{"title":"室温下范德华集成单结发光二极管的量子效率超过 10","authors":"Zhenliang Hu, Qiang Fu, Junpeng Lu, Yong Zhang, Qi Zhang, Shixuan Wang, Zhexing Duan, Yuwei Zhang, Xiaoya Liu, Qiang Pan, Guangsheng Jiang, Tong Yang, Xu Han, Yutian Yang, Tianqi Liu, Tao Tao, Wenhui Wang, Bei Zhao, Xueyong Yuan, Dongyang Wan, Yanpeng Liu, Yumeng You, Peng Zhou, Hongwei Liu, Zhenhua Ni","doi":"10.1126/sciadv.adp8045","DOIUrl":null,"url":null,"abstract":"The construction of miniaturized light-emitting diodes (LEDs) with high external quantum efficiency (EQE) at room temperature remains a challenge for on-chip optoelectronics. Here, we demonstrate microsized LEDs fabricated by a dry-transfer van der Waals (vdW) integration method using typical layered Ruddlesden-Popper perovskites (RPPs). A single-crystalline layered RPP nanoflake is used as the active layer and sandwiched between two few-layer graphene contacts, forming van der Waals LEDs (vdWLEDs). Strong electroluminescence (EL) emission with a low turn-on current density of ~20 pA μm <jats:sup>−2</jats:sup> and high EQE exceeding 10% is observed at room temperature, which sets the benchmark for the EQE of vdWLEDs ever recorded. Such efficient EL emission is attributed to the inherent multiple quantum well structure and high photoluminescence quantum yield (~35%) of RPPs and a low charge injection barrier of ~0.10 eV facilitated by the Fowler-Nordheim tunneling mechanism. These findings promise a scalable pathway for accessing high-performance miniaturized light sources for on-chip optical optoelectronics.","PeriodicalId":21609,"journal":{"name":"Science Advances","volume":null,"pages":null},"PeriodicalIF":11.7000,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Van der Waals integrated single-junction light-emitting diodes exceeding 10% quantum efficiency at room temperature\",\"authors\":\"Zhenliang Hu, Qiang Fu, Junpeng Lu, Yong Zhang, Qi Zhang, Shixuan Wang, Zhexing Duan, Yuwei Zhang, Xiaoya Liu, Qiang Pan, Guangsheng Jiang, Tong Yang, Xu Han, Yutian Yang, Tianqi Liu, Tao Tao, Wenhui Wang, Bei Zhao, Xueyong Yuan, Dongyang Wan, Yanpeng Liu, Yumeng You, Peng Zhou, Hongwei Liu, Zhenhua Ni\",\"doi\":\"10.1126/sciadv.adp8045\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The construction of miniaturized light-emitting diodes (LEDs) with high external quantum efficiency (EQE) at room temperature remains a challenge for on-chip optoelectronics. Here, we demonstrate microsized LEDs fabricated by a dry-transfer van der Waals (vdW) integration method using typical layered Ruddlesden-Popper perovskites (RPPs). A single-crystalline layered RPP nanoflake is used as the active layer and sandwiched between two few-layer graphene contacts, forming van der Waals LEDs (vdWLEDs). Strong electroluminescence (EL) emission with a low turn-on current density of ~20 pA μm <jats:sup>−2</jats:sup> and high EQE exceeding 10% is observed at room temperature, which sets the benchmark for the EQE of vdWLEDs ever recorded. Such efficient EL emission is attributed to the inherent multiple quantum well structure and high photoluminescence quantum yield (~35%) of RPPs and a low charge injection barrier of ~0.10 eV facilitated by the Fowler-Nordheim tunneling mechanism. These findings promise a scalable pathway for accessing high-performance miniaturized light sources for on-chip optical optoelectronics.\",\"PeriodicalId\":21609,\"journal\":{\"name\":\"Science Advances\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":11.7000,\"publicationDate\":\"2024-10-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Science Advances\",\"FirstCategoryId\":\"103\",\"ListUrlMain\":\"https://doi.org/10.1126/sciadv.adp8045\",\"RegionNum\":1,\"RegionCategory\":\"综合性期刊\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MULTIDISCIPLINARY SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science Advances","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.1126/sciadv.adp8045","RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
引用次数: 0
摘要
在室温下制造具有高外部量子效率(EQE)的微型发光二极管(LED)仍然是片上光电子学面临的一项挑战。在这里,我们展示了利用典型的层状 Ruddlesden-Popper 过氧化物(RPPs),通过干转移范德华(vdW)集成方法制造的微型 LED。单晶层状 RPP 纳米薄片被用作活性层,夹在两个几层石墨烯触点之间,形成范德华发光二极管(vdWLED)。在室温下观察到的强电致发光(EL)发射具有约 20 pA μm -2 的低开启电流密度和超过 10% 的高 EQE,为迄今为止记录的 vdWLED 的 EQE 树立了基准。如此高效的 EL 发射归功于 RPPs 固有的多量子阱结构和高光致发光量子产率(约 35%),以及由 Fowler-Nordheim 隧道机制促成的约 0.10 eV 的低电荷注入势垒。这些发现为获得用于片上光学光电子学的高性能微型光源提供了一条可扩展的途径。
Van der Waals integrated single-junction light-emitting diodes exceeding 10% quantum efficiency at room temperature
The construction of miniaturized light-emitting diodes (LEDs) with high external quantum efficiency (EQE) at room temperature remains a challenge for on-chip optoelectronics. Here, we demonstrate microsized LEDs fabricated by a dry-transfer van der Waals (vdW) integration method using typical layered Ruddlesden-Popper perovskites (RPPs). A single-crystalline layered RPP nanoflake is used as the active layer and sandwiched between two few-layer graphene contacts, forming van der Waals LEDs (vdWLEDs). Strong electroluminescence (EL) emission with a low turn-on current density of ~20 pA μm −2 and high EQE exceeding 10% is observed at room temperature, which sets the benchmark for the EQE of vdWLEDs ever recorded. Such efficient EL emission is attributed to the inherent multiple quantum well structure and high photoluminescence quantum yield (~35%) of RPPs and a low charge injection barrier of ~0.10 eV facilitated by the Fowler-Nordheim tunneling mechanism. These findings promise a scalable pathway for accessing high-performance miniaturized light sources for on-chip optical optoelectronics.
期刊介绍:
Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.