Synergistic Dipole-Defect Engineering via Sulfonic Molecular Bridge Boosts Voltage in Wide-Bandgap Perovskite and All-Perovskite Tandem Solar Cells
Source abstract
Abstract
Interfacial electric field engineering unlocks high-performance wide-bandgap (WBG) perovskite solar cells (PSCs) for all-perovskite tandem architectures. We introduce 3-sulfopropyl methacrylate potassium salt (SPM), a sulfur-based molecular modulator that creates a dipole-induced built-in electric field at the perovskite/C 60 interface while enabling a synergistic regulation of dual-site defect passivation. The vertically aligned sulfonic (−SO 3 – ) groups in SPM generate an enhanced interfacial dipole, accelerating charge separation. Moreover, the dual Lewis base sites in SPM interact with uncoordinated Pb 2+ via lead–oxygen coordination, healing defects, suppressing ion migration, and inhibiting phase segregation. The optimized 1.77 eV-WBG PSCs demonstrate an efficiency of 19.48% with a V OC of 1.350 V, corresponding to a low V OC -deficit of 0.420 V. Integrating the dipole-optimized top subcell into all-perovskite tandem solar cells achieves a champion efficiency of 28.90% alongside a high V OC of 2.158 V.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China
Soochow University
Ningbo Institute of Materials Technology and Engineering
Chinese Academy of Sciences, Ningbo New Materials Testing and Evaluation Center CO. Ltd.
College of Materials Science and Engineering & Institute of New Energy and Low-Carbon Technology, Engineering Research Center of Alternative Energy Materials & Devices of Ministry of Education
Sichuan University
Funding
Sichuan University · Natural Science Research of Jiangsu Higher Education Institutions of China · National Key Research and Development Program of China · National Natural Science Foundation of China · Tang Scholar
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