Modulation-Doped In2O3/ZnO Heterojunction Transistors Processed from Solution
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Khim et al., Adv. Mater. 2017, 1605837.pdf
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ArticleAuthors
Khim, DongyoonLin, Yen-Hung
Nam, Sungho
Faber, Hendrik
Tetzner, Kornelius

Li, Ruipeng
Zhang, Qiang

Li, Jun
Zhang, Xixiang

Anthopoulos, Thomas D.

KAUST Department
Imaging and Characterization Core LabKAUST Solar Center (KSC)
Material Science and Engineering Program
Nanofabrication Core Lab
Physical Science and Engineering (PSE) Division
Thin Films & Characterization
Date
2017-03-15Online Publication Date
2017-03-15Print Publication Date
2017-05Permanent link to this record
http://hdl.handle.net/10754/623020
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This paper reports the controlled growth of atomically sharp In2 O3 /ZnO and In2 O3 /Li-doped ZnO (In2 O3 /Li-ZnO) heterojunctions via spin-coating at 200 °C and assesses their application in n-channel thin-film transistors (TFTs). It is shown that addition of Li in ZnO leads to n-type doping and allows for the accurate tuning of its Fermi energy. In the case of In2 O3 /ZnO heterojunctions, presence of the n-doped ZnO layer results in an increased amount of electrons being transferred from its conduction band minimum to that of In2 O3 over the interface, in a process similar to modulation doping. Electrical characterization reveals the profound impact of the presence of the n-doped ZnO layer on the charge transport properties of the isotype In2 O3 /Li-ZnO heterojunctions as well as on the operating characteristics of the resulting TFTs. By judicious optimization of the In2 O3 /Li-ZnO interface microstructure, and Li concentration, significant enhancement in both the electron mobility and TFT bias stability is demonstrated.Citation
Khim D, Lin Y-H, Nam S, Faber H, Tetzner K, et al. (2017) Modulation-Doped In2O3/ZnO Heterojunction Transistors Processed from Solution. Advanced Materials: 1605837. Available: http://dx.doi.org/10.1002/adma.201605837.Sponsors
D.K., Y.-H.L., H.F., and T.D.A. are grateful to the European Research Council (ERC) AMPRO Project No. 280221 for financial support. Q.Z., J.L., and X.Z., are grateful to KAUST for the financial support. CHESS was supported by the NSF & NIH/NIGMS via NSF Award DMR-1332208.Publisher
WileyJournal
Advanced MaterialsAdditional Links
http://onlinelibrary.wiley.com/doi/10.1002/adma.201605837/fullae974a485f413a2113503eed53cd6c53
10.1002/adma.201605837