Thermal and electrical conductivity of single crystalline kesterite Cu2ZnSnS4
For single crystalline sulfur-based kesterite Cu _2 ZnSnS _4 the electrical and thermal conductivity are measured from 20 K to 320 K. The electrical conductivity decreases exponentially with decreasing temperature. The temperature dependence can be assigned to Mott-variable-range-hopping, an electri...
| الحاوية / القاعدة: | Materials Research Express |
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| المؤلفون الرئيسيون: | , , , , |
| التنسيق: | مقال |
| اللغة: | الإنجليزية |
| منشور في: |
IOP Publishing
2020-01-01
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| الموضوعات: | |
| الوصول للمادة أونلاين: | https://doi.org/10.1088/2053-1591/abc276 |
| الملخص: | For single crystalline sulfur-based kesterite Cu _2 ZnSnS _4 the electrical and thermal conductivity are measured from 20 K to 320 K. The electrical conductivity decreases exponentially with decreasing temperature. The temperature dependence can be assigned to Mott-variable-range-hopping, an electrical transport process within an impurity band in the band gap. With the 3 ω -method a thermal conductivity room temperature value of 5.1 ± 0.5 Wm ^−1 K ^−1 and a maximal value of 8.0 ± 0.5 Wm ^−1 K ^−1 at 100 K are found. Phonon-phonon-umklapp-scattering can explain the high temperature range from 100 K to 320 K. The low temperature values of the thermal conductivity are dominated by the temperature-dependence of the specific heat capacity, due to a reduced phonon-mean-free-path, owing to phonon-impurity-scattering. |
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| تدمد: | 2053-1591 |