Tailoring robust luminescent-based BaSrY4O8: Eu3+ platform opens new avenues for screening diverge surface prompted cheiloscopy, WLED's, and dosimetric applications

Abstract

The discovery, evaluation, and manipulation of material can open new avenues in different technological applications in a real-time practical implementation scenario is highly necessary. In this regard, the present work deals with the synthesis of a series amber-red color emitting BaSrY4O8:Eu3+(1–9 mol %) nanophosphors followed by a solution combustion route. X-ray diffraction studies of the prepared phosphors confirmed the orthorhombic phase with Pnma (62) space group. Scanning electron microscopy results revealed that the particles are dumbbells in shape with network-like structures. From diffuse reflectance spectroscopy data, the energy band gap was estimated and found to be ∼5.72–5.92 eV. The photoluminescence emission spectra of the prepared nanophosphors consist of intense and sharp peaks located at ∼ 578, 594, 612, 650, and 708 nm, which attributed to 5D0→7F0, 5D0→7F1,5D0→7F2,5D0→7F3 and 5D0→7F4 transitions of Eu3+ ions, respectively. The estimated Commission International de I'Eclairage color coordinates were found to be tuned from pink to amber-red region. Thermoluminescence glow curve of BaSrY4O8: Eu3+ (5 mol %) nanophosphor after irradiated with various γ –ray doses ranging from 1 to 8 KGy exhibits a broad band with maximum intensity at 340 °C. Thanks to intensive luminescence and nano-regime of the nanophosphor, which enable latent lip prints to visualize on various non-porous surfaces by revealing defined type I–V groove patterns without any background hindrance or color distraction under the excitation. The aforementioned results create new perspective avenues by demonstrating the versatility of the prepared nanophosphor as an excellent red component for white light-emitting diodes, dosimetry, and cheiloscopy applications.