title: Shape-controlled tunable homochromatic luminescence and inner photoelectric effect of hexagonal Na1.23Ca0.12Y1.28Er0.24F6 phosphors.
abstract: Novel hexagonal Na1.23Ca0.12Y1.28Er0.24F6 nanodisks, microtubes, and nanorods were synthesized hydrothermally for the first time. Time-dependent morphology evolution showed that the resulting nanodisks, microtubes, and nanorods were synthesized by a dissolution-reconstruction formation mechanism. With the help of a 980 nm semiconductor laser, tunable homochromatic luminescence was observed by exciting single hexagonal Na1.23Ca0.12Y1.28Er0.24F6 nanodisks, microtubes, and nanorods, respectively. Simultaneously, the inner photoelectric effect was witnessed in the hexagonal Na1.23Ca0.12Y1.28Er0.24F6 nanodisks, microtubes, and nanorods under 980 nm excitation. We attributed anomalous inner photoelectric current to the presence of a laser stepped resonant excitation energy migration in the Na1.23Ca0.12Y1.28Er0.24F6 matrix when a laser was applied to it. Simultaneous control of homochromatic luminescence and inner photoelectric effect were achieved by modifying morphological shapes of single Na1.23Ca0.12Y1.28Er0.24F6 phosphors.
authors.affiliation: College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, People's Republic of China. wxf@nuaa.edu.cn.
authors.forename: Xiangfu
authors.initials: X
authors.lastname: Wang
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Yan
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Bu
authors.forename: Caixia
authors.initials: C
authors.lastname: Kan
authors.forename: Yuan
authors.initials: Y
authors.lastname: Chen