کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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726820 | 892653 | 2013 | 5 صفحه PDF | دانلود رایگان |
The electrical and optical properties of zinc oxide (ZnO) films doped with different Na contents and grown by pulsed laser deposition were investigated. Hall measurements witnessed the conductivity conversion from n-type to p-type with targeted Na doping content increased up to more than 1%. The photoluminescence intensity first decreased as the targeted Na content increased to 1%, while non-degraded and even enhanced PL intensity was observed in p-type ZnO:Na0.02 film. This photoluminescence enhancement was ascribed to enhanced radiative recombination with more acceptor (NaZn) introduced. The band-gap shift of ZnO:Nax films was related to the variation of carrier type and concentration. Band-gap shrinkage was adopted to explain the carrier type- and concentration-dependent band-gap shift of ZnO:Nax films.
Journal: Materials Science in Semiconductor Processing - Volume 16, Issue 3, June 2013, Pages 647–651