[6p-PB4-1~12] 12.2 Characterization and Materials Physics

[6p-PB4-2] Effects of bias stress on OTFTs under light illumination

Takashi Ohta¹, 〇Yutaka Tokuda¹, Hiroo Anan², Tetsuya Katou², Masayuki Katayama² (1.Aichi Inst. of Tech., 2.DENSO CORP.)

Keywords:organic thin film transistors

We have already reported that the complete recovery of bias-stress-induced shift of V_th is caused by blue LED light illumination for organic thin film transistors (OTFTs) in the off-state. In contrast, in this work, we have shown more severe degradation by bias stress (on-state) under light illumination. A difference between the shift of V_th with and without illumination, that is, the shift of V_th induced by light illumination, is found to follow almost the exponential dependence on stress time. It is thought that the origin for the shift of V_th induced by light illumination in the on-state is different from that by thermal process without light illumination.