title: Charge Generation Dynamics in CdS:P3HT Blends for Hybrid Solar Cells.
abstract: Development of design rules for hybrid inorganic-organic solar cells through understanding charge generation and recombination dynamics is an important pathway for the improvement of solar cell conversion efficiencies. In this Letter, we study the dynamics of charge generation in CdS:polymer blends by transient absorption spectroscopy. We show that charge generation following excitation of the inorganic component is highly efficient and can occur up to a few nanoseconds after excitation, allowing for diffusion of charges within the inorganic component to an interface. In contrast, charge generation following excitation of the organic component occurs on subpicosecond time scales but suffers from two loss processes, incomplete exciton dissociation and geminate recombination.
authors: Department of Chemistry, Imperial College London, South Kensington Campus, Exhibition Road, South Kensington, United Kingdom.
authors: Ute B
authors: UB
authors: Cappel
authors: Department of Chemistry, Imperial College London, South Kensington Campus, Exhibition Road, South Kensington, United Kingdom.
authors: Simon A
authors: SA
authors: Dowland
authors: Department of Chemistry, Imperial College London, South Kensington Campus, Exhibition Road, South Kensington, United Kingdom.
authors: Luke X
authors: LX
authors: Reynolds
authors: Department of Chemistry, Imperial College London, South Kensington Campus, Exhibition Road, South Kensington, United Kingdom.
authors: Stoichko
authors: S
authors: Dimitrov
authors: Department of Chemistry, Imperial College London, South Kensington Campus, Exhibition Road, South Kensington, United Kingdom.
authors: Saif A
authors: SA
authors: Haque
keywords: cadmium xanthate; electron transfer; hole transfer; photovoltaics; transient absorption spectroscopy