DC Field | Value | Language |
---|---|---|
dc.contributor.author | Park, Ji-Sun | ko |
dc.contributor.author | Lee, Ju-Min | ko |
dc.contributor.author | Hwang, Sun-Kak | ko |
dc.contributor.author | Lee, Sun-Hwa | ko |
dc.contributor.author | Lee, Hyun-Jung | ko |
dc.contributor.author | Lee, Bo-Ram | ko |
dc.contributor.author | Park, Hyung-Il | ko |
dc.contributor.author | Kim, Ji-Seon | ko |
dc.contributor.author | Yoo, Seung-Hyup | ko |
dc.contributor.author | Song, Myoung-Hoon | ko |
dc.contributor.author | Kim, Sang-Ouk | ko |
dc.date.accessioned | 2013-03-12T22:36:13Z | - |
dc.date.available | 2013-03-12T22:36:13Z | - |
dc.date.created | 2012-08-08 | - |
dc.date.created | 2012-08-08 | - |
dc.date.issued | 2012-05 | - |
dc.identifier.citation | JOURNAL OF MATERIALS CHEMISTRY, v.22, no.25, pp.12695 - 12700 | - |
dc.identifier.issn | 0959-9428 | - |
dc.identifier.uri | http://hdl.handle.net/10203/103750 | - |
dc.description.abstract | Metal oxide charge transport layers are widely used to promote the interfacial charge transport of organic optoelectronics. Nevertheless, frequently used wide-bandgap metal oxides with low electrical conductivities reveal inherent limitations in the charge transport enhancement. We present the remarkable electro-conductivity enhancement of solution processable ZnO charge transport layers upon dispersing a tiny amount (less than 0.1 wt%) of chemically doped CNTs and the corresponding device performance improvement of light-emitting diodes (OLEDs). Using various undoped or doped CNTs, whose work function was systematically tuned by substitutional doping of electron deficient B or electron rich N,N-doped CNT (N-CNT), the composite showed a lowered work function matching well with the conduction band of ZnO. Consequently, the ZnO/N-CNT nanocomposite transport layer with 0.08 wt% N-CNT showed a five-fold enhancement of electron mobility, while maintaining the intrinsic bandgap energy levels, optical transparency and solution processability of pure ZnO. The inverted OLEDs employing ZnO/N-CNT nanocomposite electron transport layers could facilitate well-balanced electron-hole injection and, thus, more than two-fold enhancement of maximum luminance (from 21 000 cd m(-2) at 14.6 V to 46 100 cd m(-2) at 14.0 V) and efficiency (from 6.9 cd A(-1) at 13.4 V to 14.3 cd A(-1) at 13.6 V). This highly effective charge mobility enhancement enabled by work function tunable, chemically doped CNTs would be beneficial for various organic and inorganic charge transport materials with different energy levels. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | LIGHT-EMITTING-DIODES | - |
dc.subject | ELECTRON INJECTION | - |
dc.subject | SOLAR-CELLS | - |
dc.subject | METAL-OXIDE | - |
dc.subject | DEVICES | - |
dc.subject | GRAPHENE | - |
dc.title | A ZnO/N-doped carbon nanotube nanocomposite charge transport layer for high performance optoelectronics | - |
dc.type | Article | - |
dc.identifier.wosid | 000304884000040 | - |
dc.identifier.scopusid | 2-s2.0-84862181903 | - |
dc.type.rims | ART | - |
dc.citation.volume | 22 | - |
dc.citation.issue | 25 | - |
dc.citation.beginningpage | 12695 | - |
dc.citation.endingpage | 12700 | - |
dc.citation.publicationname | JOURNAL OF MATERIALS CHEMISTRY | - |
dc.identifier.doi | 10.1039/c2jm30710c | - |
dc.contributor.localauthor | Yoo, Seung-Hyup | - |
dc.contributor.localauthor | Kim, Sang-Ouk | - |
dc.contributor.nonIdAuthor | Lee, Hyun-Jung | - |
dc.contributor.nonIdAuthor | Lee, Bo-Ram | - |
dc.contributor.nonIdAuthor | Kim, Ji-Seon | - |
dc.contributor.nonIdAuthor | Song, Myoung-Hoon | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | LIGHT-EMITTING-DIODES | - |
dc.subject.keywordPlus | ELECTRON INJECTION | - |
dc.subject.keywordPlus | SOLAR-CELLS | - |
dc.subject.keywordPlus | METAL-OXIDE | - |
dc.subject.keywordPlus | DEVICES | - |
dc.subject.keywordPlus | GRAPHENE | - |
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