Suppressing bias stress degradation in high performance solution processed organic transistors operating in air

Solution processed organic field effect transistors can become ubiquitous in flexible optoelectronics. While progress in material and device design has been astonishing, low environmental and operational stabilities remain longstanding problems obstructing their immediate deployment in real world ap...

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Bibliographic Details
Published in:Nature communications 2021-04, Vol.12 (1), p.2352-10, Article 2352
Main Authors: Iqbal, Hamna F., Ai, Qianxiang, Thorley, Karl J., Chen, Hu, McCulloch, Iain, Risko, Chad, Anthony, John E., Jurchescu, Oana D.
Format: Article
Language:English
Subjects:
119/118
639/166/987
639/301/1005/1007
Bias
Blocking
Fabrication
Field effect transistors
Humanities and Social Sciences
multidisciplinary
Optoelectronics
Performance degradation
Science
Science (multidisciplinary)
Semiconductor devices
Stress
Threshold voltage
Transistors
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Summary:Solution processed organic field effect transistors can become ubiquitous in flexible optoelectronics. While progress in material and device design has been astonishing, low environmental and operational stabilities remain longstanding problems obstructing their immediate deployment in real world applications. Here, we introduce a strategy to identify the most probable and severe degradation pathways in organic transistors and then implement a method to eliminate the main sources of instabilities. Real time monitoring of the energetic distribution and transformation of electronic trap states during device operation, in conjunction with simulations, revealed the nature of traps responsible for performance degradation. With this information, we designed the most efficient encapsulation strategy for each device type, which resulted in fabrication of high performance, environmentally and operationally stable small molecule and polymeric transistors with consistent mobility and unparalleled threshold voltage shifts as low as 0.1 V under the application of high bias stress in air. Electrical instability of organic field-effect transistors (OFETs) during operation remains a challenge that limits the device’s real-world technological viability. Here, the authors report a method for diagnosing and suppressing bias stress in solution-processed OFETs operated in air.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-021-22683-2