Issue 26, 2011
From the journal:

Journal of Materials Chemistry

Highly efficient, tunable and bright photoluminescence from hydrophobic silica gel nanoparticles†

D. Haranath,*a   Sonal Sahai,ab   Sukhvir Singh,a   Amish G. Joshi,a   M. Husainb  and  V. Shankera  

* Corresponding authors

a National Physical Laboratory, Council of Scientific and Industrial Research (CSIR), Dr K. S. Krishnan Road, New Delhi, India
E-mail: haranath@nplindia.org
Fax: +91-11-4560 9310

b Department of Physics, Faculty of Natural Sciences Jamia Millia Islamia (JMI), New Delhi, India

Abstract

For the first time, we report a highly efficient, tunable and bright photoluminescence with external quantum yield up to ∼34% under 350 nm excitation from hydrophobic SiO2 gel nanoparticles. This is achieved by suitably modifying the relative surface states of the gel network with trivalent (Al3+/Ga3+) ions and emission from rare-earth (Eu3+) dopant. This attractive property arises from the intrinsic separation of absorption and the emission energies due to a large Stokes shift and offers opportunities for the design of novel nanophosphor based white light-emitting devices.

Graphical abstract: Highly efficient, tunable and bright photoluminescence from hydrophobic silica gel nanoparticles

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Article information

DOI
https://doi.org/10.1039/C1JM11874A
Article type
Communication
Submitted
28 Apr 2011
Accepted
09 May 2011
First published
23 May 2011

J. Mater. Chem., 2011,21, 9471-9474

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Highly efficient, tunable and bright photoluminescence from hydrophobic silica gel nanoparticles

D. Haranath, S. Sahai, S. Singh, A. G. Joshi, M. Husain and V. Shanker, J. Mater. Chem., 2011, 21, 9471 DOI: 10.1039/C1JM11874A

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