Investigation of thermal diffusivity dependence on temperature in a group of optical single crystals doped with rare earth ions

Effect of lattice disorder on the thermal conductivity of ZnBeSe, ZnMgSe and ZnBeMgSe crystals

“…3a presents phase characteristics of selected Zn 1Àx Mg x Se specimens as a function of modulation frequency, points refer to measured data, and lines are best fits obtained with least square method using Eq. (8). The coefficient of determination, denoted R 2 , for Zn 0.94 Mg 0.06 Se example crystal can be found in Fig.…”

“…Phase characteristics of selected Zn 1Àx Mg x Se crystals as a function of modulation frequency (a), points refer to measured data, lines are best fits obtained with least square method using Eq. (8). Example fit for Zn 0.94 Mg 0.06 Se crystal (b) and the error of the fitting procedure (see inset) was also displayed in.…”

Refractive index and lattice parameter prediction for garnets (A3B2C3X12)

“…Many physical properties have a strong functional dependence or correlation with lattice parameter (a), or a derivative metric such as average volume per atom or average bond length. [65][66][67][68][69][70][71][72][73][74][75][76][77][78] The same cations occupy both the tetrahedral and octahedral sites in common ternary garnets such as the rare-earth aluminates (Ln 3 Al 5 O 12 ), ferrates (Ln 3 Fe 5 O 12 ), and gallates (Ln 3 Ga 5 O 12 ). In these garnets a increases linearly with rare-earth ion size.…”

Influence of P3HT:PCBM Ratio on Thermal and Transport Properties of Bulk Heterojunction Solar Cells

“…Both these processes are determined by the energy band gap, carrier lifetime and thermal properties of the layer. BDS is therefore suitable for in-situ measurements, allowing continuous monitoring of the processes governing the synthesis of the layers, and determination of thermal, optical and transport properties of multilayered materials [ 20 , 21 , 22 , 23 ]. The use of BDS to characterize the charge and thermal transport offers the possibility to determine thermal diffusivity and conductivity, energy band gap and carrier lifetime of organic solar cells in a single analysis, while performing the measurements in a non-contact and non-destructive way [ 24 , 25 , 26 ].…”