| 초록 |
Small molecule pentacene has attracted much attention due to its ambient stabilities as an organic semiconductor. Following solid pentacene films, other small molecules were reported to improve the property of pentacene layer. Indolo[3,2-b]carbazole and DNTT (dinaphtho-[2,3-b:2',3'-f]thieno[3,2-b]thiophene) are the examples which were respectively reported recently. Even though the HOMO-LUMO gap of indolo[3,2-b]carbazole and DNTT are higher than that of pentacene, the photostability of such organic layers has hardly been considered yet. Here, we have emplemented 8,16-dihydrobenzo[a]benzo[6,7]indolo[2,3-h]carbazole (BBICZ) with HOMO-LUMO gap of ~2.95 eV, to fabricate a new small molecule-based OTFT. The field-effect mobility of the OTFT turns out to be ~0.17 cm2/V s which is lower than that of the pentacene OTFT on the same structure, however it certain displays good photostability. We also fabricated an image sensor pixel where our BBICZ-OTFT and pentacene diode are combined. |
