In this work, the time-dependent behaviors of dual-channel amorphous InGaZnO (a-IGZO) thin-film transistors (TFTs) under negative bias illumination stress (NBIS) are systematically discussed. The dual-channel comprised two different IGZO layers fabricated by tuning the oxygen flow during deposition. The presence of heterojunctions enhanced field-effect mobility by 1.5× owing to the confinement of carriers in buried channels because of an energy barrier. However, after long periods of NBIS stress, the degradation of a-IGZO TFTs resulted in the entrapment of photo-generated electron–hole pairs at interface defects. The conduction path migrated to the surface channel. Results from extracting the hysteresis window and utilizing capacitance–voltage measurements have indicated a channel migration phenomenon due to the entrapment of electrons and holes at the surface and buried channel interfaces.
Skip Nav Destination
Article navigation
20 March 2023
Research Article|
March 21 2023
Channel migration of dual channel a-InGaZnO TFTs under negative bias illumination stress
Special Collection:
Metal Oxide Thin-Film Electronics
Han-Yu Chang
;
Han-Yu Chang
(Conceptualization, Data curation, Formal analysis, Investigation, Validation, Writing – original draft)
1
Department of Electrical Engineering, National Sun Yat-sen University
, Kaohsiung 80424, Taiwan
Search for other works by this author on:
Ting-Chang Chang
;
Ting-Chang Chang
a)
(Conceptualization, Formal analysis, Resources, Supervision, Validation)
2
Department of Physics, the Center of Crystal Research, and also with College of Semiconductor and Advanced Technology Research, National Sun Yat-sen University
, Kaohsiung 80424, Taiwan
a)Author to whom correspondence should be addressed: tcchang3708@gmail.com
Search for other works by this author on:
Mao-Chou Tai
;
Mao-Chou Tai
(Conceptualization, Formal analysis, Investigation, Resources)
3
Department of Photonics, National Sun Yat-sen University
, Kaohsiung 80424, Taiwan
Search for other works by this author on:
Bo-Shen Huang;
Bo-Shen Huang
(Conceptualization, Investigation, Resources)
4
Department of Physics, National Sun Yat-sen University
, Kaohsiung 80424, Taiwan
Search for other works by this author on:
Kuan-Ju Zhou;
Kuan-Ju Zhou
(Resources, Writing – original draft)
4
Department of Physics, National Sun Yat-sen University
, Kaohsiung 80424, Taiwan
Search for other works by this author on:
Yu-Bo Wang
;
Yu-Bo Wang
(Investigation, Resources)
4
Department of Physics, National Sun Yat-sen University
, Kaohsiung 80424, Taiwan
Search for other works by this author on:
Hung-Ming Kuo
;
Hung-Ming Kuo
(Investigation, Resources)
4
Department of Physics, National Sun Yat-sen University
, Kaohsiung 80424, Taiwan
Search for other works by this author on:
Jen-Wei Huang
Jen-Wei Huang
(Formal analysis, Resources)
5
Department of Physics, R. O. C. Military Academy
, Kaohsiung 83059, Taiwan
Search for other works by this author on:
a)Author to whom correspondence should be addressed: tcchang3708@gmail.com
Note: This paper is part of the APL Special Collection on Metal Oxide Thin-Film Electronics.
Appl. Phys. Lett. 122, 123504 (2023)
Article history
Received:
November 18 2022
Accepted:
March 09 2023
Citation
Han-Yu Chang, Ting-Chang Chang, Mao-Chou Tai, Bo-Shen Huang, Kuan-Ju Zhou, Yu-Bo Wang, Hung-Ming Kuo, Jen-Wei Huang; Channel migration of dual channel a-InGaZnO TFTs under negative bias illumination stress. Appl. Phys. Lett. 20 March 2023; 122 (12): 123504. https://doi.org/10.1063/5.0135302
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00