Abstract
New and low energy consumption Li6AlGd(BO3)4: Dy3+ phosphors were fabricated through solid-state-reaction technique and characterized for lighting applications. The crystalline phase was confirmed from the powder X-ray diffraction technique. The Fourier transform infrared analysis was employed to investigate the presence of different bondings. The distribution of particles and their agglomeration was examined via morphological studies. Photoluminescence excitation, emission and decay studies were employed to study the luminescence properties. The excitation wavelength was optimized as 350 nm for efficient and strong luminescence from Li6AlGd(BO3)4: Dy3+ phosphors. They emit efficient luminescence through 4F9/2 → (6H15/2, 6H13/2, 6H11/2) transitions when excited at 350 nm near-UV wavelength. The photometric parameters such as chromaticity coordinates, colour purity and correlated colour temperature were determined using the emission spectral results. The quantum efficiency and the quantum yield parameters of studied phosphors show their applicability for lighting devices. The Li6AlGd(BO3)4: xDy3+ phosphor with x = 1.0 mol% has highest proficiency for lighting applications.
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 call
