Matrix Manipulation of Directly‐Synthesized PbS Quantum Dot Inks Enabled by Coordination Engineering
Fei LiInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaYang LiuInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaGuozheng ShiInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaWei ChenDepartment of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen 518055 ChinaRenjun GuoPhysik‐Department Lehrstuhl für Funktionelle Materialien Technische Universität München James‐Franck‐Straße 1 85748 Garching GermanyDong LiuFaculty of Informatics and Engineering The University of Electro‐Communications Tokyo 182‐8585 JapanYaohong ZhangFaculty of Informatics and Engineering The University of Electro‐Communications Tokyo 182‐8585 JapanYongjie WangInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaXing MengInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaXuliang ZhangInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaYou LvInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaWei DengInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaQing ZhangVacuum Interconnected Nanotech Workstation Suzhou Institute of Nano‐Tech and Nano‐Bionics Chinese Academy of Sciences Suzhou 215123 ChinaYao ShiInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaYifan ChenInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaKai WangDepartment of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen 518055 ChinaQing ShenFaculty of Informatics and Engineering The University of Electro‐Communications Tokyo 182‐8585 JapanZeke LiuInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 ChinaPeter Müller‐BuschbaumHeinz Maier‐Leibnitz Zentrum (MLZ) Technische Universität München Lichtenbergstraße 1 85748 Garching GermanyWanli MaInstitute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 China
2021en
ABI
Аннотация
Abstract The direct‐synthesis of conductive PbS quantum dot (QD) ink is facile, scalable, and low‐cost, boosting the future commercialization of optoelectronics based on colloidal QDs. However, manipulating the QD matrix structures still is a challenge, which limits the corresponding QD solar cell performance. Here, for the first time a coordination‐engineering strategy to finely adjust the matrix thickness around the QDs is presented, in which halogen salts are introduced into the reaction to convert the excessive insulating lead iodide into soluble iodoplumbate species. As a result, the obtained QD film exhibits shrunk insulating shells, leading to higher charge carrier transport and superior surface passivation compared to the control devices. A significantly improved power‐conversion efficiency from 10.52% to 12.12% can be achieved after the matrix engineering. Therefore, the work shows high significance in promoting the practical application of directly synthesized PbS QD inks in large‐area low‐cost optoelectronic devices.
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