Impact of Narrowing Density of States in Semiconducting Polymers on Performance of Organic Field-Effect Transistors.
Small
; 19(3): e2205570, 2023 01.
Article
in En
| MEDLINE
| ID: mdl-36408887
ABSTRACT
To improve the performance of organic field-effect transistors (OFETs) employing π-conjugated polymers, a basic understanding of the relationships between the material properties and device characteristics is crucial. Although the density of states (DOS) distribution is one of the essential material properties of semiconducting polymers, insights into how the DOS shape affects the mobility (µ), subthreshold swing (S), and contact resistance (RC ) in OFETs remain lacking. In this study, by combining sensitive DOS measurements and multilayered OFET structures, it is experimentally demonstrated that narrower DOS widths in the polymer channels lead to higher µ, smaller S, and lower RC . By contrast, variation of the DOS in the bulk layer does not affect the performance. These results demonstrate a direct relationship between the polymer properties and OFET performance and highlight the importance of controlling the DOS width in π-conjugated polymers.
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Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polymers
Language:
En
Journal:
Small
Journal subject:
ENGENHARIA BIOMEDICA
Year:
2023
Document type:
Article
Affiliation country: