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Rational molecular passivation for high-performance perovskite light-emitting diodes

Xu, Weidong, 1988- (author)
Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten,Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, China
Hu, Qi (author)
Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, China
Bai, Sai, 1988- (author)
Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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Bao, Chunxiong, 1986- (author)
Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten,International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Shenzhen University, Shenzhen, China
Miao, Yanfeng (author)
Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, China
Yuan, Zhongcheng, 1989- (author)
Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
Borzda, Tetiana (author)
Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia, Milan, Italy
Barker, Alex J. (author)
Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia, Milan, Italy
Tyukalova, Elizaveta (author)
School of Materials Science and Engineering, Nanyang Technological University (NTU), Singapore, Singapore
Hu, Zhang-Jun, Dr. 1978- (author)
Linköpings universitet,Molekylär ytfysik och nanovetenskap,Tekniska fakulteten
Kawecki, Maciej (author)
Laboratory for Nanoscale Materials Science, Empa, Dubendorf, Switzerland; Department of Physics, University of Basel, Basel, Switzerland
Wang, Heyong, 1989- (author)
Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
Yan, Zhibo, 1980- (author)
Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten,Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, P. R. China
Liu, Xianjie, Ph.D. 1971- (author)
Linköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten
Shi, Xiaobo, 1987- (author)
Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
Uvdal, Kajsa, 1961- (author)
Linköpings universitet,Molekylär ytfysik och nanovetenskap,Tekniska fakulteten
Fahlman, Mats, 1967- (author)
Linköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten
Zhang, Wenjing (author)
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Shenzhen University, Shenzhen, China
Duchamp, Martial (author)
School of Materials Science and Engineering, Nanyang Technological University (NTU), Singapore, Singapore
Liu, Jun-Ming (author)
Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, P. R. China
Petrozza, Annamaria (author)
Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia, Milan, Italy
Wang, Jianpu (author)
Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, China
Liu, Li-Min (author)
Beijing Computational Science Research Center, Beijing, China; School of Physics, Beihang University, Beijing, China
Huang, Wei (author)
Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, China; Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), Xi’an, China
Gao, Feng, 1981- (author)
Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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 (creator_code:org_t)
2019-03-25
2019
English.
In: Nature Photonics. - : Springer Nature Publishing AG. - 1749-4885 .- 1749-4893. ; 13:6, s. 418-424
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • A major efficiency limit for solution-processed perovskite optoelectronic devices, for example light-emitting diodes, is trap-mediated non-radiative losses. Defect passivation using organic molecules has been identified as an attractive approach to tackle this issue. However, implementation of this approach has been hindered by a lack of deep understanding of how the molecular structures influence the effectiveness of passivation. We show that the so far largely ignored hydrogen bonds play a critical role in affecting the passivation. By weakening the hydrogen bonding between the passivating functional moieties and the organic cation featuring in the perovskite, we significantly enhance the interaction with defect sites and minimize non-radiative recombination losses. Consequently, we achieve exceptionally high-performance near-infrared perovskite light-emitting diodes with a record external quantum efficiency of 21.6%. In addition, our passivated perovskite light-emitting diodes maintain a high external quantum efficiency of 20.1% and a wall-plug efficiency of 11.0% at a high current density of 200 mA cm−2, making them more attractive than the most efficient organic and quantum-dot light-emitting diodes at high excitations.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

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ref (subject category)
art (subject category)

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