title: Volatilize-controlled oriented growth of the single-crystal layer for organic field-effect transistors.
abstract: We demonstrate a solution method of volatilize-controlled oriented growth (VOG) to fabricate aligned single crystals of 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) on a Si/SiO2 substrate. Through controlling the evaporation rate of the solvent, large-area-aligned single-crystal layers can be achieved on several substrates at the same time, covering over 90% on 2 × 1 cm substrates. The method provides a low-cost, maneuverable technology, which has potential to be used in batch production. We find that the atmosphere of the solvent with high dissolving capacity is in favor of aligned single-crystal growth. Besides, the growth mechanism of the VOG method is investigated in this paper. Top-contact organic field-effect transistors based on the single crystals of TIPS pentacene are achieved on a Si/SiO2 substrate. The optimal device exhibits a field-effect mobility of 0.42 cm(2) V(-1) s(-1) and an on/off current ratio of 10(5). Our research indicates that the VOG method is promising in single-crystal growth on a Si/SiO2 substrate for commercial production.
authors.affiliation: Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Haoyan
authors.initials: H
authors.lastname: Zhao
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.forename: Guifang
authors.initials: G
authors.lastname: Dong
authors.forename: Lian
authors.initials: L
authors.lastname: Duan
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Liu
authors.forename: Liduo
authors.initials: L
authors.lastname: Wang