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Printed Flexible Organic Transistors with Tunable Aspect Ratios
Author(s) -
Sadeghi Mahsa,
Delparastan Peyman,
Pierre Adrien,
Arias Ana Claudia
Publication year - 2020
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201901207
Subject(s) - materials science , transistor , optoelectronics , fabrication , thin film transistor , inverter , aspect ratio (aeronautics) , electronic circuit , electrode , voltage , nanotechnology , electrical engineering , layer (electronics) , medicine , chemistry , alternative medicine , pathology , engineering
A fabrication technique that allows aspect ratio modulation in a large array of organic thin film transistors (OTFTs) is demonstrated. In this design, discrete interdigitated source and drain electrodes can be individually selected to create a range of aspect ratios ( W / L ). It is shown that by increasing the aspect ratio, the drain current is increased respectively. Arrays of OTFTs are fabricated with a combination of inkjet printing and surface energy patterned blade coating. OTFTs with optimized aspect ratios are interconnected to form electronic circuits with the desired performance. A fabricated enhancement‐load inverter with selected aspect ratios of 2000 µm/50 µm for the drive OTFT and 250 µm/50 µm for the load transistor show good switching performance with a dc gain of approximately 6 at supply voltage of −20 V.