Bright White Light Emission by Nanopowders and Thin Films of PrO2:Zr-Based Materials Excited at the Near-Infrared

被引：0

作者：

Oliveira, Antonio L. ^{[1
]}

Silva Filho, Cicero I. ^{[2
]}

Ramos, Maria K. ^{[3
]}

da Luz, Leonis L. ^{[1
,4
]}

de Araujo, Marcus C. ^{[5
]}

de Azevedo, Walter M. ^{[1
]}

Zarbin, Aldo J. G. ^{[3
]}

Longo, Ricardo L. ^{[1
]}

Alves Junior, Severino ^{[1
]}

机构：

[1] Univ Fed Pernambuco, Dept Qui?m Fundamental, Cidade Univ, BR-50740560 Recife, PE, Brazil

[2] Ctr Tecnol Estrateg Nordeste, Ave Prof Luiz Freire,01-Cidade Univ, BR-50740545 Recife, PE, Brazil

[3] Univ Fed Parana UFPR, Dept Quim, CP 19032, BR-81531980 Curitiba, PR, Brazil

[4] Univ Fed Pernambuco, Ctr Academ Agreste, BR-55002970 Caruaru, PE, Brazil

[5] Univ Fed Pernambuco, Dept Engn Mecan, Cidade Univ, BR-50740550 Recife, PE, Brazil

来源：

ACS APPLIED OPTICAL MATERIALS | 2025年

关键词：

white light; blackbody emission; pressure sensing; lanthanide oxide; upconversion; thin films; CERIA-BASED MATERIALS; PRASEODYMIUM OXIDE; ELECTRONIC-STRUCTURE; LIQUID INTERFACES; UP-CONVERSION; FUEL-CELLS; PR; PR6O11; CEO2; NANOPARTICLES;

D O I：

10.1021/acsaom.4c00418

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Doped nanoparticles of Pr1-x Zr x O2 (x = 0.05, 0.10 (PZ10), 0.20, and 0.3) were successfully synthesized via the Pechini method. These particles retained the cubic structure of PrO2, with lattice parameters and energy bandgaps varying linearly with the amount of Zr4+ (x in Pr1-x Zr x O2). The absorbance at 980 nm decreased linearly with the nanoparticle diameter, attributed to ligand-to-metal charge transfer (LMCT) states related to the concentration of [Pr4+-O2-] pairs near the surface. These nanopowders exhibited bright white light emissions under near-infrared (NIR) excitation (980 nm) at power densities from 80 to 200 W cm-2. The emission spectra showed a continuous broadband, typical of a blackbody-type exitance. The integrated emission intensity and fitted temperature notably demonstrated linear correlations with the absorbance and excitation power density, respectively. Using a thermal camera, we determined the exitance coefficients of these nanopowders. For practical applications, thin films of PZ10 and PrO2 deposited on transparent substrates maintained bright white emissions under both atmospheric and vacuum conditions, which were employed as possible pressure-sensing devices. These findings are significant for designing efficient materials, offering the potential for testing and validating quantitative models that explain this phenomenon and for improving solar cells and photocatalytic systems.

引用

页码：607 / 619

页数：13

共 69 条

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