Charge photogeneration in hybrid solar cells: a comparison between quantum dots and in situ grown CdS.
We demonstrate that blend films containing poly(3-hexylthiophene-2,5-diyl) and in situ grown CdS display a greater yield of photogenerated charges than a blend containing an equivalent amount of pre-synthesised CdS quantum dots. Moreover, we show that the greater charge yield in the in situ grown films leads to an improvement in device efficiency. The present findings also appear to suggest that charge photogeneration at the CdS/polymer heterojunction is facilitated by the formation of nanoparticle networks as a result of CdS aggregation.
Centre for Plastic Electronics and Department of Chemistry, Imperial College London, SW7 2AZ.
Luke X
LX
Reynolds
Thierry
T
Lutz
Simon
S
Dowland
Andrew
A
MacLachlan
Simon
S
King
Saif A
SA
Haque
D019187:Cadmium Compounds / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D019301:Oleic Acid / Q000737:chemistry; D045663:Quantum Dots; D012993:Solar Energy; D013440:Sulfides / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry
D019187:Cadmium Compounds; D013440:Sulfides; D013876:Thiophenes; C507295:poly(3-hexylthiophene); C034939:cadmium sulfide; D019301:Oleic Acid