title: Cross-stacked single-crystal organic nanowire p-n nanojunction arrays by nanotransfer printing.
abstract: We fabricated cross-stacked organic p-n nanojunction arrays made of single-crystal 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-PEN) and fullerene (C60) nanowires as p-type and n-type semiconductors, respectively, by using a nanotransfer printing technique. Single-crystal C60 nanowires were synthesized inside nanoscale channels of a mold and directly transferred onto a desired position of a flexible substrate by a lubricant liquid layer. In the consecutive printing process, single-crystal TIPS-PEN nanowires were grown in the same way and then perpendicularly aligned and placed onto the C60 nanowire arrays, resulting in a cross-stacked single-crystal organic p-n nanojunction array. The cross-stacked single-crystal TIPS-PEN/C60 nanowire p-n nanojunction devices show rectifying behavior with on/off ratio of ∼ 13 as well as photodiode characteristic with photogain of ∼ 2 under a light intensity of 12.2 mW/cm(2). Our study provides a facile, solution-processed approach to fabricate a large-area array of organic crystal nanojunction devices in a desired arrangement for future nanoscale electronics.
authors.affiliation: Department of Chemistry, Hanyang University , Seoul 133-791, Korea.
authors.forename: Kyung Sun
authors.initials: KS
authors.lastname: Park
authors.forename: Ki Seok
authors.initials: KS
authors.lastname: Lee
authors.forename: Chan-Mo
authors.initials: CM
authors.lastname: Kang
authors.forename: Jangmi
authors.initials: J
authors.lastname: Baek
authors.forename: Kyu Seok
authors.initials: KS
authors.lastname: Han
authors.forename: Changhee
authors.initials: C
authors.lastname: Lee
authors.forename: Yong-Eun
authors.initials: YE
authors.lastname: Koo Lee
authors.forename: Youngjong
authors.initials: Y
authors.lastname: Kang
authors.forename: Myung Mo
authors.initials: MM
authors.lastname: Sung
keywords: Single-crystal organic nanowire; direct printing; organic diode; p−n nanojunction