+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Low threshold amplified spontaneous emission from tin oxide quantum dots: a instantiation of dipole transition silence semiconductors

Low threshold amplified spontaneous emission from tin oxide quantum dots: a instantiation of dipole transition silence semiconductors

Nanoscale 5(23): 11561

Direct bandgap semiconductors, such as In2O3, Cu2O, and SnO2, have enormous applications in photochemistry, photovoltaics, and optoelectronics. Due to the same parity of conduction and valence bands, the dipole transition is silent in these direct bandgap semiconductors. The low band-to-band transition efficiency prevents them from high intensity light emission or absorption. Here, we report the fabrication of SnO2 quantum dots (QDs) with sizes less than the exciton Bohr radius by a facile "top-down" strategy based on laser fragmentation of SnO in water. The SnO2 QDs shows exciton emission at ∼300 nm with a high quantum yield of ~17%. Amplified spontaneous exciton emission is also achieved from a thin layer of SnO2 QDs dispersed in PEG400 on a quartz substrate. Therefore, we have shown that SnO2 QDs can be a potential luminescent material suitable for the realization of ultraviolet B lasing devices.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 054187063

Download citation: RISBibTeXText

PMID: 24077429

DOI: 10.1039/c3nr03523a

Related references

Time-Resolved Amplified Spontaneous Emission in InAs/GaAs Quantum Dots. Physica Status Solidi 224(2): 475-480, 2001

Modified spontaneous emission and qubit entanglement from dipole-coupled quantum dots in a photonic crystal nanocavity. Physical Review Letters 94(22): 227402, 2005

Tunable amplified spontaneous emission in graphene quantum dots doped cholesteric liquid crystals. Nanotechnology 28(24): 245202, 2017

Nearly temperature-independent threshold for amplified spontaneous emission in colloidal CdSe/CdS quantum dot-in-rods. Advanced Materials 24(35): Op231-5, 2012

Air-Stable Surface-Passivated Perovskite Quantum Dots for Ultra-Robust, Single- and Two-Photon-Induced Amplified Spontaneous Emission. Journal of Physical Chemistry Letters 6(24): 5027-5033, 2015

Theoretical evidence of low-threshold amplified spontaneous emission in organic emitters: transition density and intramolecular vibrational mode analysis. Physical Chemistry Chemical Physics 20(29): 19515-19524, 2018

Transitions from spontaneous emission to stimulated emission and superfluorescence of biexcitons confined in CuCl quantum dots. Journal of Luminescence 133: 77-80, 2013

Highly Transparent, Visible-Light Photodetector Based on Oxide Semiconductors and Quantum Dots. Acs Applied Materials and Interfaces 7(35): 19666-19671, 2015

Control of Nanostructures and Interfaces of Metal Oxide Semiconductors for Quantum-Dots-Sensitized Solar Cells. Journal of Physical Chemistry Letters 6(10): 1859-1869, 2015

Low Threshold Two-Photon-Pumped Amplified Spontaneous Emission in CH3NH3PbBr3 Microdisks. Acs Applied Materials and Interfaces 8(30): 19587-19592, 2016

Amplified electrochemiluminescence of quantum dots by electrochemically reduced graphene oxide for nanobiosensing of acetylcholine. Biosensors and Bioelectronics 26(11): 4552-4558, 2011

Transition from superfluorescence to amplified spontaneous emission. Physical Review Letters 59(11): 1189-1192, 1987

Excitation Wavelength Independence: Toward Low-Threshold Amplified Spontaneous Emission from Carbon Nanodots. Acs Applied Materials and Interfaces 8(38): 25454-25460, 2016

Rainbow Emission from an Atomic Transition in Doped Quantum Dots. Journal of Physical Chemistry Letters 5(13): 2208-2213, 2014

Microcavity modified spontaneous emission of single quantum dots. Physica Status Solidi 244(8): 2792-2802, 2007