Simultaneously controlling phase, morphology and up-conversion luminescence via lanthanide doping in Bi2O3: Yb3+/Tm3+ nanoparticles
Source abstract
Abstract
Abstract Bi2O3: Yb3+/Tm3+ nanoparticles with varied phase structures and morphologies were synthesized via the co-precipitation method assisted with a subsequent high-temperature calcination process. The influences of experimental parameters including dosage of urea, dopant concentration, reaction temperature and time on the crystal phase structures and morphologies of the as-prepared nanoparticles were investigated. Results revealed that the morphology, the crystal phase and the up-conversion emission of Bi2O3: Yb3+/Tm3+ could be simultaneously controlled by varying Yb3+ doping concentration. With increasing Yb3+ doping concentration (0-40%), the dramatic morphological evolution (nano-sheet to nano-flower to nano-sphere) and phase transition (monoclinic to tetragonal to cubic phase) were observed. Under the excitation of CW and pulse 980 nm lasers, Bi2O3: Yb3+/Tm3+ samples exhibited red (693 nm) and NIR (795 nm) double-band up-conversion emissions, where the increase of Yb3+ concentration leaded to the decreased emission intensity ratio of NIR to red (I795/I693) and the suppressed pulse-width-dependent up-conversion output.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Solid State Laser Technologies · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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