Статья

Over 15% Efficiency PbS Quantum‐Dot Solar Cells by Synergistic Effects of Three Interface Engineering: Reducing Nonradiative Recombination and Balancing Charge Carrier Extraction

Chao DingFaculty of Informatics and Engineering The University of Electro‐Communications 1‐5‐1 Chofugaoka, Chofu Tokyo 182‐8585 JapanDandan WangFaculty of Informatics and Engineering The University of Electro‐Communications 1‐5‐1 Chofugaoka, Chofu Tokyo 182‐8585 JapanDong LiuFaculty of Informatics and Engineering The University of Electro‐Communications 1‐5‐1 Chofugaoka, Chofu Tokyo 182‐8585 JapanHua LiFaculty of Informatics and Engineering The University of Electro‐Communications 1‐5‐1 Chofugaoka, Chofu Tokyo 182‐8585 JapanYusheng LiFaculty of Informatics and Engineering The University of Electro‐Communications 1‐5‐1 Chofugaoka, Chofu Tokyo 182‐8585 JapanShuzi HayaseInfo‐Powered Energy System Research Center (i‐PERC) The University of Electro‐Communications 1‐5‐1 Chofugaoka, Chofu Tokyo 182‐8585 JapanTomah SogabeFaculty of Informatics and Engineering The University of Electro‐Communications 1‐5‐1 Chofugaoka, Chofu Tokyo 182‐8585 JapanTaizo MasudaCN development division Toyota Motor Corporation Susono Shizuoka 410–1193 JapanYong ZhouEco‐Materials and Renewable Energy Research Center (ERERC) Jiangsu Key Laboratory for Nano Technology Nanjing University Nanjing 210093 ChinaYingfang YaoEco‐Materials and Renewable Energy Research Center (ERERC) Jiangsu Key Laboratory for Nano Technology Nanjing University Nanjing 210093 ChinaZhigang ZouEco‐Materials and Renewable Energy Research Center (ERERC) Jiangsu Key Laboratory for Nano Technology Nanjing University Nanjing 210093 ChinaRuixiang WangBeijing Engineering Research Centre of Sustainable Energy and Buildings Beijing University of Civil Engineering and Architecture No. 15 Yongyuan Road, Huangcun, Daxing Beijing 102616 ChinaQing ShenFaculty of Informatics and Engineering The University of Electro‐Communications 1‐5‐1 Chofugaoka, Chofu Tokyo 182‐8585 Japan

2022en

ABI

Аннотация

Abstract Lead sulfide colloidal quantum dot solar cells (CQDSCs), the next generation of photovoltaics, are hampered by non‐radiative recombination induced by defects and an electron‐hole extraction imbalance. CQDSCs have three interfaces: CQD/CQD, electron transport layer (ETL)/CQD, and CQD/hole transport layer (HTL), and modifying one of these interfaces does not fix the problem stated above. Here, coordinated control and passivation of the three interfaces in PbS CQDSCs are presented and it is shown that the synergistic effects may improve charge transport and charge carrier extraction balance and minimize non‐radiative recombination simultaneously. A facile method is developed for epitaxially growing an ultrathin perovskite shell on the CQD surface to passivate the CQD/CQD interface, resulting in CQD absorber layers with long carrier diffusion lengths. With the introduction of organic films with adjustable electrical characteristics, the influence of ETL/CQD interfacial modifications on carrier transport and recombination is investigated. An excessive increase in the electron extraction rate reduces the fill factor and solar efficiency, as discovered. Therefore a modified layer is created at the CQD/HTL interface to promote hole extraction, which enhances charge extraction balance and passivates the interface. Finally, PbS CQDSCs exhibit a power conversion efficiency of 15.45%, a record for Pb chalcogenide CQDSCs.

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Идентификаторы

DOI: 10.1002/aenm.202201676

Цитирования и источники

Цитирований: 3Использованных источников: 0

Показатели — AkademScholar