AAU-ETD AAU-ETD
 

Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
Faculty of Journalism and Communications >
Thesis - Journalism and Communication >

Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/188

Title: PHOTOVOLTAIC AND CHARGE CARRIER TRANSPORT PARAMETERS OF PTOPT
Authors: Bizuneh, G/michael
Advisors: Dr. Genene Tessema
Copyright: 2007
Date Added: 11-Oct-2007
Publisher: Addis Ababa University
Abstract: Low cost and easy processability of organic electronic and photonic devices, which is made from conductive polymer make them to be called a 'noble materials'. The rise of the idea of ”self healing” materials, especially polymeric materials[21], seems to make a remarkable change on the short lifetime of the device which is made of organic polymers. As a consequence, a rapid and denite analysis of different physical phenomenons in polymeric devices is expected from the theoretical as well as the the experimental physics. In this thesis, the photovoltaic and charge transport properties of the photovoltaic cells made from poly[3-(4-octylphenyl)-2,2'-bithiophene](PTOPT) was studied. A Schottky diode is prepared from a single layer polymer sandwiched in Al and PEDOT:PSS/ITO electrode. That is Al/PTOPT/PEDOT:PSS/ITO layered device structure. By applying a forward bias voltage, the current value for different voltage is measured and found that a rectifying contact is formed. Then, under AM 1.5 (one sun) illumination, the J-V data was collected and a power conversion efciency of 0.35% is recorded. Furthermore, dark current-voltage measurement is made by reversing the polarity of the electrodes. The symmetric nature of the J-V semi-logarithmic plot reveals that there is a unipolar charge injection in both sides of the electrodes. As the consequence, from the space charge limited region of the J-V data, we studied the electric eld dependence of the hole transport in the device and we determined the zero eld mobility ("$#&%('*),+)-/.102+435)76893:0,;<>=@? BA 􀀀) and the eld activation factor (CD%E'GFH+0I3J.K02+-L76MN3:0I;O7'P? A /67RQ).
Description: A THESIS PRESENTED TO THE SCHOOL OF GRADUATE STUDIES ADDIS ABABA UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in PHYSICS ADDIS ABABA, ETHIOPIA AUGUST 2007
URI: http://hdl.handle.net/123456789/188
Appears in:Thesis - Physics

Files in This Item:

File Description SizeFormat
Bizuneh GebreMichael.pdf1.69 MBAdobe PDFView/Open

Items in the AAUL Digital Library are protected by copyright, with all rights reserved, unless otherwise indicated.

 

  Last updated: May 2010. Copyright © Addis Ababa University Libraries - Feedback