Rekha Rani P, Venkateswarlu M, Swapna K, Mahamuda Sk, Rao A S
Department of Physics, Koneru Lakshmaiah Educational Foundation, Vaddeswaram-522 502, Guntur (Dt.), Andhra Pradesh, India.
Department of Physics, Koneru Lakshmaiah Educational Foundation, Vaddeswaram-522 502, Guntur (Dt.), Andhra Pradesh, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Nov 5;320:124438. doi: 10.1016/j.saa.2024.124438. Epub 2024 May 27.
Barium lead alumino fluoroborate (BaPbAlFB) glasses singly and co-doped with Dy and Eu ions were prepared by melt quench method and studied their photoluminescence (PL) properties along with energy migration. Singly doped Dy/Eu ions in BaPbAlFB glasses under 365 and 393 nm excitation wavelengths emit the PL bands through Dy: (F → H and F → H) and Eu: (D→F) transitions located at (Dy: 483 and 575 nm) and (Eu: 613 nm) respectively. Further, tunability of PL emissions is achieved by exciting the Dy/Eu co-doped BaPbAlFB glasses at various wavelengths. The obtained CIE (0.34, 0.33) and CCT value (5080.4 K) of Dy/Eu co-doped BaPbAlFB glass produced white light emission under 365 nm excitation wavelength. The corresponding CCT values of Dy/Eu co-doped BaPbAlFB glasses varied from 1580 to 5080 K and their corresponding color emission changes from intense red to white light regime quite suitable for fabrication of epoxy-free w-LED devices.
采用熔融淬火法制备了单掺杂镝（Dy）和铕（Eu）离子以及共掺杂Dy和Eu离子的钡铅铝氟硼酸盐（BaPbAlFB）玻璃，并研究了它们的光致发光（PL）特性以及能量迁移情况。在365和393nm激发波长下，BaPbAlFB玻璃中单掺杂的Dy/Eu离子通过Dy的（F→H和F→H）跃迁以及Eu的（D→F）跃迁分别在（Dy：483和575nm）以及（Eu：613nm）处发射PL带。此外，通过在不同波长下激发Dy/Eu共掺杂的BaPbAlFB玻璃实现了PL发射的可调谐性。在365nm激发波长下，Dy/Eu共掺杂的BaPbAlFB玻璃获得的CIE值（0.34，0.33）和CCT值（5080.4K）产生了白光发射。Dy/Eu共掺杂的BaPbAlFB玻璃的相应CCT值在1580至5080K之间变化，其相应的颜色发射从强烈的红色变为白光区域，非常适合用于制造无环氧树脂的白光发光二极管（w-LED）器件。
