Abstract
Rare-earth ion Eu3+ was doped into SrTiO3 ceramic to improve its dielectric energy storage properties and act as luminescence centres. Typically, SrTiO3 ceramics doped with 0.2% Eu3+ exhibit high breakdown strength up to 354 kV/cm and a relatively high recoverable energy density of 2.13 J/cm3. Compared to those of the undoped sample, the doped ceramic breakdown strength and recoverable energy density are enhanced by about 22% and 58%, respectively. The doping effect can be explained by the inhibition of the long-range movement of carriers. Moreover, the europium doped SrTiO3 ceramic capacitor exhibits an excellent power density of 37 MW/cm3 in an ultrafast discharge time of 25 nanoseconds at 200 kV/cm. Meanwhile, the Eu3+ doped sample exhibits characteristic red photoluminescence. The bifunctional ceramics offer an excellent prospect for energy storage and optical applications.
Highlights
Multifunctional materials are becoming a demand with the rapid development of electronic, optoelectronic, and energy devices [1,2,3]
For energy storage property evaluation, the polarisation-electric field (P-E) curves were measured by a ferroelectric analyser (TF Analyzer 3000), and the breakdown strength was measured by RK2671AM
SrTiO3 (PDF#35-0734) with perovskite structure is confirmed as the only phase in all the Sr1-3x/2EuxTiO3 ceramics, and no impurity phase is detected from the XRD results
Summary
Multifunctional materials are becoming a demand with the rapid development of electronic, optoelectronic, and energy devices [1,2,3]. SrTiO3, as an incipient ferroelectric, has always been an essential electronic ceramic material due to its versatile properties, e.g., magnetic, luminescent, and dielectric characteristics via ion doping [4,5,6]. It has received increasing attention in the field of energy storage because it possesses a relatively high dielectric constant (εr), low dielectric loss, and moderate dielectric breakdown strength (Eb) [7,8,9]. Increasing the energy density (W) of dielectric capacitors is a major challenge as it is significantly inferior to other energy storage devices such as supercapacitors and batteries. Zhu et al It is found that adding an appropriate amount of
Sign-in/Register to view highlights & summary 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.
