Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 한태희 | - |
dc.date.accessioned | 2021-03-26T02:06:00Z | - |
dc.date.available | 2021-03-26T02:06:00Z | - |
dc.date.issued | 2020-01 | - |
dc.identifier.citation | ADVANCED MATERIALS, v. 32, no. 1, article no. 1905674 | en_US |
dc.identifier.issn | 0935-9648 | - |
dc.identifier.issn | 1521-4095 | - |
dc.identifier.uri | https://onlinelibrary.wiley.com/doi/full/10.1002/adma.201905674 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/160883 | - |
dc.description.abstract | Although metal halide perovskite (MHP) light-emitting diodes (LEDs) have demonstrated great potential in terms of electroluminescence efficiency, the operational stability of MHP LEDs currently remains the biggest bottleneck toward their practical usage. Well-confined excitons/charge carriers in a dielectric/quantum well based on conventional spatial or potential confinement approaches substantially enhance radiative recombination in MHPs, but an increased surface-to-volume ratio and multiphase interfaces likely result in a high degree of surface or interface defect states, which brings about a critical environmentally/operationally vulnerable point on LED stability. Here, an effective solution is suggested to mitigate such drawbacks using strategically designed surface-2D/bulk-3D heterophased MHP nanograins for long-term-stable LEDs. The 2D surface-functionalized MHP renders significantly reduced trap density, environmental stability, and an ion-migration-immune surface in addition to a fast radiative recombination owing to its spatially and potentially confined charge carriers, simultaneously. As a result, heterophased MHP LEDs show substantial improvement in operational lifetime (T50: ˃200 h) compared to conventional pure 3D or quasi-2D counterparts (T50: ˂ 0.2 h) as well as electroluminescence efficiency (surface-2D/bulk-3D: ≈7.70 ph per el% and pure 3D: ≈0.46 ph per el%). | en_US |
dc.description.sponsorship | This work was supported by the Air Force Office of Scientific Research (Grant No. FA9550-15-1-0610), the Office of Naval Research (Grant No. N00014-04-1-0434), and the National Science Foundation (Grant Nos. DMR-1210893 and ECCS-EPMD-1509955). This work was supported by the research fund of Hanyang University (HY-2019). | en_US |
dc.language.iso | en | en_US |
dc.publisher | WILEY-V C H VERLAG GMBH | en_US |
dc.subject | light-emitting diodes | en_US |
dc.subject | operational stability | en_US |
dc.subject | perovskites | en_US |
dc.title | Surface‐2D/Bulk‐3D Heterophased Perovskite Nanograins for Long‐Term‐Stable Light‐Emitting Diodes | en_US |
dc.type | Article | en_US |
dc.relation.no | 1 | - |
dc.relation.volume | 32 | - |
dc.identifier.doi | 10.1002/adma.201905674 | - |
dc.relation.page | 1-10 | - |
dc.relation.journal | ADVANCED MATERIALS | - |
dc.contributor.googleauthor | Han, Tae-Hee | - |
dc.contributor.googleauthor | Lee, Jin-Wook | - |
dc.contributor.googleauthor | Choi, Yung Ji | - |
dc.contributor.googleauthor | Choi, Chungseok | - |
dc.contributor.googleauthor | Tan, Shaun | - |
dc.contributor.googleauthor | Lee, Sung-Joon | - |
dc.contributor.googleauthor | Zhao, Yepin | - |
dc.contributor.googleauthor | Huang, Yu | - |
dc.contributor.googleauthor | Kim, Dongho | - |
dc.contributor.googleauthor | Yang, Yang | - |
dc.relation.code | 2020052498 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DIVISION OF MATERIALS SCIENCE AND ENGINEERING | - |
dc.identifier.pid | taeheehan | - |
dc.identifier.researcherID | E-8590-2015 | - |
dc.identifier.orcid | http://orcid.org/0000-0001-5950-7103 | - |
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