Abstract
Thin films of transparent conducting oxides (TCO) are technologically important for applications as a visible light transparent electrode in a wide variety of optoelectronic devices. In the last few years, researchers started to explore novel size- and shape-dependent properties of TCO, where the crystallite size is ∼10 nm. So far, the localized surface plasmon resonance (LSPR) properties of TCO nanocrystals (NCs) have been found to be the most interesting. TCOs like Sn-doped In2O3, Al-doped ZnO and In-doped CdO NCs, exhibit LSPR band in near- to mid-infrared region. LSPR from a TCO NC exhibits many intrinsic differences with that of a metal NC. Carrier density in a TCO NC can easily be tuned by controlling the dopant concentration, which allows the LSPR band to be tuned over a range of ∼2000 nm (∼0.62 eV) in the near- to mid-infrared region. This review discusses recent advances in the understanding of plasmonic properties of various TCO NCs and highlights the potential applications of such unique plasmonic properties.
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Acknowledgements
AN acknowledges Science and Engineering Research Board (SERB) Govt. of India for the Ramanujan Fellowship (SR /S2 /RJN-61 /2012).
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TANDON, B., ASHOK, A. & NAG, A. Colloidal transparent conducting oxide nanocrystals: A new infrared plasmonic material. Pramana - J Phys 84, 1087–1098 (2015). https://doi.org/10.1007/s12043-015-1008-6
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DOI: https://doi.org/10.1007/s12043-015-1008-6