Tailoring the charge carrier dynamics in ZnO nanowires : the role of surface hole/electron traps

• Main Authors: Li, Mingjie, Xing, Guichuan, Qune, Lloyd Foong Nien Ah, Xing, Guozhong, Wu, Tom, Huan, Alfred Cheng Hon, Zhang, Xinhai, Sum, Tze Chien
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2012
• Subjects: DRNTU::Science::Chemistry::Physical chemistry
• Online Access: https://hdl.handle.net/10356/94201; http://hdl.handle.net/10220/7528
• Institution: Nanyang Technological University

Post-fabrication thermal-annealed ZnO nanowires (NWs) in an oxidizing (or a reducing) ambient were investigated using transient photoluminescence and X-ray photoelectron spectroscopy. Our findings reveal an ultrafast hole-transfer process to the surface adsorbed oxygen species (e.g. O2-, ) occurring...