P-type CuO and Cu2O transistors derived from a sol-gel copper (II) acetate monohydrate precursor

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We realize p-type thin film transistors (TFT) with solution-processed channels using a sol-gel route, based on a copper (II) acetate precursor. The sol-gel process initially produces Cu, which is then oxidized depending on sintering conditions to produce Cu2O and ultimately CuO. These processes are performed at temperatures no higher than 500 degrees C, and are therefore compatible with standard display glass substrates for use in transparent display applications. To control the film morphology of the sol-gel processed copper oxide layer, additional water was added to the precursor solution. As the water to alkoxide ratio is increased, the degree of hydrolysis increased, thus increasing the grain size of CuO and Cu2O. The resulting p-type CuO and (CuO)-O-2 TFTs exhibited improved thin film transistor performance, including field effect mobilities of 1.0 x 10(-2) cm2/Vs and 2.0 x 10(-3) cm2/Vs, respectively, and an on/off ratio of approximately 10(3).
Publisher
ELSEVIER SCIENCE SA
Issue Date
2016-02
Language
English
Article Type
Article
Keywords

THIN-FILM TRANSISTORS; OXIDE SEMICONDUCTORS; LOW-TEMPERATURE; OXIDATION; MOBILITY; CELLS; ZNO; DEVICES; SIZE; AIR

Citation

THIN SOLID FILMS, v.600, pp.157 - 161

ISSN
0040-6090
DOI
10.1016/j.tsf.2016.01.036
URI
http://hdl.handle.net/10203/207947
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