High-performance pentacene organic thin film Transistor (OTFT) with interface modification layer of polystyrene/chlorosilane composite material was developed. The AFM images show that the growth morphology of pentacene semiconductor film was affected by interface modification. The pentacene grains grown on modified SiO
2
substrates with dimensions in the range of 200~400 nm are larger than those grown on bare SiO
2
substrates which have sizes less than 150 nm. Large particle size can reduce intergranular interface so as to improve the electrical performance. The output and transfer curve
on/off current ratio
threshold voltage and field-effect mobility of the device were obtained by electric measurements. The transfer curve showed an on/off current ratio exceeding 10
6
with the off-current of about 10
-10
A. The device with interface modification has a maximum field-effect mobility of up to 1.23 cm
2
V
-1
s
-1
compared to the 0.0118 cm
2
V
-1
s
-1
of OTFT on bare SiO
2
substrate.
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references
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Related Author
QIU Long-zhen
LI Man-fei
ZHANG Jun
LIN Guang-qing
FENG Xiang
QIU Long-zhen
CHEN Meng-jie
CHEN Shi-qin
Related Institution
Key Lab of Special Display Technology, Ministry of Education, National Engineering Lab of Special Display Technology, National Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University
Key Lab of Special Display Technology, Ministry of Education, National Engineering Lab of Special Display Technology, National Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei 230009, China, E-mail:chenshiqin
@.
Research Center for Microelectronics Technology, Fujian University of Technology
National Engineering Lab of Special Display Technology, Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, Academy of Opto-Electronic Technology, Hefei University of Technology