Issue 7, 2013
From the journal:

Journal of Materials Chemistry C

The structural, optical and electrical characterization of high-performance, low-temperature and solution-processed alkali metal-doped ZnO TFTs†

Si Yun Park,a   Kyongjun Kim,a   Keon-Hee Lim,a   Beom joon Kim,b   Eungkyu Lee,a   Jeong Ho Chob  and  Youn Sang Kim*ac  

* Corresponding authors

a Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, 864-1 Iui-dong, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-720, Republic of Korea
E-mail: younskim@snu.ac.kr
Fax: +82-31-888-9148
Tel: +82-33-888-9131

b SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon-si, Gyeonggi-do 440-746, Republic of Korea
E-mail: jhcho94@gmail.com

c Advanced institutes of convergence technology, 864-1 Iui-dong, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-270, Republic of Korea

Abstract

The structural, electrical and optical properties of high-performance, low-temperature and solution-processed alkali metal-doped ZnO TFTs were studied using various analytic instruments, including HR-TEM, AFM, XPS, EDS, electrical bias stability test and UV-vis spectroscopy. Furthermore, we successfully demonstrated that a change in the optical bandgap energy of Li-doped ZnO semiconductor films supported by Burstein–Moss theory can show a trade-off relationship between the field effect mobility of Li-ZnO TFTs and the Li doping concentrations. The relative broadening of the Eopt values, which are strongly related to the amount of excited electrons from the Fermi level in the valance band to the conduction band, was observed from the undoped ZnO film to the Li-doped ZnO film (10 mol%). The increase in the electron donor concentration was the dominant reason for the enhancement in the electron mobility of the alkali metal-doped ZnO TFTs.

Graphical abstract: The structural, optical and electrical characterization of high-performance, low-temperature and solution-processed alkali metal-doped ZnO TFTs

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Article information

DOI
https://doi.org/10.1039/C2TC00559J
Article type
Paper
Submitted
05 Nov 2012
Accepted
11 Dec 2012
First published
13 Dec 2012

J. Mater. Chem. C, 2013,1, 1383-1391

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The structural, optical and electrical characterization of high-performance, low-temperature and solution-processed alkali metal-doped ZnO TFTs

S. Y. Park, K. Kim, K. Lim, B. J. Kim, E. Lee, J. H. Cho and Y. S. Kim, J. Mater. Chem. C, 2013, 1, 1383 DOI: 10.1039/C2TC00559J

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