Abstract
The photophysical properties of thin films of poly[2-methoxy-5-(2′-ethyl-hexyloxy), para-phenylene vinylene] (MEH-PPV) on TiO 2 substrates have been investigated. Evidence for dissociation of excitons at the MEH-PPV/TiO 2 interface and electron injection into the conduction band of TiO 2 has been found from current/voltage characteristics. The open circuit voltage is to 0.92 V for these cells and an energy conversion efficiency of 0.15% is found for white light. Capacitance measurements follow the Mott–Schottky relationship and reveal an acceptor density of N A≈9×10 17 cm −3 for the polymer layers. From analysis of the luminescence as a function of the film thickness, an exciton diffusion length of 20±3 nm for MEH-PPV is derived.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
