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RISS 인기검색어
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- 저자 : Jhun Mo Son (검색결과 3 건)
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Sato, Hisaya,Son, Jhun Mo,Ogino, Kenji 한국공업화학회 1999 응용화학 Vol.3 No.1
Novel polymers having hole transport ability were prepared by condensation polymerization of triphenylamine derivatives (TPAs) and aldehydes such as paraformaldehyde (FA) or benzaldehyde (BzA). The polymers synthesized had high glass transition temperature in the range of 172-239℃ and were soluble in common organic solvents. The polymers had hole mobility in the range of 10^-5 to 10^-6 ㎠/Vs. The electroluminescent (EL) devices were fabricated using polymers prepared from N, N'-diphenyl -N, N'-bis(4-methylphenyl)-(1,1'-biphenyl)4,4'-diamine (TPD) as a hole transport layer and aluminum trisquinolinol as an electron transporting and emitting layer. It had turn on voltage of 4V and maximum luminance of 10⁴ cd/㎡, which correspond to the device using low molecular weight compound.
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이지훈,In-Seo Kee,강인남,Jhun-Mo Son,Kyu-Sik Kim,Moo-Jin Park,황도훈 한국물리학회 2009 Current Applied Physics Vol.9 No.4
A new solution-processable tetraalkoxy-substituted poly(1,4-phenylenevinylene) derivative, poly{[2- (3',7'-dimethyloctyloxy)-3,5,6-trimethoxy]-1,4-phenylenevinylene} (TALK-PPV), was synthesized through a dehydrohalogenation polymerization route, and its light-emitting properties were investigated. The TALK-PPV showed highly blue-shifted UV–visible absorption and PL emission spectra compared to the dialkoxy-substituted PPV derivatives. This is because of the disturbance to the p-conjugation caused by a steric hindered structure. The TALK-PPV thin film exhibited an absorption peak at 446 nm, with an onset at 515 nm. Its PL emission maximum was at 554 nm. Cyclic voltammetric analysis showed the HOMO and LUMO energy levels of the TALK-PPV to be 5.77 and 3.36 eV, respectively. Light-emitting devices were fabricated with an ITO (indium-tin oxide)/PEDOT/polymer/Ca/Al configuration. The TALK-PPV component leads to pure green light emission with a CIE 1931 chromaticity of (0.20, 0.74) at 100 cd/㎡ brightness, which is very close to the standard green (0.21, 0.71) demanded by the NTSC (National Television System Committee). The maximum brightness of this device was 24,900 cd/㎡ with an efficiency of 1.45 cd/A. A new solution-processable tetraalkoxy-substituted poly(1,4-phenylenevinylene) derivative, poly{[2- (3',7'-dimethyloctyloxy)-3,5,6-trimethoxy]-1,4-phenylenevinylene} (TALK-PPV), was synthesized through a dehydrohalogenation polymerization route, and its light-emitting properties were investigated. The TALK-PPV showed highly blue-shifted UV–visible absorption and PL emission spectra compared to the dialkoxy-substituted PPV derivatives. This is because of the disturbance to the p-conjugation caused by a steric hindered structure. The TALK-PPV thin film exhibited an absorption peak at 446 nm, with an onset at 515 nm. Its PL emission maximum was at 554 nm. Cyclic voltammetric analysis showed the HOMO and LUMO energy levels of the TALK-PPV to be 5.77 and 3.36 eV, respectively. Light-emitting devices were fabricated with an ITO (indium-tin oxide)/PEDOT/polymer/Ca/Al configuration. The TALK-PPV component leads to pure green light emission with a CIE 1931 chromaticity of (0.20, 0.74) at 100 cd/㎡ brightness, which is very close to the standard green (0.21, 0.71) demanded by the NTSC (National Television System Committee). The maximum brightness of this device was 24,900 cd/㎡ with an efficiency of 1.45 cd/A.
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