Experimental observation of spatially resolved photo-luminescence intensity distribution in dual mode upconverting nanorod bundles.

ABSTRACT: A novel method for demonstration of photoluminescence intensity distribution in upconverting nanorod bundles using confocal microscopy is reported. Herein, a strategy for the synthesis of highly luminescent dual mode upconverting/downshift Y_1.94O₃:Ho³⁺_0.02/Yb³⁺_0.04 nanorod bundles by a facile hydrothermal route has been introduced. These luminescent nanorod bundles exhibit strong green emission at 549?nm upon excitations at 449?nm and 980?nm with quantum efficiencies of ~6.3% and ~1.1%, respectively. The TEM/HRTEM results confirm that these bundles are composed of several individual nanorods with diameter of ~100?nm and length in the range of 1-3??m. Furthermore, two dimensional spatially resolved photoluminescence intensity distribution study has been carried out using confocal photoluminescence microscope throughout the nanorod bundles. This study provides a new direction for the potential use of such emerging dual mode nanorod bundles as photon sources for next generation flat panel optical display devices, bio-medical applications, luminescent security ink and enhanced energy harvesting in photovoltaic applications.

SUBMITTER: Kumar P 

PROVIDER: S-EPMC5304174 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature