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Highly Efficient Light-Emitting Diodes of Colloidal Metal-Halide Perovskite Nanocrystals beyond Quantum Size
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Young-Hoon | - |
dc.contributor.author | Wof, Christoph | - |
dc.contributor.author | Kim, Young-Tae | - |
dc.contributor.author | Cho, Himchan | - |
dc.contributor.author | Kwon, Woosung | - |
dc.contributor.author | Do, Sungan | - |
dc.contributor.author | Sadhanala, Aditya | - |
dc.contributor.author | Park, Chan Gyung | - |
dc.contributor.author | Rhee, Shi-Woo | - |
dc.contributor.author | Im, Sang Hyuk | - |
dc.contributor.author | Friend, Richard H. | - |
dc.contributor.author | Lee, Tae-Woo | - |
dc.date.accessioned | 2020-03-12T01:57:39Z | - |
dc.date.available | 2020-03-12T01:57:39Z | - |
dc.date.created | 2018-09-11 | - |
dc.date.created | 2018-09-11 | - |
dc.date.created | 2018-09-11 | - |
dc.date.issued | 2017-07 | - |
dc.identifier.citation | ACS Nano, Vol.11 No.7, pp.6586-6593 | - |
dc.identifier.issn | 1936-0851 | - |
dc.identifier.other | 52903 | - |
dc.identifier.uri | https://hdl.handle.net/10371/164462 | - |
dc.description.abstract | Colloidal metal-halide perovskite quantum dots (QDs) with a dimension less than the exciton Bohr diameter D-B (quantum size regime) emerged as promising light emitters due to their spectrally narrow light, facile color tuning, and high photoluminescence quantum efficiency (PLQE). However, their size-sensitive emission wavelength and color purity and low electroluminescence efficiency are still challenging aspects. Here, we demonstrate highly efficient light-emitting diodes (LEDs) based on the colloidal perovskite nano crystals (NCs) in a dimension > D-B (regime beyond quantum size) by using a multifunctional buffer hole injection layer (Buf-HIL). The perovskite NCs with a dimension greater than D-B show a size-irrespective high color purity and PLQE by managing the recombination of excitons occurring at surface traps and inside the NCs. The Buf-HIL composed of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) and per fluorinated ionomer induces uniform perovskite particle films with complete film coverage and prevents exciton quenching at the PEDOT:PSS/perovskite particle film interface. With these strategies, we achieved a very high PLQE (similar to 60.5%) in compact perovskite particle films without any complex post-treatments and multilayers and a high current efficiency of 15.5 cd/A in the LEDs of colloidal perovskite NCs, even in a simplified structure, which is the highest efficiency to date in green LEDs that use colloidal organic-inorganic metal-halide perovskite nanoparticles including perovskite QDs and NCs. These results can help to guide development of various light-emitting optoelectronic applications based on perovskite NCs. | - |
dc.language | 영어 | - |
dc.publisher | American Chemical Society | - |
dc.title | Highly Efficient Light-Emitting Diodes of Colloidal Metal-Halide Perovskite Nanocrystals beyond Quantum Size | - |
dc.type | Article | - |
dc.contributor.AlternativeAuthor | 이태우 | - |
dc.identifier.doi | 10.1021/acsnano.6b07617 | - |
dc.citation.journaltitle | ACS Nano | - |
dc.identifier.wosid | 000406649700006 | - |
dc.identifier.scopusid | 2-s2.0-85026308991 | - |
dc.citation.endpage | 6593 | - |
dc.citation.number | 7 | - |
dc.citation.startpage | 6586 | - |
dc.citation.volume | 11 | - |
dc.identifier.sci | 000406649700006 | - |
dc.description.isOpenAccess | Y | - |
dc.contributor.affiliatedAuthor | Lee, Tae-Woo | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | EXCITON BINDING-ENERGY | - |
dc.subject.keywordPlus | CRYSTALLIZATION | - |
dc.subject.keywordPlus | LUMINESCENCE | - |
dc.subject.keywordPlus | DEVICES | - |
dc.subject.keywordPlus | BRIGHT | - |
dc.subject.keywordAuthor | perovskite nanocrystal | - |
dc.subject.keywordAuthor | quantum size | - |
dc.subject.keywordAuthor | light-emitting diodes | - |
dc.subject.keywordAuthor | hole injection layer | - |
dc.subject.keywordAuthor | electroluminescence | - |
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