocong

AU - Feng, Xiyuan

AU - Woo, Han Young

AU - Djurišić, Aleksandra B.

AU - He, Zhubing

AU - Guo, Xugang

N1 - Funding Information: Y.W. and W.C. contributed equally to this work. Y.W. acknowledges the financial support by the China Postdoctoral Science Foundation (No. 2018M630267), the National Natural Science Foundation of China (No. 21805128), and the SUSTech Presidential Postdoctoral Fellowship. H.S. thanks the National Natural Science Foundation of China (No. 21801124). X.G. is grateful to the National Natural Science Foundation of China (51573076) and the Shenzhen Basic Research Fund (JCYJ20170817105905899). Z.H. acknowledges the financial support of the National Natural Science Foundation of China (No. 61775091), the Natural Science Foundation of Shenzhen Innovation Committee (JCYJ20180504165851864), and the Shenzhen Key Laboratory Project (No. ZDSYS201602261933302). A.B.D. acknowledges support from the Shenzhen Innovation Committee (JCYJ20170818141216288) and the Seed Funding for Strategic Interdisciplinary Research Scheme of the University of Hong Kong. H.Y.W. acknowledges the financial support from the NRF of Korea (2016M1A2A2940911 and 2015M1A2A2057506). Publisher Copyright: © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2019/8

Y1 - 2019/8

N2 - Hole-transporting materials (HTMs) play a critical role in realizing efficient and stable perovskite solar cells (PVSCs). Considering their capability of enabling PVSCs with good device reproducibility and long-term stability, high-performance dopant-free small-molecule HTMs (SM-HTMs) are greatly desired. However, such dopant-free SM-HTMs are highly elusive, limiting the current record efficiencies of inverted PVSCs to around 19%. Here, two novel donor–acceptor-type SM-HTMs (MPA-BTI and MPA-BTTI) are devised, which synergistically integrate several design principles for high-performance HTMs, and exhibit comparable optoelectronic properties but distinct molecular configuration and film properties. Consequently, the dopant-free MPA-BTTI-based inverted PVSCs achieve a remarkable efficiency of 21.17% with negligible hysteresis and superior thermal stability and long-term stability under illumination, which breaks the long-time standing bottleneck in the development of dopant-free SM-HTMs for highly efficient inverted PVSCs. Such a breakthrough is attributed to the well-aligned energy levels, appropriate hole mobility, and most importantly, the excellent film morphology of the MPA-BTTI. The results underscore the effectiveness of the design tactics, providing a new avenue for developing high-performance dopant-free SM-HTMs in PVSCs.

AB - Hole-transporting materials (HTMs) play a critical role in realizing efficient and stable perovskite solar cells (PVSCs). Considering their capability of enabling PVSCs with good device reproducibility and long-term stability, high-performance dopant-free small-molecule HTMs (SM-HTMs) are greatly desired. However, such dopant-free SM-HTMs are highly elusive, limiting the current record efficiencies of inverted PVSCs to around 19%. Here, two novel donor–acceptor-type SM-HTMs (MPA-BTI and MPA-BTTI) are devised, which synergistically integrate several design principles for high-performance HTMs, and exhibit comparable optoelectronic properties but distinct molecular configuration and film properties. Consequently, the dopant-free MPA-BTTI-based inverted PVSCs achieve a remarkable efficiency of 21.17% with negligible hysteresis and superior thermal stability and long-term stability under illumination, which breaks the long-time standing bottleneck in the development of dopant-free SM-HTMs for highly efficient inverted PVSCs. Such a breakthrough is attributed to the well-aligned energy levels, appropriate hole mobility, and most importantly, the excellent film morphology of the MPA-BTTI. The results underscore the effectiveness of the design tactics, providing a new avenue for developing high-performance dopant-free SM-HTMs in PVSCs.

KW - device stability

KW - donor–acceptor small molecules

KW - dopant-free hole-transporting materials

KW - inverted perovskite solar cells

UR - https://www.scopus.com/pages/publications/85068778825

U2 - 10.1002/adma.201902781

DO - 10.1002/adma.201902781

M3 - Article

C2 - 31292989

AN - SCOPUS:85068778825

SN - 0935-9648

VL - 31

JO - Advanced Materials

JF - Advanced Materials

IS - 35

M1 - 1902781

ER -

Dopant-Free Small-Molecule Hole-Transporting Material for Inverted Perovskite Solar Cells with Efficiency Exceeding 21%

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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