Upconversion luminescence of CdTe nanoparticles
(2005) In Physical Review B (Condensed Matter and Materials Physics) 71(16). p.1-165304- Abstract
- Efficient upconversion luminescence is observed from CdTe nanoparticles in solution and precipitated as solids. In the solids, the upconversion luminescence spectrum is significantly red shifted relative to the photoluminescence spectrum, whereas in solution, there is very little spectral shift. The upconversion luminescence exhibits a near-quadratic laser power dependence, both at room temperature and at 10 K. Both the upconversion and photoluminescence show similar decay dynamics with the solid samples showing shorter lifetimes compared to the solutions. This lifetime shortening is attributed to surface-state quenching. These results indicate that two-photon excitation is the likely upconversion excitation mechanism in these particles... (More)
- Efficient upconversion luminescence is observed from CdTe nanoparticles in solution and precipitated as solids. In the solids, the upconversion luminescence spectrum is significantly red shifted relative to the photoluminescence spectrum, whereas in solution, there is very little spectral shift. The upconversion luminescence exhibits a near-quadratic laser power dependence, both at room temperature and at 10 K. Both the upconversion and photoluminescence show similar decay dynamics with the solid samples showing shorter lifetimes compared to the solutions. This lifetime shortening is attributed to surface-state quenching. These results indicate that two-photon excitation is the likely upconversion excitation mechanism in these particles and that phonon-populated trap states do not contribute to the upconversion. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/152205
- author
- Joly, A G ; Chen, W ; McCready, D E ; Malm, Jan-Olle LU and Bovin, Jan-Olov LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 71
- issue
- 16
- pages
- 1 - 165304
- publisher
- American Physical Society
- external identifiers
-
- wos:000228763100056
- scopus:28744445696
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.71.165304
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)
- id
- a4305bf4-4459-43ff-aaac-bd5c141ec151 (old id 152205)
- date added to LUP
- 2016-04-01 15:41:12
- date last changed
- 2022-04-22 08:57:50
@article{a4305bf4-4459-43ff-aaac-bd5c141ec151,
abstract = {{Efficient upconversion luminescence is observed from CdTe nanoparticles in solution and precipitated as solids. In the solids, the upconversion luminescence spectrum is significantly red shifted relative to the photoluminescence spectrum, whereas in solution, there is very little spectral shift. The upconversion luminescence exhibits a near-quadratic laser power dependence, both at room temperature and at 10 K. Both the upconversion and photoluminescence show similar decay dynamics with the solid samples showing shorter lifetimes compared to the solutions. This lifetime shortening is attributed to surface-state quenching. These results indicate that two-photon excitation is the likely upconversion excitation mechanism in these particles and that phonon-populated trap states do not contribute to the upconversion.}},
author = {{Joly, A G and Chen, W and McCready, D E and Malm, Jan-Olle and Bovin, Jan-Olov}},
issn = {{1098-0121}},
language = {{eng}},
number = {{16}},
pages = {{1--165304}},
publisher = {{American Physical Society}},
series = {{Physical Review B (Condensed Matter and Materials Physics)}},
title = {{Upconversion luminescence of CdTe nanoparticles}},
url = {{http://dx.doi.org/10.1103/PhysRevB.71.165304}},
doi = {{10.1103/PhysRevB.71.165304}},
volume = {{71}},
year = {{2005}},
}