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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 668p-Type Field Effect Transistor and...

p-Type Field Effect Transistor and UV-Photoconductive Characteristics of Na Doped ZnMgO Thin Films

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Abstract:

In this study, the authors have presented results for fabricated ZnO based FET and the UV-photoconductive characteristics of Na doped ZnMgO thin ﬁlms. The electrical measurements confirmed that the conductivity of the Na doped ZnMgO thin ﬁlm is p-type, and the carrier mobility was estimated to be 2.3 cm2V-1S-1. Moreover, after exposed to the 365 nm ultraviolet light, the Na doped ZnMgO thin ﬁlms still exhibited p-type behavior under gate voltage ranging from -5 to 2 V, and the Id increased a little while the carrier mobility did not change much. The photocurrent was measured under a bias of 6 V in air at room temperature. The films performed a higher current intensity after the illumination. The instantaneous rise of the photocurrent was completed when exposed to the 365 nm ultraviolet for 20 s, after switching the ultraviolet off the photocurrent decayed in a slower rate. The enhance rate of photocurrent was about 1.33 %. Conclusively, Na is a considerable acceptor dopant for making high quality p-type ZnO films, and the tiny change in the photocurrent of p-type Na doped ZnMgO thin ﬁlm made it relatively stable when fabricating LEDs and other optoelectronic devices.

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Materials Science and Engineering II

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Periodical:

Advanced Materials Research (Volume 668)

Pages:

681-685

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.668.681

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Online since:

March 2013

Authors:

Ya Xue, Hai Ping He, Zhi Zhen Ye

Keywords:

Na Doped ZnMgO, Photocurrent, UV Illumination, ZnO Based FET

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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