Transport and Thermopower Studies of Indium Tin Oxide Films

• Main Authors: Jui-Kan Lee, 李瑞康
• Other Authors: Chih-Yuan Wu
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/41260849119722087583

碩士 === 輔仁大學 === 物理學系 === 98 === We have measured the resistance, thermopower and magnetoresistance of a series of annealed indium tin oxide (ITO) thin films (thickness 21nm) and compared with Bloch-Grüneisen law, Seebeck effect and two-dimensional weak-localization effect, respectively. We extracted Debye temperature , electron-phonon coupling constant , Fermi energy , carrier concentration , phase breaking time . This observation provided a direct experimental proof of the free-electron-like characteristic of the energy band structure of ITO. Besides, our results also revealed the electron-phonon interaction was very weak in ITO films. Our extracted values of ~1050 K and cm-3 are very close to previous studies, and are larger one order of magnitude than metals.