Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD!: COMPARATIVE STUDY ON SOLID-STATE PHOTOELECTROCHEMICAL SOLAR ENERGY CONVERSION BASED ON P3OT AND P3OT: PCBM

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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2087

Title:	COMPARATIVE STUDY ON SOLID-STATE PHOTOELECTROCHEMICAL SOLAR ENERGY CONVERSION BASED ON P3OT AND P3OT: PCBM
Authors:	Kassa, Derib
Advisors:	Prof. Teketel Yohannes
Keywords:	SOLID-STATE PHOTOELECTROCHEMICAL P3OT PCBM P3OT
Copyright:	Jun-2010
Date Added:	2-May-2012
Publisher:	AAU
Abstract:	The photoelectrochemical properties of a solid-state photoelectrochemical cell (PEC) based on poly(3-octylthiophene), P3OT, and a blend of P3OT with phenyl-C61-butyric acid methyl ester, PCBM, an ion-conducting polymer electrolyte, amorphous poly(ethylene oxide), POMOE, complexed with iodine/triiodide redox couple has been constructed and studied. The current - voltage characteristics in the dark and under white light illumination, the dependence of the short - circuit (Isc) and the open - circuit voltage (Voc) of the two types of the devices have been compared. An open-circuit voltage of 344 mV and a short- circuit current of 0.47 μA cm-2 were obtained for the device of P3OT as a photoactive electrode and an open-circuit voltage of 294 mV and a short-circuit current of 4.271 μA cm-2 were obtained for the device of P3OT:PCBM at light intensity of 100 mW/cm2. The transient photocurrent and photovoltage, the photocurrent action spectra of the blend P3OT:PCBM for front and back side illuminations and an open-circuit voltage and short- circuit current dependence on light intensity have been studied. During illumination, a cathodic photocurrent was observed, indicating that the neutral poly(3-octylthiophene) behaves as a p-type semiconductor. IPCE% of 0.0682 % for front side illumination (ITO/PEDOT) and IPCE% of 0.0011 % for backside illumination (ITO/P3OT:PCBM) were obtained for the device ITO│P3OT:PCBM │POMOE:I3-/I-│ PEDOT│ITO.
URI:	http://hdl.handle.net/123456789/2087
Appears in:	Thesis - Chemistry

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