Infrared and X-ray absorption studies of CdTe thin films

Wenjie Wang*, Yu Cheng Yang, Ting Shan Chan, Peng Chen, Tzuen Rong Yang, Zhe Chuan Feng


研究成果: 書貢獻/報告類型會議論文篇章


CdTe is an important material for thin film solar cells and radiation detectors, and with very small lattice mismatch of about 0.01% to InSb. Here, we study on a series of CdTe thin films on InSb substrate under different ion time and temperature from molecular beam epitaxy (MBE), by infrared reflectance (IRR) spectroscopy and extended X-ray absorption fine structure (EXAFS). Samples were measured by infrared reflectance spectroscopy. Simulation/fittings were performed to obtain their values of transverse optical (TO) phonon frequency, damping constant, mode strength, carrier concentration, etc. The local atomic structure and phonon properties as well as effects by the ion cleaning conditions are obtained. Samples were also measured by extended X-ray absorption fine structure (EXAFS). X-ray absorption spectra were collected at Cd K-edge (∼26711 eV) in 26500-27700 eV and X-ray fluorescence yield mode. After data processing, Fourier transform and program fittings, the bond lengths of the 1st nearest Cd-Te and 2nd nearest Cd-Cd atomic bonding as well as the coordination numbers are obtained.

主出版物標題Thin Film Solar Technology IV
出版狀態已發佈 - 2012
事件Thin Film Solar Technology IV - San Diego, CA, 美国
持續時間: 2013 8月 122013 8月 13


名字Proceedings of SPIE - The International Society for Optical Engineering


會議Thin Film Solar Technology IV
城市San Diego, CA

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程


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