authors |
Balabhadra, S; Debasu, ML; Brites, CDS; Ferreira, RAS; Carlos, LD |
nationality |
International |
journal |
JOURNAL OF LUMINESCENCE |
author keywords |
Emission quantum yield; Upconverting nanoparticles; Integrating sphere; SrF2:Yb3+/Er3+ colloidal suspension |
keywords |
UP-CONVERSION NANOCRYSTALS; LUMINESCENCE EFFICIENCY; POWER DEPENDENCE; LANTHANIDE; EXCITATION; GRAPHENE; PHOSPHOR; CELLS |
abstract |
Generally, emission quantum yield values of upconverting nanoparticles are not reported, despite its importance for characterizing the material's performance, because the measurements require quite expensive setups (a single photomultiplier operating in a broad spectral regions from the visible to the near-infrared) and laborious procedures (spectral mismatch correction when two photomultipliers are used). Here we describe the implementation of a simple and cost-effective quantum yield measurement setup using a commercial integrating sphere-based spectrometer operating in the visible spectral range and a power meter to determine the incident number of photons. First, we validate the experimental methodology using well-known down-shifting standard phosphors (sodium salicylate and perylene). Then, we use the developed setup in an illustrative example of upconverting nanoparticles, SrF2:Yb3-1-/ Er3+ (20/2%), to quantify their emission quantum yield values in powder (0.0057 +/- 0.0002 at 388 W cm(-2)) and water suspension (0.0028 +/- 0.0001 at 395 W cm(-2)). (C) 2017 Elsevier B.V. All rights reserved. |
publisher |
ELSEVIER SCIENCE BV |
issn |
0022-2313 |
year published |
2017 |
volume |
189 |
beginning page |
64 |
ending page |
70 |
digital object identifier (doi) |
10.1016/j.jlumin.2017.03.054 |
web of science category |
Optics |
subject category |
Optics |
unique article identifier |
WOS:000404197800006
|