title: Polystyrene templated porous titania wells for quantum dot heterojunction solar cells.
abstract: Polystyrene spheres are used to template TiO2 with a single layer of 300 nm wells which are infilled with PbS quantum dots to form a heterojunction solar cell. The porous well device has an efficiency of 5.7% while the simple planar junction is limited to 3.2%. Using a combination of optical absorption and photocurrent transient decay measurement we determined that the performance enhancement comes from a combination of enhanced optical absorption and increased carrier lifetime.
authors: Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, United Kingdom.
authors: Cheng
authors: C
authors: Cheng
authors: Michael M
authors: MM
authors: Lee
authors: Nakita K
authors: NK
authors: Noel
authors: Gareth M
authors: GM
authors: Hughes
authors: James M
authors: JM
authors: Ball
authors: Hazel E
authors: HE
authors: Assender
authors: Henry J
authors: HJ
authors: Snaith
authors: Andrew A R
authors: AA
authors: Watt