title: Large-area perovskite nanowire arrays fabricated by large-scale roll-to-roll micro-gravure printing and doctor blading.
abstract: Organic-inorganic hybrid halide perovskite nanowires (PNWs) show great potential applications in electronic and optoelectronic devices such as solar cells, field-effect transistors and photodetectors. It is very meaningful to fabricate ordered, large-area PNW arrays and greatly accelerate their applications and commercialization in electronic and optoelectronic devices. Herein, highly oriented and ultra-long methylammonium lead iodide (CH3NH3PbI3) PNW array thin films were fabricated by large-scale roll-to-roll (R2R) micro-gravure printing and doctor blading in ambient environments (humility ∼45%, temperature ∼28 °C), which produced PNW lengths as long as 15 mm. Furthermore, photodetectors based on these PNWs were successfully fabricated on both silicon oxide (SiO2) and flexible polyethylene terephthalate (PET) substrates and showed moderate performance. This study provides low-cost, large-scale techniques to fabricate large-area PNW arrays with great potential applications in flexible electronic and optoelectronic devices.
authors.affiliation: Institute of Super-microstructure and Ultrafast Process in Advanced Materials, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, China. junliang.yang@csu.edu.cn.
authors.forename: Qiao
authors.initials: Q
authors.lastname: Hu
authors.affiliation: Institute of Super-microstructure and Ultrafast Process in Advanced Materials, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, China. junliang.yang@csu.edu.cn.
authors.forename: Han
authors.initials: H
authors.lastname: Wu
authors.affiliation: Institute of Super-microstructure and Ultrafast Process in Advanced Materials, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, China. junliang.yang@csu.edu.cn.
authors.forename: Jia
authors.initials: J
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
authors.forename: Donghang
authors.initials: D
authors.lastname: Yan
authors.affiliation: Institute of Super-microstructure and Ultrafast Process in Advanced Materials, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, China. junliang.yang@csu.edu.cn and Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA.
authors.forename: Yongli
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Institute of Super-microstructure and Ultrafast Process in Advanced Materials, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, China. junliang.yang@csu.edu.cn and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
authors.forename: Junliang
authors.initials: J
authors.lastname: Yang