%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