Effect of Gate Voltage in Organic Phototransistors Based on Polythiophene/Fullerene Bulk Heterojunction Nanolayers

Here we report the effect of gate voltage on the performance of organic phototransistors made using bulk heterojunction films of regioregular poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C 61 (PCBM). To understand the illumination effect, a monochromatic light (520 nm...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2010-01, Vol.519 (1), p.260-265
Main Authors: Nam, Sungho, Hwang, Hyemin, Kim, Hwajeong, Kim, Youngkyoo
Format: Article
Language:English
Subjects:
Electric currents
Electric potential
Electronics
Gate voltage
Gates
Heterojunctions
Illumination
Nanostructure
organic phototransistors
P3HT
PCBM
Phototransistors
Polymer chemistry
Polymer films
Polymer processing
responsivity
saturation
Transistors
Trends
Voltage
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Summary:Here we report the effect of gate voltage on the performance of organic phototransistors made using bulk heterojunction films of regioregular poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C 61 (PCBM). To understand the illumination effect, a monochromatic light (520 nm) corresponded to the maximum absorption of present P3HT:PCBM blend film was employed. Results showed that the present device followed a p-type field-effect transistor in the dark and under illumination though the saturation trend of output curves became weakened under illumination. The responsivity exhibited a two-stage trend as a function of gate voltage. The maximum responsivity reached 0.13 A/W under illumination of green light at 81μW/cm 2 .
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421401003603726