DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Sung-Gak | - |
dc.contributor.advisor | 김성각 | - |
dc.contributor.author | Kim, Sang-Woo | - |
dc.contributor.author | 김상우 | - |
dc.date.accessioned | 2011-12-13T04:29:41Z | - |
dc.date.available | 2011-12-13T04:29:41Z | - |
dc.date.issued | 2003 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=181005&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/31606 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 화학과, 2003.2, [ iv, 104 p. ] | - |
dc.description.abstract | New EL polymers possessing both hole and electron transporting units in the main chain are synthesized. The polymer prepared by palladium catalyzed Heck reaction of 3,5-bis-(4-bromophenyl)-4-phenyl-[1,2,4]triazole and [4-(2-ethylhexyloxy)-phenyl]-bis-(4’-vinylphenyl)amine show a large weight average molecular weight (Mw) (25,000) and small polydispersity index (PDI) (1.2). The oligomers synthesized by Wittig condensation have $M_w$ of 4,000 and PDI of 1.8. All the polymer and oligomers synthesized exhibit remarkable thermal stability with high decomposition temperature and high $T_g$ as determined by TGA and DSC under nitrogen atmosphere. The EL emission maximum peaks of the materials prepared are in the range of 535nm~560nm corresponding to green~yellowish-green. Among the three hole-blocking/electron transporting moieties, the 1,3,4-oxadiazole unit shows the best electron injection and transporting property. We synthesized a series of bis [N-(p-X-phenyl) salicylaldiminato] zinc(II) and investigated their absorption, photoluminescence (PL) and electroluminescence (EL) properties. The p-substituted ligands Zn complex showed large bathochromic shift in introducing EWG on p-position which cause a lowering of the LUMO energy and blue-shift in EDG substituted complex, compared to unsubstituted ligand Zn complex. The p-substituted ligands Zn complexes result in decrease of electroluminescent efficiency and devices made with these materials have a higher operating voltage compared to device based on unsubstituted ligand Zn complex. | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | hole-transporting | - |
dc.subject | polymer | - |
dc.subject | light emitting diode (LED) | - |
dc.subject | electron-transporting | - |
dc.subject | 정공수송 물질 | - |
dc.subject | 전자수송 물질 | - |
dc.subject | 고분자 | - |
dc.subject | 전기발광소자 | - |
dc.title | Synthesis and properties of new electroluminescent materials | - |
dc.title.alternative | 새로운 전기발광 물질의 합성과 물성 측정에 관한 연구 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 181005/325007 | - |
dc.description.department | 한국과학기술원 : 화학과, | - |
dc.identifier.uid | 020005040 | - |
dc.contributor.localauthor | Kim, Sung-Gak | - |
dc.contributor.localauthor | 김성각 | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.