Physical Origins and Analysis of Negative-Bias Stress Instability Mechanism in Polymer-Based Thin-Film Transistors

被引:3
|
作者
Lee, Jaewook [1 ,2 ]
Jang, Jaeman [1 ]
Kim, Hyeongjung [1 ]
Lee, Jiyoul
Lee, Bang-Lin [2 ]
Choi, Sung-Jin [1 ]
Kim, Dong Myong [1 ]
Kim, Dae Hwan [1 ]
Kim, Kyung Rok [3 ]
机构
[1] Kookmin Univ, Sch Elect Engn, Seoul 136702, South Korea
[2] Samsung Adv Inst Technol, Mat Res & Dev Ctr, Yongin 446712, South Korea
[3] Ulsan Natl Inst Sci & Technol, Sch Elect & Comp Engn, Ulsan 689798, South Korea
基金
新加坡国家研究基金会;
关键词
Negative-bias stress; instability; polymer; thin-film transistor; density-of-states; redistribution; threshold voltage; ON-current degradation; Schottky contact resistance; FIELD-EFFECT TRANSISTORS; DENSITY-OF-STATES;
D O I
10.1109/LED.2014.2298861
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The physical origins of the negative-bias stress (NBS) instability in polymer-based thin-film transistors have been characterized. Through the quantitative analysis by TCAD simulation for the NBS time-dependent experimental results, the threshold voltage (V-T)-shift by sub-bandgap density-of-states redistribution forms 70% and 78% for the measured total V-T-shift while V-T-shift by gate oxide charge trapping only takes 30% and 22% at NBS time of 3000 and 7000 s, respectively. In addition, the increase of source/drain Schottky contact resistance (RSD) is the main reason for NBS-induced ON-current (ION) degradation.
引用
收藏
页码:396 / 398
页数:3
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