{"title":"Heavy metal-free white light-emitting diodes based on multinary copper chalcogenide nanocrystals.","authors":"Peiwen Lv, Kai Wang, Danxin Hou, Shengli Wu, Jintao Guan, Zhe Yin, Aiwei Tang","doi":"10.1364/OL.555369","DOIUrl":null,"url":null,"abstract":"<p><p>Quantum dot (QD) white light-emitting diodes (WLEDs) have been aimed at improving high-color gamut displays and solid-state lighting yet faced scrutiny due to the toxicity of Cd. We have successfully fabricated WLEDs with a high color rendering index of 93 via heavy metal-free multinary copper chalcogenide nanocrystals. The devices demonstrate a maximum luminance of 1062 cd/m<sup>2</sup> and a peak external quantum efficiency (EQE) value of 1.15%. Notably, these devices exhibit minimal efficiency roll-off, maintaining an EQE value of 1.09% even at elevated luminance levels (500 cd/m<sup>2</sup>). This investigation presents a compelling methodology for fabricating WLEDs and holds significant promise for potential applications.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 7","pages":"2183-2186"},"PeriodicalIF":3.3000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.555369","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Quantum dot (QD) white light-emitting diodes (WLEDs) have been aimed at improving high-color gamut displays and solid-state lighting yet faced scrutiny due to the toxicity of Cd. We have successfully fabricated WLEDs with a high color rendering index of 93 via heavy metal-free multinary copper chalcogenide nanocrystals. The devices demonstrate a maximum luminance of 1062 cd/m2 and a peak external quantum efficiency (EQE) value of 1.15%. Notably, these devices exhibit minimal efficiency roll-off, maintaining an EQE value of 1.09% even at elevated luminance levels (500 cd/m2). This investigation presents a compelling methodology for fabricating WLEDs and holds significant promise for potential applications.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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