Low bandgap alternating polyfluorene copolymers in plastic photodiodes and solar cells
2004 (English)In: Applied Physics A: Materials Science & Processing, ISSN 0947-8396, Vol. 79, no 1, 31-35 p.Article in journal (Refereed) Published
We report a comparative study of plastic photodiodes using four different copolymers of fluorene, with a variation of alkyl side chain length and chemical structure. Photodiode materials are formed by blending the polymers with a fullerene derivative and spincoating the blend solution. A photovoltage of 1 V is obtained in devices, where the anode is a doped polymer and the cathode is LiF/Al. Monochromatic quantum efficiencies are better than 40% over most of the absorption range, and under solar light AM 1.5 simulation, we reach energy efficiencies beyond 2%. The high fill factors obtained in some of the devices indicate that these are of interest for more elaborate optimisation. Reasons for the benign electrical transport are discussed. © Springer-Verlag 2004.
Place, publisher, year, edition, pages
2004. Vol. 79, no 1, 31-35 p.
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-45728DOI: 10.1007/s00339-003-2498-5OAI: oai:DiVA.org:liu-45728DiVA: diva2:266624