| Abstract: | Mn2 has been synthesized by a new sulfurizing flux method, and the phosphors prepared in this way is relatively stable in water. The fluorescent spectra of CaS host and CaS: Mn2 have been measured at room temperature. The luminescent centers formed by O2- ions may be responsible for the host's blue - green emission. The complete disappearance of this emission in CaS: Mn2 system confirms that there exists efficient energy transfer from the host to the Mn2 centers. The decay characteristics have been performed. The photoluminescence decay of CaS: Mn2 consists of slow and fast components due to the single and paired Mn2 centers, respectively. |
