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The synthesis and optical properties of GaSe/InSe core/shell nanoparticles

Paper ID Volume ID Publish Year Pages File Format Full-Text
27883 44048 2007 7 PDF Available
Title
The synthesis and optical properties of GaSe/InSe core/shell nanoparticles
Abstract

The synthesis of epitaxially grown GaSe/InSe core/shell nanoparticles is reported. InSe shells of 0.25 nm in thickness are grown on GaSe cores of 6 nm in diameter. The shell growth is accompanied by a red shift of the absorption spectrum and a decrease of the room temperature emission intensity. The absorption onset on red side just remains unchanged but that on blue side shifts from 27,840 to 25,266 cm−1, which means that an electron transition occurs between the GaSe core and the InSe shell. Time resolved emission experiments are also performed on the GaSe and the GaSe/InSe core/shell nanoparticles. Emission decay takes place on the 80 ps, 400 ps, and 2.4 ns time scales, while anisotropy decay follows two stages of 400 ps and 2.4 ns. Relaxation kinetics shows that the deep hole traps are effectively suppressed in the GaSe/InSe core/shell nanoparticles. The electron transition between the GaSe core and InSe shell results in a degree of charge separation that makes this core/shell nanoparticle attractive for use in photoelectric conversion devices.

Keywords
GaSe/InSe core/shell nanoparticle; Absorption transition; Anisotropy; Time resolved emission
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 192, Issues 2–3, 15 December 2007, Pages 159–165
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us