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Keon-Hee Lim, Kyongjun Kim, Seonjo Kim, Si Yun Park, Hyungjun Kim and Youn Sang Kim UV–Visible Spectroscopic Analysis of Electrical Properties in Alkali Metal-Doped Amorphous Zinc Tin Oxide Thin-Film Transistors Advanced Materials 25

Version of Record online: 25 APR 2013 | DOI: 10.1002/adma.201204236

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Solution-processed and alkali metals, such as Li and Na, are introduced in doped amorphous zinc tin oxide (ZTO) semiconductor TFTs, which show better electrical performance, such as improved field effect mobility, than intrinsic amorphous ZTO semiconductor TFTs. Furthermore, by using spectroscopic UV–visible analysis we propose a comprehensive technique for monitoring the improved electrical performance induced by alkali metal doping in terms of the change in optical properties. The change in the optical bandgap supported by the Burstein-Moss theory could successfully show a mobility increase that is related to interstitial doping of alkali metal in ZTO semiconductors.

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