Bifunctional europium doped SrTiO3 ceramics with energy storage and photoluminescence

Abstract

Rare-earth ion Eu 3+ was doped into SrTiO 3 ceramic to improve its dielectric energy storage properties and act as luminescence centres. Typically, SrTiO 3 ceramics doped with 0.2% Eu 3+ exhibit high breakdown strength up to 354 kV/cm and a relatively high recoverable energy density of 2.13 J/cm 3 . 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 SrTiO 3 ceramic capacitor exhibits an excellent power density of 37 MW/cm 3 in an ultrafast discharge time of 25 nanoseconds at 200 kV/cm. Meanwhile, the Eu 3+ doped sample exhibits obvious red photoluminescence. The bifunctional ceramics offer an excellent prospect for energy storage and optical applications.

Achieving Remarkable Energy Storage Performances under Low Electric Field in Bi0.5N0.5TiO3-SrTiO3-Based Relaxor Ferroelectric Ceramics via a Heterostructure Doping Strategy

“…However, the BNT-ST-0.04SNN ceramic may ensure a considerable W rec (5.22 J/cm 3 ) while having a superior η (93.87%) in this study. Moreover, it should be noted that the W rec / E values of our works are superior to most of the reported ceramics, as shown in Figure f and Table , implying that the obtained BNT-ST-SNN ceramics possess great potential for capacitor applications requiring high energy storage under low electric fields. ,,,− The good polarization behavior is directly responsible for this. Collectively, all of these results show that the ceramic system BNT-ST-0.04SNN is a desirable option for energy storage applications.…”

“…Therefore, the Δ P continuously rises from 18.35 μC/cm 2 to 37.94 μC/cm 2 , as shown in Figure b. To further evaluate the large polarization difference of the BNT-ST-0.04SNN ceramic, the E and Δ P of this study and recent publications are summarized and compared in Figure c. − Obviously, the Δ P of this work is better than those of the other works at the same electric field. These results further demonstrate that a relatively large polarization difference can be realized under a low electric field in the ceramics designed by the heterostructure doping strategy.…”

“…When the applied field reaches 340 kV/cm, a superbly comprehensive ESP is produced, with a notable W rec (5.22 J/cm 3 ) and an excellent η (93.87%). The ESPs obtained in this work are compared to those of various reported promising lead-free ceramics in Figure e. − As can be observed, achieving high η (≥90%) and a large W rec (≥4 J/cm 3 ) concurrently in lead-free ceramics is still very difficult at this time, and a high W rec is always accompanied by poor efficiency. However, the BNT-ST-0.04SNN ceramic may ensure a considerable W rec (5.22 J/cm 3 ) while having a superior η (93.87%) in this study.…”

Ultrahigh energy storage performance of a 0.75Bi0.47Na0.47Ba0.06TiO3-0.25CaTi0.8Sn0.2O3 ceramic under moderate electric fields

“…The excellent integrated energy storage performance achieved can be related to the low tan δ, ultra-small P r , large E b , and induced polyphase nanodomains in the superparaelectric state. In comparison with numerous other energy storage ceramics, consisting of BNT-based, BT-based, NN-based, and other-based ceramics, [18][19][20][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][59][60][61][62][63][64][65] we can clearly see that at high/low electric fields, the W rec and η values are less than 5.5 J cm −3 and 90%, respectively. Encouragingly, the 0.75BNBT-0.25CTS ceramic simultaneously produces high W rec (= 5.81 J cm −3 ), ultra-high η (= 90.5%) and moderate E b , showing a more comprehensive advantage over the lead-free dielectrics reported so far, as given in Fig.…”

Achieving outstanding temperature and frequency stability in NaNbO3-modified (Ba0.94Li0.02La0.04)(Mg0.04Ti0.96)O3 pulse energy storage ceramics

“…Therefore, the t 0.9 value decreases on increasing the electric eld. 3,11,13,29,32,34,[36][37][38][39][40][41][42][43][44] The W d value is slightly less than the W rec value due to the different test systems. 1,2 On the other hand, the rapid switching of the dipole moment during the pulse test system than that of the ferroelectric test system results in an inevitable loss of the energy, causing a W d less than W rec .…”