Efficient and Spectrally Stable Blue Perovskite Light-Emitting Diodes Employing a Cationic π-Conjugated Polymer.

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cam.issuedOnline2021-09-24
dc.contributor.authorYuan, Shuai
dc.contributor.authorCui, Lin-Song
dc.contributor.authorDai, Linjie
dc.contributor.authorLiu, Yun
dc.contributor.authorLiu, Qing-Wei
dc.contributor.authorSun, Yu-Qi
dc.contributor.authorAuras, Florian
dc.contributor.authorAnaya, Miguel
dc.contributor.authorZheng, Xiaopeng
dc.contributor.authorRuggeri, Edoardo
dc.contributor.authorYu, You-Jun
dc.contributor.authorQu, Yang-Kun
dc.contributor.authorAbdi-Jalebi, Mojtaba
dc.contributor.authorBakr, Osman M
dc.contributor.authorWang, Zhao-Kui
dc.contributor.authorStranks, Samuel D
dc.contributor.authorGreenham, Neil C
dc.contributor.authorLiao, Liang-Sheng
dc.contributor.authorFriend, Richard H
dc.contributor.orcidCui, Lin-Song [0000-0001-6577-3432]
dc.date.accessioned2021-11-24T00:30:14Z
dc.date.available2021-11-24T00:30:14Z
dc.date.issued2021-11
dc.description.abstractMetal halide perovskite semiconductors have demonstrated remarkable potentials in solution-processed blue light-emitting diodes (LEDs). However, the unsatisfied efficiency and spectral stability responsible for trap-mediated non-radiative losses and halide phase segregation remain the primary unsolved challenges for blue perovskite LEDs. In this study, it is reported that a fluorene-based π-conjugated cationic polymer can be blended with the perovskite semiconductor to control film formation and optoelectronic properties. As a result, sky-blue and true-blue perovskite LEDs with Commission Internationale de l'Eclairage coordinates of (0.08, 0.22) and (0.12, 0.13) at the record external quantum efficiencies of 11.2% and 8.0% were achieved. In addition, the mixed halide perovskites with the conjugated cationic polymer exhibit excellent spectral stability under external bias. This result illustrates that π-conjugated cationic polymers have a great potential to realize efficient blue mixed-halide perovskite LEDs with stable electroluminescence.
dc.description.sponsorshipEngineering and Physical Sciences Research Council (EPSRC) for funding (EP/M01083X/1, EP/M005143/1)
dc.identifier.doi10.17863/CAM.78447
dc.identifier.eissn1521-4095
dc.identifier.issn0935-9648
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/331002
dc.languageeng
dc.publisherWiley
dc.publisher.urlhttp://dx.doi.org/10.1002/adma.202103640
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectblue emissions
dc.subjecthigh efficiencies
dc.subjection migrations
dc.subjectperovskite light-emitting diodes
dc.subjectstabilities
dc.titleEfficient and Spectrally Stable Blue Perovskite Light-Emitting Diodes Employing a Cationic π-Conjugated Polymer.
dc.typeArticle
dcterms.dateAccepted2021-08-24
prism.endingPagee2103640
prism.issueIdentifier45
prism.publicationNameAdvanced Materials
prism.startingPagee2103640
prism.volume33
pubs.funder-project-idRoyal Society (UF150033)
pubs.funder-project-idEuropean Research Council (756962)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (841386)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M005143/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M01083X/1)
pubs.funder-project-idEuropean Research Council (670405)
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
rioxxterms.typeJournal Article/Review
rioxxterms.versionVoR
rioxxterms.versionofrecord10.1002/adma.202103640
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