Effects of charge compensation on the luminescence behavior of Eu3+ activated CaWO4 phosphor

Improved luminescent properties of Eu3+ activated phosphor α-Sr2P2O7 by charge compensation

“…And this should be one of the reasons for the enhanced luminescent properties. [9][10][11][12][13][14]. It is concluded that these samples fit well with the near ultraviolet (NUV) and blue LED chips, and thus can be excited by NUV and blue light.…”

“…, which is chemically unstable for the releasing of SO 2 gas and become less efficient. Nowadays, many new-type red phosphors have been studied, such as nitrides [6], borates [7,8], tungstates [9], molybdates [10][11][12] and phosphates [13][14][15]. Although nitrides are considered to be potential red phosphors for good stability and high efficiency, the harsh synthesis conditions still limited their applications.…”

Preparation and luminescence property of Sm‐doped ZnWO4 powders and films with wet chemical methods

“…2) the ZnWO 4 with a monoclinic sanmartinite structure was the main phase of the Sm-doped ZnWO 4 powders. The peak at ~28.60° was identified as the samarium tungstates, and also belong to that of sanmartinite, ZnWO 4 , as believed in some papers [20][21][22]. The XRD peaks were obviously lower for Smdoped ZnWO 4 powders than for the ZnWO 4 powders although a higher calcining temperature was used, indicating that the crystal growth was inhibited and the crystallinity was decreased by the Sm substitution.…”

Eu3+ Doped CaWO4—A Potential Red Long Afterglow Phosphor

“…2(a) that a broad chargetransfer (CT) band from 210 to 360 nm with a maximum intensity around at 272 nm in the UV region is observed. The CT band in this figure is due to the absorption of photons in the WO 2− 4 group, the electrons of the WO 2− 4 group can be excited from the oxygen 2p states to tungsten 5d states [9]. The narrow peaks in the range of 360-550 nm are ascribed to the intra-configurational f-f transitions of Eu 3+ .…”