Improved efficiency of photovoltaics based on CdSe nanorods and poly(3-hexylthiophene) nanofibers.
We present photovoltaic devices based on a blend of the conjugated polymer poly(3-hexylthiophene) (P3HT) with cadmium selenide nanorods, where the solvent for film deposition has been carefully chosen to optimize the film morphology. Using 1,2,4-trichlorobenzene (TCB), which has a high boiling point, as solvent for P3HT it is possible to obtain a fibrilar morphology, providing extended pathways for hole transport. Blend devices fabricated using this solvent gave solar power conversion efficiencies of 2.6%. This indicates that efficient transport of electrons and holes is achieved in these films, allowing them to operate effectively at solar illumination intensities.
Sun
Baoquan
B
Cavendish Laboratory, Madingley Road, Cambridge, UK CB3 0HE.
Greenham
Neil C
NC
D019187:Cadmium Compounds / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D010777:Photochemistry / Q000295:instrumentation / Q000379:methods; D018036:Selenium Compounds / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*
D019187:Cadmium Compounds; D018036:Selenium Compounds; D013876:Thiophenes; C507295:poly(3-hexylthiophene); C058667:cadmium selenide