Abstract

This paper for the first time presents a performance comparison between junction and junctionless thin-film transistors (TFTs) by using TCAD simulations. Note that the DIBL and S.S. of a junctionless TFT (JLTFT) are larger and higher, respectively, than those of its junction TFT (JTFT) counterpart. Although the JLTFT gets a higher current drive based on the same V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ov</sub> as compared with the JTFT, its short-channel characteristics are worse and degraded. These results can be attributed to the fact that the major carriers in channel region for a JTFT make itself a barrier to carrier scattering, whereas, the JTFT does not have this problem, leading to get a high current drive. On the other hand, it may be owing to the grain boundary effects for a JLTFT to degrade its short-channel behavior. Fortunately, these results are still acceptable for scaled dimensions of TFTs.

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