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dc.contributor.authorHoang, Minh Tam
dc.contributor.authorPannu, Amandeep Singh
dc.contributor.authorTang, Cheng
dc.contributor.authorYang, Yang
dc.contributor.authorPham, Ngoc Duy
dc.contributor.authorGui, Ke
dc.contributor.authorWang, Xiaoxiang
dc.contributor.authorYambem, Soniya
dc.contributor.authorSonar, Prashant
dc.contributor.authorDu, Aijun
dc.contributor.authorWang, Hongxia
dc.date.accessioned2020-10-21T00:39:50Z
dc.date.available2020-10-21T00:39:50Z
dc.date.issued2020
dc.identifier.issn2195-1071
dc.identifier.doi10.1002/adom.202000742
dc.identifier.urihttp://hdl.handle.net/10072/398542
dc.description.abstractMetal halide perovskite nanocrystals (PeNCs) are emerging as one of the most promising materials for optoelectrical devices such as light‐emitting diode (LED) owing to their tunable band gaps, high color purity, and tolerance to defects. Nevertheless, the materials have not yet demonstrated their full potential in practical applications due to the poor stability of PeNCs and their unsatisfactory performance in devices. In this research, LED devices based on CsPbBr3 NCs are successfully demonstrated as an active light‐emitting layer with enhanced efficiency via potassium doping. The study of the effect of potassium dopant on physicochemical properties of inorganic CsPbBr3 PeNCs shows that potassium cations (K+) remain in the crystal structure of perovskite compound as interstitial defects, which results in better coverage of surface ligands on the PeNCs and improved energy band alignment with adjacent electron injection layer (2,2′,2′‐(1,3,5‐benzinetriyl)‐tris(1‐phenyl‐1‐H‐benzimidazole)) and hole injection layer (poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate) in an LED. As a consequence, the green LED with the K‐doped CsPbBr3 PeNCs shows luminance up to 5759 cd m‐2 and external quantum efficiency (EQE) of 5.6%, which is superior to the pristine device without K‐doping (luminance: 4579 cd m‐2, EQE: 4.8%).
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherWiley
dc.relation.ispartofpagefrom2000742
dc.relation.ispartofissue18
dc.relation.ispartofjournalAdvanced Optical Materials
dc.relation.ispartofvolume8
dc.subject.fieldofresearchAtomic, molecular and optical physics
dc.subject.fieldofresearchMaterials engineering
dc.subject.fieldofresearchcode5102
dc.subject.fieldofresearchcode4016
dc.subject.keywordsScience & Technology
dc.subject.keywordsPhysical Sciences
dc.subject.keywordsMaterials Science, Multidisciplinary
dc.subject.keywordsOptics
dc.titlePotassium Doping to Enhance Green Photoemission of Light‐Emitting Diodes Based on CsPbBr3 Perovskite Nanocrystals
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationHoang, MT; Pannu, AS; Tang, C; Yang, Y; Pham, ND; Gui, K; Wang, X; Yambem, S; Sonar, P; Du, A; Wang, H, Potassium Doping to Enhance Green Photoemission of Light‐Emitting Diodes Based on CsPbBr3 Perovskite Nanocrystals, Advanced Optical Materials, 2020, 8 (18), pp. 2000742
dc.date.updated2020-10-21T00:38:41Z
gro.hasfulltextNo Full Text
gro.griffith.authorPannu, Amandeep Singh S.


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