Pateria Deepti, Baghel R N, Bisen D P, Jha Piyush, Chandra V K, Chandra B P
School of Studies in Physics and Astrophysics, Pt. RaviShankar Shukla University, Raipur, (C.G.), India.
Department of Applied Physics, Raipur Institute of Technology, Chhatauna, Mandir Hasuad, Raipur, 492101, (C.G.), India.
Luminescence. 2017 May;32(3):375-381. doi: 10.1002/bio.3189. Epub 2016 Jul 28.
The present paper reports the thermoluminescence (TL) of (ZnS) (MnTe) nanophosphors that were prepared by a wet chemical synthesis method. The structure investigated by X-ray diffraction patterns confirms the formation of a sphalerite phase whose space group was found to be F 4¯3m. From XRD, TEM and SEM analyses the average sizes of the particles were found to be 12 nm, 11 nm and 15 nm, respectively. Initially the TL intensity increased with increasing values of x because the number of luminescence centres increased; however, for higher values of x the TL intensity decreased because of the concentration quenching. Thus the TL, mechanoluminescence and photoluminescence intensities are optimum for a particular value of x, that is for x = 0.05. Thermoluminescence of the (ZnS) (MnTe) nanophosphor has not been reported previously. There were two peaks seen in the thermoluminescence glow curves in which the first peak lay at 105-100 °C and the second peak lay at 183.5-178.5 °C. The activation energies for the first and second peaks were found to be 0.45 eV and 0.75 eV, respectively.
本文报道了通过湿化学合成法制备的（ZnS）（MnTe）纳米磷光体的热释光（TL）。通过X射线衍射图谱研究的结构证实了闪锌矿相的形成，其空间群为F 4¯3m。从XRD、TEM和SEM分析可知，颗粒的平均尺寸分别为12nm、11nm和15nm。最初，TL强度随着x值的增加而增加，因为发光中心的数量增加；然而，对于较高的x值，由于浓度猝灭，TL强度降低。因此，对于特定的x值，即x = 0.05时，TL、机械发光和光致发光强度最佳。此前尚未报道过（ZnS）（MnTe）纳米磷光体的热释光。在热释光发光曲线中观察到两个峰，其中第一个峰位于105-100°C，第二个峰位于183.5-178.5°C。发现第一个和第二个峰的激活能分别为0.45eV和0.75eV。
