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Hydrogenated In–Ga–Zn–O thin-film transistors with anodized and fluorinated Al2O3 gate insulator for flexible devices
Japanese Journal of Applied Physics ( IF 1.5 ) Pub Date : 2021-02-11 , DOI: 10.35848/1347-4065/abdf74
Syuya Kono 1 , Yusaku Magari 1, 2 , Marin Mori 1 , S. G. Mehadi Aman 1 , Norbert Fruehauf 3 , Hiroshi Furuta 2, 4 , Mamoru Furuta 1, 2
Affiliation  

For the purpose of developing In–Ga–Zn–O (IGZO) thin-film transistors (TFTs) on a flexible substrate, low-temperature (150 C) processed hydrogenated IGZO (IGZO:H) TFTs with anodize alumina gate insulator (Al2O3 GI) have been developed. We found that fluorination of the Al2O3 GI surface significantly improves field effect mobility (μ FE) and positive gate bias and temperature stress (PBTS) reliability of the TFTs. μ FE of 28.8 cm2 V−1s−1 and good PBTS reliability were obtained from the IGZO:H TFTs with a 68 nm thick fluorinated Al2O3 GI. X-ray photoelectron spectroscopy analysis revealed that fluorine in the AlOF x formed at the Al2O3 surface played an important role in improving performance and PBTS reliability of low-temperature-processed oxide TFTs for future flexible device applications.



中文翻译:

氢化In-Ga-Zn-O薄膜晶体管,带有阳极氧化和氟化Al 2 O 3栅极绝缘体,用于柔性器件

为了在柔性基板上开发In-Ga-Zn-O(IGZO)薄膜晶体管(TFT),经过低温(150 C)处理的氢化IGZO(IGZO:H)TFT具有阳极氧化铝栅极绝缘体(Al已开发出2 O 3 GI)。我们发现将Al的该氟化2 ö 3 GI表面显著提高场效应迁移率(μ FE)和正的栅极偏压和TFT的温度应力(PBTS)的可靠性。μ FE的28.8厘米2 V -1小号-1和从该IGZO获得良好的可靠性PBTS:用68纳米的TFTħ厚氟化的Al 2 ö 3GI X射线光电子能谱分析表明,在Al 2 O 3表面形成的AlOF x中的氟在提高低温处理的氧化物TFT的性能和PBTS可靠性方面起着重要的作用,适用于未来的柔性器件。

更新日期:2021-02-11
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