%0 Journal Article
%A Zhang, Xuejie
%A Fang, Mu-Huai
%A Tsai, Yi-Ting
%A Lazarowska, Agata
%A Mahlik, Sebastian
%A Lesniewski, Tadeusz
%A Grinberg, Marek
%A Pang, Wei Kong
%A Pan, Fengjuan
%A Liang, Chaolun
%A Zhou, Wuzong
%A Wang, Jing
%A Lee, Jyh-Fu
%A Cheng, Bing-Ming
%A Hung, Tsu-Lien
%A Chen, Yang-Yuan
%A Liu, Ru-Shi
%D 2017
%T Controlling of Structural Ordering and Rigidity of
β‑SiAlON:Eu through Chemical Cosubstitution to Approach
Narrow-Band-Emission for Light-Emitting Diodes Application
%U https://acs.figshare.com/articles/journal_contribution/Controlling_of_Structural_Ordering_and_Rigidity_of_SiAlON_Eu_through_Chemical_Cosubstitution_to_Approach_Narrow-Band-Emission_for_Light-Emitting_Diodes_Application/5270122
%R 10.1021/acs.chemmater.7b01697.s001
%2 https://acs.figshare.com/ndownloader/files/9016753
%K emission band
%K excitation wavelength
%K emission intensity
%K SiAlON
%K emission spectra
%K charge state
%K vibronic repetitions
%K β-
%K crystal field strength
%K wide-gamut backlighting devices
%K Structural Ordering
%K Eu
%K tunable narrow-band-emission
%K Chemical Cosubstitution
%K decay time
%K Approach Narrow-Band-Emission
%K photoluminescence emission
%K room temperature
%X Narrow-band green-emitting
phosphor β-SiAlON:Eu has been
widely used in advanced wide-gamut backlighting devices. However,
the origins for unusual sharp lines in photoluminescence emission
at room temperature and tunable narrow-band-emission tailored by reducing
Al–O in β-SiAlON:Eu are still unclear. Here, the presence
of sharp-line fine structure in the emission spectra of β-SiAlON:Eu
is mainly due to purely electronic transitions (zero phonon lines),
and their vibronic repetitions resulting from the multimicroenvironment
around Eu2+ ions that has been revealed by relative emission
intensity of sharp line depends on excitation wavelength and monotonously
increasing decay time. The specific features of the Eu2+ occupying interstitial sites indicate that the effect of crystal
field strength can be neglected. Therefore, the enhanced rigidity
and higher ordering structure of β-SiAlON:Eu with decreasing
the substitution of Si–N by Al–O become the main factors
in decreasing electron–lattice coupling and reducing inhomogeneous
broadening, favoring the blue-shift and narrow of the emission band,
the enhanced thermal stability, as well as the charge state of Eu2+. Our results provide new insights for explaining the reason
for narrow-band-emission in β-SiAlON:Eu, which will deliver
an impetus for the exploration of phosphors with narrow band and ordering
structure.
%I ACS Publications