Jasira S V, Veena V P, Shilpa C K, Ancy S S, Baby Benjamin Hudson, Greeshma K, Nissamudeen K M, Sakthivel P
Department of Physics, Kannur University, Payyanur Campus, Edat, Kannur, Kerala 670327, India.
Department of Physics, National Institute of Technology, Warangal, Telangana 506004, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2025 Oct 5;338:126179. doi: 10.1016/j.saa.2025.126179. Epub 2025 Apr 8.
Praseodymium-incorporated barium cerate perovskites (BaCeO:1 wt% Pr) show promise for use in white LEDs. The present study focuses on the influence of bismuth as the sensitizer in the luminescence of BaCeO:1 wt% Pr. The novel perovskites were prepared using a low-temperature solution combustion method, with citric acid (fuel) and ammonium nitrate (extra oxidizer). In this study involving co-doping BaCeO:1 wt% Pr with bismuth, the influence of sensitizer concentration (0-2 wt%) on crystalline phases, band gap energy, and the luminescent properties of ceramic powders was explored through X-ray diffraction, UV-visible absorption spectra, and photoluminescence characterization methods. The experimental results revealed the orthorhombic single-phase formation of BaCeO:1 wt% Pr:xwt% Bi perovskites yielding high crystallinity and luminescence maximum at critical sensitizer concentration of 1 wt% Bi. Also, all the perovskites' bright white light emission was confirmed using the CIE color chromaticity diagram. Consequently, the nano-perovskite BaCeO:1 wt% Pr:1 wt% Bi emerges as an inevitable white-light-emitting phosphor with significant potential for energy-saving applications.
掺镨铈酸钡钙钛矿（BaCeO:1 wt% Pr）在白光发光二极管中具有应用前景。本研究聚焦于铋作为敏化剂对BaCeO:1 wt% Pr发光的影响。采用低温溶液燃烧法，以柠檬酸（燃料）和硝酸铵（额外氧化剂）制备了新型钙钛矿。在这项涉及BaCeO:1 wt% Pr与铋共掺杂的研究中，通过X射线衍射、紫外可见吸收光谱和光致发光表征方法，探究了敏化剂浓度（0 - 2 wt%）对陶瓷粉末晶相、带隙能量和发光性能的影响。实验结果表明，BaCeO:1 wt% Pr:xwt% Bi钙钛矿形成正交单相，在1 wt% Bi的临界敏化剂浓度下具有高结晶度和最大发光强度。此外，使用CIE色度图证实了所有钙钛矿均发出明亮的白光。因此，纳米钙钛矿BaCeO:1 wt% Pr:1 wt% Bi成为一种不可避免的白光发射荧光粉，在节能应用方面具有巨大潜力。
