title: Dibenzothiopheno[6,5-b:6',5'-f]thieno[3,2-b]thiophene (DBTTT): high-performance small-molecule organic semiconductor for field-effect transistors.
abstract: We present the synthesis, characterization, and structural analysis of a thiophene-rich heteroacene, dibenzothiopheno[6,5-b:6',5'-f]thieno[3,2-b]thiophene (DBTTT) as well as its application in field-effect transistors. The design of DBTTT is based on the enhancement of intermolecular charge transfer through strong S-S interactions. Crystal structure analysis showed that the intermolecular π-π distance is shortened and that the packing density is higher than those of the electronically equivalent benzene analogue, dinaphtho-[2,3-b:2',3'-f]thieno[3,2-b]thiophene (DNTT). The highest hole mobility we obtained in polycrystalline DBTTT thin-film transistors was 19.3 cm(2)·V(-1)·s(-1), six times higher than that of DNTT-based transistors. The observed isotropic angular mobilities and thermal stabilities at temperatures up to 140 °C indicate the great potential of DBTTT for attaining device uniformity and processability.
authors.affiliation: Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd. , Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea.
authors.forename: Jeong-Il
authors.initials: JI
authors.lastname: Park
authors.affiliation: Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd. , Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea.
authors.forename: Jong Won
authors.initials: JW
authors.lastname: Chung
authors.affiliation: Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd. , Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea.
authors.forename: Joo-Young
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd. , Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea.|Department of Graphic Arts Information Engineering, College of Engineering, Pukyong National University , 365 Sinseron-ro, Nam-gu, Busan 608-739, Korea.
authors.forename: Jiyoul
authors.initials: J
authors.lastname: Lee
authors.affiliation: Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd. , Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea.
authors.forename: Ji Young
authors.initials: JY
authors.lastname: Jung
authors.affiliation: Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd. , Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea.
authors.forename: Bonwon
authors.initials: B
authors.lastname: Koo
authors.affiliation: Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd. , Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea.
authors.forename: Bang-Lin
authors.initials: BL
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Sungkyunkwan University Natural Science Campus , Seobu-ro 2066, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Korea.
authors.forename: Soon W
authors.initials: SW
authors.lastname: Lee
authors.affiliation: Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd. , Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea.
authors.forename: Yong Wan
authors.initials: YW
authors.lastname: Jin
authors.affiliation: Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd. , Samsung-ro 130, Yongtong-gu, Suwon-si, Gyeonggi-do 443-803, Korea.
authors.forename: Sang Yoon
authors.initials: SY
authors.lastname: Lee