Photoacryl을 게이트 절연층으로 사용한 유기 박막트랜지스터의 전기적 특성에 관한 연구

Abstract

Organic thin film transitors(OTFT) are of interest for use in broad area electronic applications. And recently organic electroluminescent devices(OELD) have been intensively investigated for using in full-color flat-panel display. We have fabricated inverted-staggered structure OTFTs at lower temperature using the fused-ring polycyclic aromatic hydrocarbon pentacene as the active electronic material and photoacryl as the organic gate insulator. The field effect mobility is 0.039 ～ 0.17 cm2/Vs, on-off current ratio is 106, and threshold voltage is -7 V. And here we report the study of driving green emitting, Ir(ppy)3, phosphorescent OELD with all organic thin film transistor and investigated its electrical characteristics. The OELD with a structure of ITO/TPD/8% Ir(ppy)3 doped in BCP/BCP/Alq3/Li:Al/Al and OTFT with a structure of inverted-staggered Al(gate electrode)/photoacryl(gate insulator)/pentacene(p-type organic semiconductor)/ Au(source-drain electrode) were fabricated on the ITO patterend glass substrate. The electrical characteristics are turn-on voltage of -10 V, and maximum luminance of about 90 cd/m2. Device characteristics were quite different with that of only OELD.