Highly-Efficient Thermoelectric-Pumped Light-Emitting-Diodes Based on Colloidal Quantum Dots

Highly-Efficient Thermoelectric-Pumped Light-Emitting-Diodes Based on Colloidal Quantum Dots | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Highly-Efficient Thermoelectric-Pumped Light-Emitting-Diodes Based on Colloidal Quantum Dots Xing Lin, Xingliang Dai, Zikang Ye, Yufei Shu, Xiaogang Peng This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-701744/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Pumped by sub-bandgap electric work and Peltier heat, thermoelectric-pumped light-emitting diodes (TEP-LEDs) can achieve a power-conversion-efficiency greater than 100%. However, cost-effective and high-efficiency TEP-LEDs are not readily accessible for the epitaxially grown III-V LEDs due to the high chip cost and efficiency droop at sub-bandgap voltages. Photoluminescence with power-conversion-efficiency above unity through phonon-assisted excitation has been realized in high-quality colloidal quantum dots (QDs), owing to their defect-free nature. Here, we show that solution-processed QD-LEDs (QLEDs) can achieve high power-conversion-efficiency and high brightness, circumventing the deficiency faced by conventional LEDs. The optimal red-emitting device exhibits internal power-conversion-efficiency of 93.5% at 100 cd m-2. At this brightness, the driving voltage (V) of 1.89 V is much lower than the photon voltage (Vp =hv/q = 1.96 V). Our results highlight that TEP-LEDs can be constructed by integrating large-scale solution processing techniques and chemical-grade materials, towards cost-effective display and lighting applications. Photonics/optics Optics/Lasers Nanoscience thermoelectric-pumped light-emitting diodes quantum dots power-conversion-efficiency Full Text Additional Declarations There is NO Competing Interest. Supplementary Files NPSI.docx Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-701744","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":39696664,"identity":"6ecf52bc-541c-4c6f-9146-c7f1f91701be","order_by":0,"name":"Xing Lin","email":"","orcid":"https://orcid.org/0000-0001-9460-8401","institution":"Zhejiang University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Xing","middleName":"","lastName":"Lin","suffix":""},{"id":39696665,"identity":"c89fa7ea-e876-464d-a8be-5f4f0352ce08","order_by":1,"name":"Xingliang Dai","email":"","orcid":"","institution":"Zhejiang University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Xingliang","middleName":"","lastName":"Dai","suffix":""},{"id":39696666,"identity":"e981d802-7d0b-4f2d-bf9a-4f9b486e233a","order_by":2,"name":"Zikang Ye","email":"","orcid":"","institution":"Zhejiang University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Zikang","middleName":"","lastName":"Ye","suffix":""},{"id":39696667,"identity":"ac2c536c-521d-4e03-9aa5-0daed0538b65","order_by":3,"name":"Yufei Shu","email":"","orcid":"","institution":"Zhejiang University","correspondingAuthor":false,"submittingAuthor":false,"prefix":"","firstName":"Yufei","middleName":"","lastName":"Shu","suffix":""},{"id":39696668,"identity":"562236ff-dbb0-43ea-ba2c-03b3fdf3f9cd","order_by":4,"name":"Xiaogang Peng","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAwElEQVRIiWNgGAWjYNCCCgZmECVBgpYzJGthbIPQxGkxuN187OHXeXXsBgeYD97mYbDLI6hFcs6xdGPZbWzMBgfYkq15GJKLCWrhl8gxk5bcxgPUwmMmzcNwILGBkBY2ifxv0pJzJIBa+L8RpwVoC5vkxwYDkC1sxGkB+sVMmuFYArPkYTZjyzkGyYS1AEPsmeSPmrpkvuPND2+8qbAjrAUUF8w8DAzJkMg0IKgeooXxBwODHTFqR8EoGAWjYIQCADB4MvFuS8NsAAAAAElFTkSuQmCC","orcid":"https://orcid.org/0000-0002-5606-8472","institution":"Zhejiang University","correspondingAuthor":true,"submittingAuthor":false,"prefix":"","firstName":"Xiaogang","middleName":"","lastName":"Peng","suffix":""}],"badges":[],"createdAt":"2021-07-09 