Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김대훈 | - |
dc.date.accessioned | 2019-11-19T05:40:07Z | - |
dc.date.available | 2019-11-19T05:40:07Z | - |
dc.date.issued | 2017-01 | - |
dc.identifier.citation | NANO ENERGY, v. 32, page. 441-447 | en_US |
dc.identifier.issn | 2211-2855 | - |
dc.identifier.issn | 2211-3282 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S2211285517300022?via%3Dihub | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/112311 | - |
dc.description.abstract | Graphene quantum dots (GQDs) have currently emerged as excellent candidates for applications in GQD-based LEDs because of their potential applications in next-generation multifunctional systems. However, the numerous oxygenous functional groups and defects existing in the GQDs restrict their florescence quantum yield, resulting in a decrease in the brightness of light-emitting devices (LEDs) based on GQDs. Here, we report on solution-processed and highly-efficient LEDs that have been developed based on octadecylamine (ODA)GQDs. In contrast with the GQDs, the number of oxygen components in the ODA-GQDs is lower due to nucleophilic substitution between the amine and the epoxy functional groups. The current and the external quantum efficiency of an LED with ODA-GQDs are 6.51 cd/A and 2.67%, respectively, this current efficiency of 6.51 cd/A being the highest among the efficiencies reported for LEDs based on GQDs. The efficiency enhancement in the LEDs with ODA-GQDs is attributed to significant improvements in the optical properties of the ODA-GQDs. The successful demonstration of this efficiency enhancement for LEDs based on ODA-GQDs indicates a potential for applications of GQD-based LEDs as next-generation real optical sources. | en_US |
dc.description.sponsorship | This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2016R1A2A1A05005502). | en_US |
dc.language.iso | en | en_US |
dc.publisher | ELSEVIER SCIENCE BV | en_US |
dc.subject | Quantum dot | en_US |
dc.subject | Graphene | en_US |
dc.subject | Light-emitting device | en_US |
dc.subject | Graphene quantum dot | en_US |
dc.subject | Current efficiency | en_US |
dc.title | Ultrahigh current efficiency of light-emitting devices based on octadecylamine-graphene quantum dots | en_US |
dc.type | Article | en_US |
dc.relation.no | 2 | - |
dc.relation.volume | 32 | - |
dc.identifier.doi | 10.1016/j.nanoen.2017.01.002 | - |
dc.relation.page | 441-447 | - |
dc.relation.journal | NANO ENERGY | - |
dc.contributor.googleauthor | Kim, Dae Hun | - |
dc.contributor.googleauthor | Kim, Tae Whan | - |
dc.relation.code | 2017006108 | - |
dc.sector.campus | S | - |
dc.sector.daehak | INDUSTRY-UNIVERSITY COOPERATION FOUNDATION[S] | - |
dc.sector.department | RESEARCH INSTITUTE | - |
dc.identifier.pid | kimdh8577 | - |
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