Postdeposition thermal annealing influence on the activation of the cosputtered AlN-ZnO films

Shiau Lu Yao, Jhen Dong Hong, Chung Yen Ho, Ching Ting Lee, Day Shan Liu

研究成果: Conference contribution


Cosputtered aluminum nitride-zinc oxide (AlN-ZnO) films at a theoretical atomic ratio of 10% [Al / (Al + Zn) at.%] were postannealed at 450°C for 30 min under ambient nitrogen and vacuum, respectively. The activated impurities in these annealed samples were investigated through the room-temperature (RT) and low-temperature (LT) photoluminescence (PL) spectra as well as their temperature-dependent Hall-effect measurements. It was found that the donor-acceptor-pair (DAP) emission related to VZn-AlZn transition at 2.86 eV predominated over the defect-transition luminescence in the RTPL spectrum of the vacuum-annealed sample, for which possessed a high electron carrier concentration. With the help of the temperature-dependent Hall measurement, the shallow donor level corresponded to Al on Zn site (Al Zn) was derived as EC-(51±4) meV. By contrast, the RTPL spectrum of the nitrogen-annealed AlN-ZnO cosputtered film, showing p-type conduction with a hole concentration of 1018 cm-3, was dominated by the VO-NO deep level emission approximately at 1.87 eV. The estimated acceptor level corresponded to the N on O site (N O) was EV+ (149±6) meV. The binding energy and activation energy associated with the NO acceptor were also determined by the LTPL and temperature-dependent PL spectra.

主出版物標題Functional and Electronic Materials
發行者Trans Tech Publications Ltd
出版狀態Published - 2011


名字Materials Science Forum

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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