scholarly journals Charge carrier transport in poly(p-phenylenevinylene) light-emitting devices

1999 ◽  
Vol 1 (8) ◽  
pp. 1769-1776 ◽  
Author(s):  
S Forero ◽  
P H. Nguyen ◽  
W Brütting ◽  
M Schwoerer
Keyword(s):  
Charge Carrier ◽  
Carrier Transport ◽  
Charge Carrier Transport ◽  
Light Emitting ◽  
Light Emitting Devices

Time-of-Flight Measurement of Poly(3-Hexylthiophene) Thin Films

2008 ◽  
Vol 55-57 ◽  
pp. 673-676
Author(s):  
M. Sittishoktram ◽  
Udom Asawapirom ◽  
Tanakorn Osotchan
Keyword(s):  
Charge Carrier ◽  
Molecular Electronics ◽  
Carrier Transport ◽  
Field Effect Transistors ◽  
Time Of Flight ◽  
Light Condition ◽  
Device Fabrication ◽  
Aluminum Electrode ◽  
Light Emitting ◽  
Light Emitting Devices

Poly(3-hexylthiophene) (P3HT) is one of the most studied conjugated polymer for molecular electronics especially for organic field effect transistors (OFETs) and organic light-emitting devices (OLEDs). This is mainly due to the fact that P3HT provides excellent electrical properties and showed high carrier mobility. In this research we studied the photo generated charge carrier transport of P3HT film by the time-of-flight (TOF) method. For device fabrication, P3HT was dissolved in chloroform with concentration of 8 mg/ml then the solution was spun directly onto an ITO pattern coated on glass substrate. Then the aluminum electrode was prepared on film by thermal evaporation. In TOF measurement, the constant voltage was applied to electrode of sample and the film were photo-excited by irradiation of a short pulsed laser light (λ=650 nm). This caused charge separation within the film. The generated charge carrier was used to calculate the mobility of the film. The TOF mobility was determined as a function of applied voltage and light condition.

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