Size-dependent photoluminescence from single indium phosphide nanowires

2019-12-20 03:43:11

Diameter nanowires PL dependent indium

责任者: Gudiksen, M.S.;Jianfang Wang;Lieber, C.M. 单位: Dept. of Chem. & Chem. Biol., Harvard Univ., Cambridge, MA, USA 来源出处: Journal of Physical Chemistry B(J. Phys. Chem. B (USA)),2002/04/25,106(16):4036-9 摘要: Photoluminescence (PL) imaging and spectroscopy have been used to investigate isolated, individual indium phosphide nanowires (InP NWs) at both room temperature and 7 K. PL images and spectra show that the en-fission maxima, line shapes, and intensities are nearly identical along the axis of a given NW. PL spectra collected on InP NWs with diameters of 10, 15, 20, and 50 nm show that emission maxima systematically shift to higher energy with decreasing wire diameter, for diameters less than 20 nm. An effective mass model (EMM) has been developed using particle-in-a-cylinder wave functions for electrons and holes to explore quantitatively the diameter-dependent PL data. The EMM provides excellent fits to the diameter-dependent data obtained at both room temperature and 7 K, and shows that the shifts in the emission spectra can be explained by radial quantum confinement 关键词: III-V semiconductors;indium compounds;nanostructured materials;photoluminescence;wave functions;size-dependent photoluminescence spectra;single indium phosphide nanowires;spectroscopy;indium phosphide nanowires;line shapes;emission maxima;wire diameter;particle-in-a-cylinder wave functions;effective mass model;diameter-dependent data;radial quantum confinement;line intensities;7 K;298 K;InP