Green-emissive textured Zn2SiO4:Mn2+ phosphor film was fabricated by a thermal diffusion of ZnO:Mn on
quartz glass. The characterization has been performed in terms of Mn2+ ions concentration (Mn/Zn=1~9 mol %). As an
increase of Mn2+ ions concentration in the Zn2SiO4:Mn2+ phosphor film, the emission peak was red shifted from 519 nm
to 526 nm, and the decay time to 10% of the maximum intensity was shorter from 20 ms to 0.5 ms. All annealed
Zn2SiO4:Mn2+
phosphor films became textured along some hexagonal directions on the amorphous quartz glass. The
brightest Zn2SiO4:Mn2+
film at optimal Mn2+ concentration of 5 % showed the photoluminescence brightness of 65 %
and the shortened decay time of 4.4 ms in comparison with a commercially Zn2SiO4: Mn2+ powder phosphor screen. The
excellencies can be attributed to a unique textured structure.
Ce3+/Mn2+-codoped Ba1.20Ca0.8-2x-ySiO4:xCe3+, xLi+, yMn2+ phosphors show two emission bands peaking at around 600
nm (red) and 400 nm (deep-blue) from the forbidden 4T1-6A1 transition of Mn2+ ions and the allowed 4f-5d transition of
Ce3+ ions, respectively. Eu2+-doped Ba1.20Ca0.7SiO4:0.1Eu2+ phosphor shows a broad green emission band from 430 to
550 nm from the allowed f-d transition in Eu2+ ions. The mixtures of both phosphors, excited by the near ultraviolet of
365 nm, show the various qualities of white lights depending on the mixture ratio; the correlated color temperatures from
3500 to 7000 K, and the color-rendering indices up to 95 %. Furthermore, they show a high quenching temperature of
about 225 °C.
KEYWORDS: Light emitting diodes, Luminescence, Solid state lighting, Diodes, Ions, Energy transfer, Absorption, Near ultraviolet, Crystals, Solid state physics
A novel blue-emitting phosphor, Sr3Ga2O5Cl2:Eu2+, was synthesized by a two-step solid-state reaction. It has the
monoclinic structure with six different cation sites. It shows an efficient broad absorption band around the 400 nm of the
commercial near ultraviolet light-emitting diodes (LEDs), and an intense broad blue emission. Thus, it can be a
promising blue phosphor for white LED for solid state lighting.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.