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미립자공학,유동층,고분자,재료 : 무기, 유기 ; Phenylene-Thiophene-Thieno[3,4-b]pyrazine 올리고머의 합성과 특성
황미림 ( Mi Lim Hwang ),이길성 ( Ji Cheng Li ),서은옥 ( Eun Ok Seo ),이수형 ( Soo Hyoung Lee ),이연식 ( Youn Sik Lee ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.1
During the development of low band-gap organic materials(p-type semiconducting organic compounds) for organic solar cells, an oligomer consisting of2,5-dioctyloxyphenylene(OP), 3-hexylthiophene(HT), and 2,3-dimethylthieno[3,4-b]pyrazine{TP) as repeat units, oligo(OP-HT-TP), was synthesized. The oligomer was amorphous in nature in the temperature range studied, and well soluble in common organic solvents such as chloroform. The maximum absorption wavelength was 716 run in solid state. The band-gap and HOMOILUMO energy levels of oligo(OP-HT- TP) were measured to be 1.20 eV and -5.27/4.04 eV, respectively. However, the absorbance of the oligomer at maximum absorption wavelength was less than one fifth of that ofpoly(3-hexylthiophene) which has been most frequently used in fabrication of organic solar cells.