Abstract
The SrxBa1−xTiO3: Eu3+, Gd3+ phosphors are synthesized by high temperature solid‐phase method. Multiple techniques including X‐ray diffraction (XRD), and scanning electron microscopy (SEM) are used to examine the surface morphology and structural properties of SrxBa1−xTiO3: Eu3+, Gd3+ phosphors. The optical properties are presented and discussed in terms of photoluminescence (PL) and photoluminescence excitation (PLE) spectra. The as‐obtained SrxBa1−xTiO3: Eu3+, Gd3+ phosphors show higher PL emission intensity (at 591, 611 nm). The peaks at 591 and 611 nm are attributed to Eu3+ 5D0‐7F1, 5D0‐7F2. Gd3+ has a strong sensitization on Eu3+. A certain amount of Sr2+ and Ba2+ is contributed to the intensity of light emission. After being irradiated with blue light, the phosphor samples emit yellow light. This suggests its potential applications in many fields.
Highlights
White light-emitting diode (WLED) has been developed rapidly over the past decade, since its advanced properties such as long life time, high efficiency, and being environmentally friendly without use of mercury [1, 2]
The structures of the phosphor were established by X-ray diffractometer (XRD) (Shimadzu, XRD6000, Cu Ka target) and the morphology of the particles was observed by field emission scanning electron microscope (FE-scanning electron microscopy (SEM)) (Sirion 200, Philip)
A series of SrxBa1−xTiO3: Eu3+, Gd3+ phosphors were synthesized via the conventional high temperature solid state reaction method
Summary
White light-emitting diode (WLED) has been developed rapidly over the past decade, since its advanced properties such as long life time, high efficiency, and being environmentally friendly without use of mercury [1, 2]. White LEDs are composed of a blue LED chip GaN and yellow phosphor such as Y3Al5O12: Ce3+. This system has a low color rendering index because of its deficiency in the red region of the visible spectrum [5, 6]. Titanate system has excellent properties such as very good physical and chemical stability, its stability in epoxy resin or other silicone encapsulating materials; rich resources of titanium lead to the clear price advantage compared with other molybdates and tungstate. It provides favorable conditions for the development of rare earth titanate functional materials. Adjusting the ratio of blue and yellow light can get more pure white light, and the SrxBa1−xTiO3: Eu3+, Gd3+ phosphor is expected to be widely used in the WLED field [18, 19]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
