Abstract:
:This study examined the performance and photo-bias stability of double-channel ZnSnO/InZnO (ZTO/IZO) thin-film transistors. The field-effect mobility (μFE) and photo-bias stability of the double-channel device were improved by increasing the thickness of the front IZO film (t(int)) compared to the single-ZTO-channel device. A high-mobility (approximately 32.3 cm(2)/Vs) ZTO/IZO transistor with excellent photo-bias stability was obtained from Sn doping of the front IZO layer. First-principles calculations revealed an increase in the formation energy of O vacancy defects in the Sn-doped IZO layer compared to the IZO layer. This observation suggests that the superior photo-bias stability of the double-channel device is due to the effect of Sn doping during thermal annealing. However, these improvements were observed only when t(int) was less than the critical thickness. The rationale for this observation is also discussed based on the oxygen vacancy defect model.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Jung HY,Kang Y,Hwang AY,Lee CK,Han S,Kim DH,Bae JU,Shin WS,Jeong JKdoi
10.1038/srep03765subject
Has Abstractpub_date
2014-01-20 00:00:00pages
3765issn
2045-2322pii
srep03765journal_volume
4pub_type
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