Five different compositions of KxV2O5-nH2O （where prepared by the sol-gel process. Electrical conductiv x=0.00, 0.0017, 0.0049, 0.0064 and 0.0091 mol） were ty and thermoelectric power were measured parallel to the substrate surface in the temperature range of 300-480 K. The electrical conductivity showed that all samples were semiconductors and that conductivity increased with increasing K content. The conductivity of the present system was primarily determined by hopping carrier mobility. The carrier density was evaluated as well. The conduction was confirmed to obey non-adiabatic small polaron hopping. The thermoelectric power or Seebeck effect, increased with increasing K ions content. The results obtained indicated that an n-type semiconducting behavior within the temperature range was investigated.
参考文献
| [1] | A.A. Bahgat;F.A. Ibrahim;M.M. El-Desoky .Electrical and optical properties of highly oriented nanocrystalline vanadium pentoxide[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2005(1/2):68-73. |
| [2] | V. L. Volkov;N. V. Podval'naya .Electrical Conductivity of M_2V_(12)O_(30) • nH_2O (M = K, Rb, Cs)[J].Inorganic materials,2004(11):1217-1220. |
| [3] | A. A. Bahgat;A. Al-Hajry;M. M. El-Desoky .Giant extrinsic negative thermal expansion in vanadium pentoxide nanocrystalline films[J].Physica Status Solidi, A. Applied Research,2006(8):1999-2006. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%