17:10:43","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-701744/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-701744/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":13659464,"identity":"b93b377c-a593-4ce7-9ff2-2ed7aca52afd","added_by":"auto","created_at":"2021-09-17 10:19:54","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":602595,"visible":true,"origin":"","legend":"","description":"","filename":"NPmain2.0.pdf","url":"https://assets-eu.researchsquare.com/files/rs-701744/v1_covered.pdf"},{"id":11533750,"identity":"e42e1e61-ad43-4749-92d4-f916efa02453","added_by":"auto","created_at":"2021-07-16 15:13:42","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":599073,"visible":true,"origin":"","legend":"","description":"","filename":"NPmain2.0.pdf","url":"https://assets-eu.researchsquare.com/files/rs-701744/v1_covered.pdf"},{"id":11533749,"identity":"50f658ba-0186-4e6a-8c87-4307c197e127","added_by":"auto","created_at":"2021-07-16 15:13:36","extension":"docx","order_by":2,"title":"","display":"","copyAsset":false,"role":"supplement","size":1219953,"visible":true,"origin":"","legend":"","description":"","filename":"NPSI.docx","url":"https://assets-eu.researchsquare.com/files/rs-701744/v1/5e1e759894779d794d3f30b5.docx"}],"financialInterests":"There is \u003cb\u003eNO\u003c/b\u003e Competing Interest.","formattedTitle":"Highly-Efficient Thermoelectric-Pumped Light-Emitting-Diodes Based on Colloidal Quantum Dots","fulltext":[{"header":"Full Text","content":"This preprint is available for \u003ca href='/article/rs-701744/latest.pdf' target='_blank'\u003edownload as a PDF\u003c/a\u003e."}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"thermoelectric-pumped light-emitting diodes, quantum dots, power-conversion-efficiency","lastPublishedDoi":"10.21203/rs.3.rs-701744/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-701744/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Pumped by sub-bandgap electric work and Peltier heat, thermoelectric-pumped light-emitting diodes (TEP-LEDs) can achieve a power-conversion-efficiency greater than 100%. However, cost-effective and high-efficiency TEP-LEDs are not readily accessible for the epitaxially grown III-V LEDs due to the high chip cost and efficiency droop at sub-bandgap voltages. Photoluminescence with power-conversion-efficiency above unity through phonon-assisted excitation has been realized in high-quality colloidal quantum dots (QDs), owing to their defect-free nature. Here, we show that solution-processed QD-LEDs (QLEDs) can achieve high power-conversion-efficiency and high brightness, circumventing the deficiency faced by conventional LEDs. The optimal red-emitting device exhibits internal power-conversion-efficiency of 93.5% at 100 cd m-2. At this brightness, the driving voltage (V) of 1.89 V is much lower than the photon voltage (Vp =hv/q = 1.96 V). Our results highlight that TEP-LEDs can be constructed by integrating large-scale solution processing techniques and chemical-grade materials, towards cost-effective display and lighting applications.","manuscriptTitle":"Highly-Efficient Thermoelectric-Pumped Light-Emitting-Diodes Based on Colloidal Quantum Dots","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2021-07-16 15:13:34","doi":"10.21203/rs.3.rs-701744/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"37b73fbb-2e00-4b52-a19d-e29dfaf7198b","owner":[],"postedDate":"July 16th, 2021","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":5758735,"name":"Photonics/optics"},{"id":5758736,"name":"Optics/Lasers"},{"id":5758737,"name":"Nanoscience"}],"tags":[],"updatedAt":"2021-09-30T10:21:20+00:00","versionOfRecord":[],"versionCreatedAt":"2021-07-16 15:13:34","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-701744","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-701744","identity":"rs-701744","version":["v1"]},"buildId":"WrCJVZZCHTDjtuVLN7oU0","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}