Shixuan Wang, Qiang Fu, Ting Zheng, Xu Han, Hao Wang, Tao Zhou, Jing Liu, Tianqi Liu, Yuwei Zhang, Kaiqi Chen, Qixing Wang, Zhexing Duan, Xin Zhou, Kenji Watanabe, Takashi Taniguchi, Jiaxu Yan, Yuan Huang, Yuwei Xiong, Joel K. W. Yang, Zhenliang Hu, Tao Xu, Litao Sun, Jinhua Hong, Yujie Zheng, Yumeng You, Qi Zhang, Junpeng Lu, Zhenhua Ni
{"title":"基于插层过渡金属二卤化物的发光二极管,在高发电率下可抑制效率衰减","authors":"Shixuan Wang, Qiang Fu, Ting Zheng, Xu Han, Hao Wang, Tao Zhou, Jing Liu, Tianqi Liu, Yuwei Zhang, Kaiqi Chen, Qixing Wang, Zhexing Duan, Xin Zhou, Kenji Watanabe, Takashi Taniguchi, Jiaxu Yan, Yuan Huang, Yuwei Xiong, Joel K. W. Yang, Zhenliang Hu, Tao Xu, Litao Sun, Jinhua Hong, Yujie Zheng, Yumeng You, Qi Zhang, Junpeng Lu, Zhenhua Ni","doi":"10.1038/s41928-024-01264-3","DOIUrl":null,"url":null,"abstract":"<p>The capabilities of light-emitting diodes (LEDs) based on two-dimensional materials are restricted by efficiency roll-off, which is induced by exciton–exciton annihilation, at high current densities. Dielectric or strain engineering can be used to reduce exciton–exciton annihilation rates in monolayer transition metal dichalcogenides, but achieving electroluminescence in two-dimensional LEDs without efficiency roll-off is challenging. Here we describe pulsed LEDs that are based on intercalated transition metal dichalcogenides and offer suppressed exciton–exciton annihilation at high exciton generation rates. We intercalate oxygen plasma into few-layer molybdenum disulfide (MoS<sub>2</sub>) and tungsten disulfide (WS<sub>2</sub>) to create LEDs with a suppressed efficiency roll-off in both photo-excitation and electro-injection luminescence at all exciton densities up to around 10<sup>20</sup> cm<sup>−2</sup> s<sup>−1</sup>. We attribute this suppression to a reduced exciton Bohr radius and exciton diffusion coefficient, as extracted from optical spectroscopy measurements. LEDs based on intercalated MoS<sub>2</sub> and WS<sub>2</sub> operate at maximum external quantum efficiencies of 0.02% and 0.78%, respectively, at a generation rate of around 10<sup>20</sup> cm<sup>−2</sup> s<sup>−1</sup>.</p>","PeriodicalId":19064,"journal":{"name":"Nature Electronics","volume":null,"pages":null},"PeriodicalIF":33.7000,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Light-emitting diodes based on intercalated transition metal dichalcogenides with suppressed efficiency roll-off at high generation rates\",\"authors\":\"Shixuan Wang, Qiang Fu, Ting Zheng, Xu Han, Hao Wang, Tao Zhou, Jing Liu, Tianqi Liu, Yuwei Zhang, Kaiqi Chen, Qixing Wang, Zhexing Duan, Xin Zhou, Kenji Watanabe, Takashi Taniguchi, Jiaxu Yan, Yuan Huang, Yuwei Xiong, Joel K. W. Yang, Zhenliang Hu, Tao Xu, Litao Sun, Jinhua Hong, Yujie Zheng, Yumeng You, Qi Zhang, Junpeng Lu, Zhenhua Ni\",\"doi\":\"10.1038/s41928-024-01264-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The capabilities of light-emitting diodes (LEDs) based on two-dimensional materials are restricted by efficiency roll-off, which is induced by exciton–exciton annihilation, at high current densities. Dielectric or strain engineering can be used to reduce exciton–exciton annihilation rates in monolayer transition metal dichalcogenides, but achieving electroluminescence in two-dimensional LEDs without efficiency roll-off is challenging. Here we describe pulsed LEDs that are based on intercalated transition metal dichalcogenides and offer suppressed exciton–exciton annihilation at high exciton generation rates. 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Light-emitting diodes based on intercalated transition metal dichalcogenides with suppressed efficiency roll-off at high generation rates
The capabilities of light-emitting diodes (LEDs) based on two-dimensional materials are restricted by efficiency roll-off, which is induced by exciton–exciton annihilation, at high current densities. Dielectric or strain engineering can be used to reduce exciton–exciton annihilation rates in monolayer transition metal dichalcogenides, but achieving electroluminescence in two-dimensional LEDs without efficiency roll-off is challenging. Here we describe pulsed LEDs that are based on intercalated transition metal dichalcogenides and offer suppressed exciton–exciton annihilation at high exciton generation rates. We intercalate oxygen plasma into few-layer molybdenum disulfide (MoS2) and tungsten disulfide (WS2) to create LEDs with a suppressed efficiency roll-off in both photo-excitation and electro-injection luminescence at all exciton densities up to around 1020 cm−2 s−1. We attribute this suppression to a reduced exciton Bohr radius and exciton diffusion coefficient, as extracted from optical spectroscopy measurements. LEDs based on intercalated MoS2 and WS2 operate at maximum external quantum efficiencies of 0.02% and 0.78%, respectively, at a generation rate of around 1020 cm−2 s−1.
期刊介绍:
Nature Electronics is a comprehensive journal that publishes both fundamental and applied research in the field of electronics. It encompasses a wide range of topics, including the study of new phenomena and devices, the design and construction of electronic circuits, and the practical applications of electronics. In addition, the journal explores the commercial and industrial aspects of electronics research.
The primary focus of Nature Electronics is on the development of technology and its potential impact on society. The journal incorporates the contributions of scientists, engineers, and industry professionals, offering a platform for their research findings. Moreover, Nature Electronics provides insightful commentary, thorough reviews, and analysis of the key issues that shape the field, as well as the technologies that are reshaping society.
Like all journals within the prestigious Nature brand, Nature Electronics upholds the highest standards of quality. It maintains a dedicated team of professional editors and follows a fair and rigorous peer-review process. The journal also ensures impeccable copy-editing and production, enabling swift publication. Additionally, Nature Electronics prides itself on its editorial independence, ensuring unbiased and impartial reporting.
In summary, Nature Electronics is a leading journal that publishes cutting-edge research in electronics. With its multidisciplinary approach and commitment to excellence, the journal serves as a valuable resource for scientists, engineers, and industry professionals seeking to stay at the forefront of advancements in the field.