Interfacial engineering via dipolar fullerene derivative for efficient tin halide perovskite indoor photovoltaics

Modulating hot carrier dynamics is crucial in tin halide perovskite photovoltaics, particularly under indoor illumination with limited photon flux. Herein, a fullerene derivative bearing four piperazine groups (denoted as TPPC) is synthesized to engineer the perovskite/C<sub>60</sub> interface. The TPPC molecule exhibits a dipole moment of 1.97 Debye, leading to enhanced adsorption energy on perovskite surface and robust interfacial interaction. The newly formed surface dipole optimizes the interfacial energy level alignment via a cascade gradient, enabling modulation of interfacial hot carrier dynamics. Consequently, TPPC-treated photovoltaic devices achieve a champion power conversion efficiency (PCE) of 22.49% and a maximum output power density (P<sub>out</sub>) of 64.1 μW cm<sup>-2</sup> under white light-emitting diode illumination (3000 K, 1000 lux, 285 μW cm<sup>-2</sup>). Large-area (1.21 cm<sup>2</sup>) devices attain a PCE of 17.94% (certified: 15.93%) and a maximum P<sub>out</sub> of 51.2 μW cm<sup>-2</sup> under the same illumination conditions.

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Publication Details

Journal
Nature Communications
Published
2026-01-21
DOI
https://doi.org/10.1038/s41467-026-68719-3
Primary Topic
Perovskite Materials and Applications
Type
article
Field-Weighted Citation Impact
0.00

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article

Interfacial engineering via dipolar fullerene derivative for efficient tin halide perovskite indoor photovoltaics

Xian-Mei Meng, Tianhua Liu, Enhao Cui, Jin Li et al.
Nature Communications
Perovskite Materials and Applications
article

Interfacial engineering via dipolar fullerene derivative for efficient tin halide perovskite indoor photovoltaics

Xian-Mei Meng, Tianhua Liu, Enhao Cui, Jin Li, Junjie Huang, Muhammad Abdel‐Shakour, H. Xiao, Junfang Wang
article en

Abstract

Modulating hot carrier dynamics is crucial in tin halide perovskite photovoltaics, particularly under indoor illumination with limited photon flux. Herein, a fullerene derivative bearing four piperazine groups (denoted as TPPC) is synthesized to engineer the perovskite/C<sub>60</sub> interface. The TPPC molecule exhibits a dipole moment of 1.97 Debye, leading to enhanced adsorption energy on perovskite surface and robust interfacial interaction. The newly formed surface dipole optimizes the interfacial energy level alignment via a cascade gradient, enabling modulation of interfacial hot carrier dynamics. Consequently, TPPC-treated photovoltaic devices achieve a champion power conversion efficiency (PCE) of 22.49% and a maximum output power density (P<sub>out</sub>) of 64.1 μW cm<sup>-2</sup> under white light-emitting diode illumination (3000 K, 1000 lux, 285 μW cm<sup>-2</sup>). Large-area (1.21 cm<sup>2</sup>) devices attain a PCE of 17.94% (certified: 15.93%) and a maximum P<sub>out</sub> of 51.2 μW cm<sup>-2</sup> under the same illumination conditions.

Nature CommunicationsVol. 17(1)
University of Electronic Science and Technology of China (CN), City University of Hong Kong (HK), Beijing National Laboratory for Molecular Sciences (CN), National Engineering Research Center of Electromagnetic Radiation Control Materials (CN), University of Chinese Academy of Sciences (CN), Assiut University (EG)
National Natural Science Foundation of China, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Fundamental Research Funds for the Central Universities
Affordable and clean energy
Openalex Percentile: Top 80%
Perovskite Materials and Applications
DOIOpen Access PDFOpenAlex
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