Vth shift in single-layer graphene field-effect transistors and its correlation with Raman inspection

Raman measurement is carried out to understand Vth shift in single-layer graphene field-effect transistors (GFETs). The G (2D) peak shift in Raman spectra is correlated to the corresponding ΔVth during stress and recovery phases. A blue (red) shift of G and 2D peaks is seen during stress (recovery)...

وصف كامل

محفوظ في:
التفاصيل البيبلوغرافية
المؤلفون الرئيسيون: Wei, J., Liu, W. J., Fang, Z., Wang, Z. R., Wang, F., Wu, L., Zhang, J. F., Zhu, H. L., Sun, Xiaowei, Tran, Xuan Anh, Yu, Hongyu
مؤلفون آخرون: School of Electrical and Electronic Engineering
التنسيق: مقال
اللغة:English
منشور في: 2013
الموضوعات:
الوصول للمادة أونلاين:https://hdl.handle.net/10356/102793
http://hdl.handle.net/10220/16505
الوسوم: إضافة وسم
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المؤسسة: Nanyang Technological University
اللغة: English
الوصف
الملخص:Raman measurement is carried out to understand Vth shift in single-layer graphene field-effect transistors (GFETs). The G (2D) peak shift in Raman spectra is correlated to the corresponding ΔVth during stress and recovery phases. A blue (red) shift of G and 2D peaks is seen during stress (recovery) phase, indicating the corresponding trapping (detrapping) effects in the graphene device. It is interesting to note that, after forming gas annealing (H2/Ar), the defects can be generated in graphene (evidenced by D peak of Raman spectra), leading to the increased ΔVth for both negative bias temperature instability and positive bias temperature instability in single-layer GFETs.