title: Direct resonant coupling of Al surface plasmon for ultraviolet photoluminescence enhancement of ZnO microrods.
abstract: More than 170-fold ultraviolet emission enhancement was obtained from the hexagonal ZnO microrods synthesized by a simple vapor-phase transport process and decorated by Al nanoparticles (NPs). Based on the stable and transient photoluminescence (PL) spectra of the ZnO microrods sputtered with Al NPs for different times, the underlying mechanism was deduced and can be attributed to the metal surface plasmon resonance (SPR) coupling with ZnO. Interestingly, with increasing of the sputtering time, the ratio of the band gap emission to the defect-related emission was increased from 0.1 to 42.7. Our results demonstrated that ZnO microrods decorated with Al NPs shed light on developing stable and high-efficiency excitonic optoelectronic devices such as light-emitting diodes and lasers.
authors.affiliation: State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University , Nanjing 210096, China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Lu
authors.forename: Jitao
authors.initials: J
authors.lastname: Li
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Xu
authors.forename: Yu
authors.initials: Y
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Dai
authors.forename: Yueyue
authors.initials: Y
authors.lastname: Wang
authors.forename: Yi
authors.initials: Y
authors.lastname: Lin
authors.forename: Shufeng
authors.initials: S
authors.lastname: Wang
keywords: Al nanoparticles; ZnO microrods; photoluminescence; surface plasmon resonance; vapor-phase transport