Synthesis, luminescence and application of BaKYSi2O7:Eu2+: A new blue-emitting phosphor for near-UV white-light LED

Novel cyan‐emitting KBaScSi2O7:Eu2+ phosphors with ultrahigh quantum efficiency and excellent thermal stability for WLEDs

“…The excellent reversible thermal behaviors and thermal fatigue resistance performance of the as‐prepared phosphor possibly results from the rigid structure network and coordination environment of Eu 2+ in the KBSS host. Besides, KBSS:Eu 2+ exhibit better thermal stability compared to the reported KBaYSi 2 O 7 :Eu 2+ (83.2%), resulting from the smaller bond angles and the bond lengths than that of KBaYSi 2 O 7 ones. This result demonstrates that KBSS possess a more rigid structure, which results in less thermal loss of energy or lower thermal vibration at higher temperature .…”

“…Since the KBSS is a new host, the related structural information is deficient, thus, we used the reported crystallographic data of KSrScSi 2 O 7 as the initial structure model . The compound KBSS belong to the family of KMRESi 2 O 7 (M = Ba 2+ , Sr 2+ and RE = Y 3+ , Sc 3+ ), which has a monoclinic structure with the space group of P 2 1 / n . Structural refinements converged with the residual values of R p = 8.76% and R wp = 11.23%.…”

Achievement of narrow-band blue-emitting phosphors KScSr1−yCaySi2O7:Bi3+ by the migration of luminescence centers

“…And the two cations are "stacked" in narrow channels, and they are arranged in strict order. 16 In the KMRESi 2 O 7 family, KSSS has a relatively small bond angle and bond length, which infers that it has a more rigid structure. There are three cation sites in KSSS, K + (r ¼ 1.55 A, CN ¼ 9), Sr 2+ (r ¼ 1.26 A, CN ¼ 8) and Sc 3+ (r ¼ 0.745 A, CN ¼ 6).…”

High Efficiency Emission of Eu2+ Located in Channel and Mg‐Site of Mg2Al4Si5O18 Cordierite and Its Potential as a Bi‐Functional Phosphor toward Optical Thermometer and White LED Application

“…Silicates and aluminosilicates have been widely investigated in recent years as luminescent materials due to their high chemical and thermal stability. [1][2][3][4][5][6] Researchers paid special attention to materials that were doped with Eu 2+ ions because of their promising applicability in the light-emitting diode (LED) system. As a result of the parity-allowed 4f-5d transition of Eu 2+ , the broad emission band with short decay time of about a few µs is generated.…”