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Low-temperature combustion synthesis and UV treatment processed p-type Li:NiOx active semiconductors for high-performance electronics

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Abstract

Solution-processed thin film transistors (TFTs) in the next generation of large-area flexible electrics not only need oxide semiconductors with high performance but also require them with low-temperature processability. To meet these requirements, we developed a low-temperature method, that is, combining solution combustion synthesis and deep-ultraviolet irradiation to prepare p-type Li-doped NiOx (Li:NiOx) thin films at 150 °C. The incorporation of Li into the NiOx matrix significantly improves p-type conductivity of NiOx because the Fermi level (EF) shifts toward the valence band maximum. To confirm the possible application of Li:NiOx as the channel layer in TFTs, Li:NiOx/ZrO2/ITO was fabricated on each of rigid glass and flexible PET substrates. This is the first report of application of Li:NiOx semiconductor in TFT devices. The field-effect mobility, Ion/Ioff and subthreshold swing for rigid and flexible Li5%:NiOx TFTs are 1.69 and 1.41 cm2 V−1 s−1, 8 × 106 and 105, 0.21 and 0.54 V dec−1, respectively. Furthermore, the counterclockwise hysteresis of transfer curves is negligible (0.1 V). Thus, the high-performance and cost-effective electronics with low fabrication temperature will definitely contribute to future large-scale flexible and wearable electronics.

Graphical abstract: Low-temperature combustion synthesis and UV treatment processed p-type Li:NiOx active semiconductors for high-performance electronics

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Publication details

The article was received on 11 Sep 2018, accepted on 24 Oct 2018 and first published on 25 Oct 2018


Article type: Paper
DOI: 10.1039/C8TC04594A
Citation: J. Mater. Chem. C, 2018, Advance Article
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    Low-temperature combustion synthesis and UV treatment processed p-type Li:NiOx active semiconductors for high-performance electronics

    J. Yang, B. Wang, Y. Zhang, X. Ding and J. Zhang, J. Mater. Chem. C, 2018, Advance Article , DOI: 10.1039/C8TC04594A

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