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journal article·2024-08Open access

Inhibiting Interfacial Nonradiative Recombination in Inverted Perovskite Solar Cells with a Multifunctional Molecule

Jiaxin Wu, Rui Zhu, Guixiang Li, Zuhong Zhang, Jorge Pascual, Hongzhuo Wu, Mahmoud H. Aldamasy, Luyao Wang, Zhenhuang Su, Silver‐Hamill Turren‐Cruz, Rajarshi Roy, Fahad A Alharthi, Ali Alsalme, Junhan Zhang, Xingyu Gao, Michael Saliba, Antonio Abate, Meng Li

Advanced Materials· Volume 36· Issue 35
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Abstract

Abstract Interface‐induced nonradiative recombination losses at the perovskite/electron transport layer (ETL) are an impediment to improving the efficiency and stability of inverted (p‐i‐n) perovskite solar cells (PSCs). Tridecafluorohexane‐1‐sulfonic acid potassium (TFHSP) is employed as a multifunctional dipole molecule to modify the perovskite surface. The solid coordination and hydrogen bonding efficiently passivate the surface defects, thereby reducing nonradiative recombination. The induced positive dipole layer between the perovskite and ETLs improves the energy band alignment, enhancing interface charge extraction. Additionally, the strong interaction between TFHSP and the perovskite stabilizes the perovskite surface, while the hydrophobic fluorinated moieties prevent the ingress of water and oxygen, enhancing the device stability. The resultant devices achieve a power conversion efficiency (PCE) of 24.6%. The unencapsulated devices retain 91% of their initial efficiency after 1000 h in air with 60% relative humidity, and 95% after 500 h under maximum power point (MPP) tracking at 35 °C. The utilization of multifunctional dipole molecules opens new avenues for high‐performance and long‐term stable perovskite devices.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Lab for Special Functional Materials of Ministry of Education National & Local Joint Engineering Research Center for High‐efficiency Display and Lighting Technology School of Nanoscience and Materials Engineering Collaborative Innovation Center of Nano Functional Materials and Applications Henan University Kaifeng 475004 P. R. China

Helmholtz‐Zentrum Berlin für Materialien und Energie GmbH Hahn‐Meitner‐Platz 1 14109 Berlin Germany

POLYMAT Centro Joxe Mari Korta Center University of the Basque Country UPV/EHU Tolosa Avenue, 72 Donostia‐San Sebastián 20018 Spain

Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Advanced Research Institute Chinese Academy of Sciences 239 Zhangheng Road Shanghai 201204 P. R. China

Instituto de Ciencia de los Materiales (ICMUV) Universidad de Valencia C/Catedrático José Beltrán 2 Paterna E‐46980 Spain

Institute for Photovoltaics University of Stuttgart Pfaffenwaldring 47 70569 Stuttgart Germany

Department of Chemistry College of Science King Saud University Riyadh 11451 Kingdom of Saudi Arabia

Funding

China Postdoctoral Science Foundation · National Natural Science Foundation of China · Henan Provincial Science and Technology Research Project

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