Spiro-Linked Planar Core Small Molecule Hole Transport Materials Enabling High-Performance Inverted Perovskite Solar Cells

Small-molecule organic semiconductors have demonstrated significant potential for application in hole-transporting materials (HTMs) for perovskite solar cells (PSCs), thanks to their high reproducibility and convenient synthesis routes. Finely designed planar π-π stacking structures have emerged as one of the primary strategies for achieving high-performance small-molecule HTMs. In particular, the incorporation of a helical structure into HTM designs through a linearization approach has proven effective, leading to the development of novel materials with superior properties. In this study, the structure-property relationship of these small molecules has been systematically explored. The newly developed HTM, SPCF-MeTPA, based on a spiro[cyclopentane-1,9'-fluorene] core, features a rigid conjugated system with spiro-linked core. This design provides improved intermolecular charge extraction and transport, optimized energy levels, and effective surface passivation compared to SPTP-MeTPA, which has a nonplanar spatial arrangement. As a result, the champion device based on SPCF-MeTPA achieves efficiencies of 26.35% (certified 25.75%) and 24.55% for aperture areas of 0.07 and 1.01 cm<sup>2</sup>, respectively. Additionally, these devices demonstrate exceptional long-term stability, further highlighting the potential of SPCF-MeTPA as a high-performance HTM.

Authors

Institutions

Publication Details

Journal
Journal of the American Chemical Society
Published
2025-05-14
DOI
https://doi.org/10.1021/jacs.5c04671
Citations
21
Primary Topic
Perovskite Materials and Applications
Type
article
Field-Weighted Citation Impact
15.34

Funders

Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
article

Spiro-Linked Planar Core Small Molecule Hole Transport Materials Enabling High-Performance Inverted Perovskite Solar Cells

Siru He, Zhixin Liu, Peide Zhu, Zonglong Song et al.
21 citations
Journal of the American Chemical Society
Perovskite Materials and Applications
15.34
article

Spiro-Linked Planar Core Small Molecule Hole Transport Materials Enabling High-Performance Inverted Perovskite Solar Cells

Siru He, Zhixin Liu, Peide Zhu, Zonglong Song, Wenbo Peng, Xingzhu Wang, Yintai Xu, Baomin Xu, Zhiwei Lei, Bo Jiang, Yitian Bao, Lida Wang, Lei Yan, Yong Zhang, Jiangfeng Wang, Deng Wang, Jie Zeng, L. Y. Pang
article en
21 citations

Abstract

Small-molecule organic semiconductors have demonstrated significant potential for application in hole-transporting materials (HTMs) for perovskite solar cells (PSCs), thanks to their high reproducibility and convenient synthesis routes. Finely designed planar π-π stacking structures have emerged as one of the primary strategies for achieving high-performance small-molecule HTMs. In particular, the incorporation of a helical structure into HTM designs through a linearization approach has proven effective, leading to the development of novel materials with superior properties. In this study, the structure-property relationship of these small molecules has been systematically explored. The newly developed HTM, SPCF-MeTPA, based on a spiro[cyclopentane-1,9'-fluorene] core, features a rigid conjugated system with spiro-linked core. This design provides improved intermolecular charge extraction and transport, optimized energy levels, and effective surface passivation compared to SPTP-MeTPA, which has a nonplanar spatial arrangement. As a result, the champion device based on SPCF-MeTPA achieves efficiencies of 26.35% (certified 25.75%) and 24.55% for aperture areas of 0.07 and 1.01 cm<sup>2</sup>, respectively. Additionally, these devices demonstrate exceptional long-term stability, further highlighting the potential of SPCF-MeTPA as a high-performance HTM.

Journal of the American Chemical SocietyVol. 147(21)
Energy Institute (GB), Southern University of Science and Technology (CN), Vi Technology (United States) (US), Energy Storage Systems (United States) (US), Xiangtan University (CN), University of South China (CN)
National Natural Science Foundation of China, Natural Science Foundation of Hunan Province, Science, Technology and Innovation Commission of Shenzhen Municipality, Southern University of Science and Technology, National Key Research and Development Program of China, Basic and Applied Basic Research Foundation of Guangdong Province
Affordable and clean energy
Openalex Percentile: Top 1%
Perovskite Materials and Applications
15.34
DOISourceOpenAlex
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.