title: Rectification behavior of PATP self-assembled on ZnO microrod arrays.
abstract: A rectifying hybrid junction was fabricated by the self-assembly of 4-aminothiophenol (PATP) on well-aligned ZnO microrod arrays. Good rectification behavior was obtained from the device of Al/ZnO/PATP/Al. The electron transport at the ZnO/PATP interface was investigated systematically by experimental observation and theoretical simulation. X-ray photoelectron spectroscopy (XPS) analysis confirmed the strong binding between PATP and ZnO via S-Zn bonds. The effective energy barrier and ideality factor of the rectifying diode were estimated by the current-voltage (I-V) measurement and thermionic emission theory. The molecule dipole effect on work function was studied through energy band theory. Theoretical calculation results based on density functional theory (DFT) also indicated a significant dipole, caused by the anchoring effect of PATP, resulting in the changes of surface electronic characteristics of ZnO.
authors.affiliation: State Key Laboratory of Bioelectronics, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, People's Republic of China.
authors.forename: Shengjiang
authors.initials: S
authors.lastname: Fang
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Xu
authors.forename: Zhulin
authors.initials: Z
authors.lastname: Jin
authors.forename: Fengyu
authors.initials: F
authors.lastname: Sheng
authors.forename: Zengliang
authors.initials: Z
authors.lastname: Shi
authors.forename: Yueyue
authors.initials: Y
authors.lastname: Wang
authors.forename: Gangyi
authors.initials: G
authors.lastname: Zhu