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Power-dependent upconversion luminescence properties of self-sensitized Er2WO6 phosphor

Rajagopalan Krishnan, Samvit G Menon, Dirk Poelman (UGent) , Robin E Kroon and Hendrik C Swart
(2021) DALTON TRANSACTIONS. 50(1). p.229-239
Author
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Abstract
A Yb3+ free self-sensitized Er2WO6 phosphor has been synthesized via a solid-state reaction method. The phosphor material, Er2WO6, has a monoclinic crystal structure with space group P2/c (13). The deconvoluted high-resolution X-ray photoelectron spectra of all the core elements in the Er2WO6 phosphor material were explored. The highly resolved absorption peaks in the ultra-violet, visible and near-infra-red (NIR) regions of the diffuse reflectance spectrum were due to the Stark-splitting of the 4f energy levels of the Er3+ ions. Under 980 nm NIR laser excitation, the Er2WO6 phosphor showed an intense up-converted red emission at 677 nm due to the F-4(9/2) -> I-4(15/2) transitions of the Er3+ ions. The cross-relaxation and resonance energy transfer process involved in the key intermediate F-4(3/2) and F-4(5/2) levels of the Er3+ and their role in generating red emissions were investigated. The laser pump power versus upconversion intensity plot showed a slope with an n value <1 and the possible reasons behind this behavior were investigated. The photoluminescence properties of the Er2WO6 phosphor in the visible and NIR region were further analyzed. The potential application of the phosphor as a marker in latent fingerprint detection was also evaluated.
Keywords
LATENT-FINGERPRINTS, ER3+, EMISSION, CRYSTAL, NANOPARTICLES, SPECTROSCOPY, LANTHANIDE, MECHANISMS, IONS, WO3

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MLA
Krishnan, Rajagopalan, et al. “Power-Dependent Upconversion Luminescence Properties of Self-Sensitized Er2WO6 Phosphor.” DALTON TRANSACTIONS, vol. 50, no. 1, 2021, pp. 229–39, doi:10.1039/d0dt03081c.
APA
Krishnan, R., Menon, S. G., Poelman, D., Kroon, R. E., & Swart, H. C. (2021). Power-dependent upconversion luminescence properties of self-sensitized Er2WO6 phosphor. DALTON TRANSACTIONS, 50(1), 229–239. https://doi.org/10.1039/d0dt03081c
Chicago author-date
Krishnan, Rajagopalan, Samvit G Menon, Dirk Poelman, Robin E Kroon, and Hendrik C Swart. 2021. “Power-Dependent Upconversion Luminescence Properties of Self-Sensitized Er2WO6 Phosphor.” DALTON TRANSACTIONS 50 (1): 229–39. https://doi.org/10.1039/d0dt03081c.
Chicago author-date (all authors)
Krishnan, Rajagopalan, Samvit G Menon, Dirk Poelman, Robin E Kroon, and Hendrik C Swart. 2021. “Power-Dependent Upconversion Luminescence Properties of Self-Sensitized Er2WO6 Phosphor.” DALTON TRANSACTIONS 50 (1): 229–239. doi:10.1039/d0dt03081c.
Vancouver
1.
Krishnan R, Menon SG, Poelman D, Kroon RE, Swart HC. Power-dependent upconversion luminescence properties of self-sensitized Er2WO6 phosphor. DALTON TRANSACTIONS. 2021;50(1):229–39.
IEEE
[1]
R. Krishnan, S. G. Menon, D. Poelman, R. E. Kroon, and H. C. Swart, “Power-dependent upconversion luminescence properties of self-sensitized Er2WO6 phosphor,” DALTON TRANSACTIONS, vol. 50, no. 1, pp. 229–239, 2021.
@article{8686242,
  abstract     = {{A Yb3+ free self-sensitized Er2WO6 phosphor has been synthesized via a solid-state reaction method. The phosphor material, Er2WO6, has a monoclinic crystal structure with space group P2/c (13). The deconvoluted high-resolution X-ray photoelectron spectra of all the core elements in the Er2WO6 phosphor material were explored. The highly resolved absorption peaks in the ultra-violet, visible and near-infra-red (NIR) regions of the diffuse reflectance spectrum were due to the Stark-splitting of the 4f energy levels of the Er3+ ions. Under 980 nm NIR laser excitation, the Er2WO6 phosphor showed an intense up-converted red emission at 677 nm due to the F-4(9/2) -> I-4(15/2) transitions of the Er3+ ions. The cross-relaxation and resonance energy transfer process involved in the key intermediate F-4(3/2) and F-4(5/2) levels of the Er3+ and their role in generating red emissions were investigated. The laser pump power versus upconversion intensity plot showed a slope with an n value <1 and the possible reasons behind this behavior were investigated. The photoluminescence properties of the Er2WO6 phosphor in the visible and NIR region were further analyzed. The potential application of the phosphor as a marker in latent fingerprint detection was also evaluated.}},
  author       = {{Krishnan, Rajagopalan and Menon, Samvit G and Poelman, Dirk and Kroon, Robin E and Swart, Hendrik C}},
  issn         = {{1477-9226}},
  journal      = {{DALTON TRANSACTIONS}},
  keywords     = {{LATENT-FINGERPRINTS,ER3+,EMISSION,CRYSTAL,NANOPARTICLES,SPECTROSCOPY,LANTHANIDE,MECHANISMS,IONS,WO3}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{229--239}},
  title        = {{Power-dependent upconversion luminescence properties of self-sensitized Er2WO6 phosphor}},
  url          = {{http://doi.org/10.1039/d0dt03081c}},
  volume       = {{50}},
  year         = {{2021}},
}
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