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【答案】应助回帖
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爱与雨下: 金币+2 2012-09-22 16:13:14
ll921: 金币+70, 翻译EPI+1, ★★★★★最佳答案 2012-09-23 09:46:57
Dependencies (αhν) hν from 3.2eV energy range of 3.8 EV (387 ~ 326 nm), wherein the two different lines as a native of 1/2 dependence (αhν) 1 / 2hν from 3.2 eV energy range to 3.8 eV (387 to 326 nm), where to see the two different linear growth XXX crystal. In this case, the absorption coefficient data fitting extrapolated to (αhν) 1/2 = 0 Therefore, the value E1 = EGI + EP and E2 = EGI-set has been E1 = 3.38 eV and E2 = 3.2 eV. Thus, indirect energy gap in the phonon energy of the luminescent properties, can be identified as EGI = 1/2 (E1 + E2) = 3.29 eV, and Ep = 1/2 (E1-E2) = 0.09 eV (or 721 cm -1), respectively.
Raman spectroscopy is a useful method to study the the phonon vibration characteristics [9,30]. Figure. Figure 4 shows the polarized Raman spectra as the native XXX crystal at room temperature. As can be seen, its Raman mode 257 (F2G), 308 (for example), 348 (F2G) and the 721 (Ag) cm-1, appears in the geometry of the VV, and Raman mode 257 (F2G), 308 (for example), 348 (F2G) and 478 (F2G) cm-1 Raman modes appear in the VH configuration, which clearly reflects the Raman selection rules. The other two modes, at 154 and 567 cm-1, does not belong to the Raman active mode spinel XXX. Mode at 154 cm-1 is interpreted may be caused by the laser-induced plasma effect. In the 567 cm-1 at the mode assigned to may cause the order - disorder effects of X and X ions in octahedral and tetrahedral [10,11]. In the growth of crystals, x and x of the ion is ordered orientally, so the mode at 567 cm-1 showing the orientation dependent characters. It also can be found in the VV geometric strength phonon mode at 721 cm-1 is very powerful, highest phonon energy (0.09 eV) activities. More importantly, the phonon energy of 721 cm-1 at the Raman spectra of the Raman modes agree completely with the phonon energy is calculated from the absorption spectrum. Therefore, there is reason to believe that the indirect conversion xxx, mainly due to the contribution of the phonon at 721 cm-1.
Crystals. In this case, the absorption coefficient data fitting extrapolated to (αhν) 1/2 = 0 Therefore, the value E1 = EGI + EP and E2 = EGI-set has been E1 = 3.38 eV and E2 = 3.2 eV. Thus, indirect energy gap in the phonon energy of the luminescent properties, can be identified as EGI = 1/2 (E1 + E2) = 3.29 eV, and Ep = 1/2 (E1-E2) = 0.09 eV (or 721 cm -1), respectively.
Raman spectroscopy is a useful method to study the the phonon vibration characteristics [9,30]. Figure. Figure 4 shows the polarized Raman spectra as the native XXX crystal at room temperature. As can be seen, its Raman mode 257 (F2G), 308 (for example), 348 (F2G) and the 721 (Ag) cm-1, appears in the geometry of the VV, and Raman mode 257 (F2G), 308 (for example), 348 (F2G) and 478 (F2G) cm-1 Raman modes appear in the VH configuration, which clearly reflects the Raman selection rules. The other two modes, at 154 and 567 cm-1, does not belong to the Raman active mode spinel XXX. Mode at 154 cm-1 is interpreted may be caused by the laser-induced plasma effect. In the 567 cm-1 at the mode assigned to may cause the order - disorder effects of X and X ions in octahedral and tetrahedral [10,11]. In the growth of crystals, x and x of the ion is ordered orientally, so the mode at 567 cm-1 showing the orientation dependent characters. It also can be found in the VV geometric strength phonon mode at 721 cm-1 is very powerful, highest phonon energy (0.09 eV) activities. More importantly, the phonon energy of 721 cm-1 at the Raman spectra of the Raman modes agree completely with the phonon energy is calculated from the absorption spectrum. Therefore, there is reason to believe that the indirect conversion xxx, mainly due to the contribution of the phonon at 721 cm-1. |
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