Supplementary material
High mobility organic field-effect transistor based on water-soluble
deoxyribonucleic acid via spray coating
Wei Shi, Shijiao Han, Wei Huang, Junsheng Yu
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information
(UESTC), Chengdu 610054, People’s Republic of China

Author to whom correspondence should be addressed. E-mail: jsyu@uestc.edu.cn. Tel: 86-28-83207157.
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FIG. S1. Output characteristics of OFETs processed (a) without DNA, (b) with DNA
in water, (c) with DNA-CTMA in ethanol, and with DNA in MW with the volume
ratios of (d) 9:1, (e) 7:1, (f) 5:1, and (g) 3:1, respectively.
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FIG. S2. (a), (b) Output and (c), (d) transfer characteristics of OFETs processed from
DNA in MW with a volume ratio of 9:1. (a), (c) Volatile time of DNA solvent was 24
hr. (b), (d) Volatile time of DNA solvent was 8 hr.
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FIG. S3. (a), (b) Output and (c), (d) transfer characteristics of OFETs processed from
DNA in MW with a volume ratio of 9:1. The OFET with (a) and (c) curves consists of
spray coated DNA buffer layer, and the device with (b) and (d) curves consists of spin
coated DNA buffer layer.
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TABLE S1. Electrical parameters of OFETs processed from DNA in MW with a
volume ratio of 9:1.
Fabrication
process
Volatile
time (hr)
IDS
(µA)
µ
(cm2/Vs)
OFET with DNA
in MW=9:1
spin coating
8
-4.06
0.047
OFET with DNA
in MW=9:1
spin coating
24
-4.86
0.052
OFET with DNA
in MW=9:1
spray coating
8
-6.87
0.058
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