title: Quantum-confined ZnO nanoshell photoanodes for mesoscopic solar cells.
abstract: We present a photoanode for dye-sensitized solar cell (DSC) based on ZnO nanoshell deposited by atomic layer deposition at 150 °C on a mesoporous insulating template. An ultrathin layer of ZnO between 3 and 6 nm, which exhibits quantum confinement effect, is found to be sufficient to transport the photogenerated electrons to the external contacts and exhibits near-unity collection efficiency. A 6 nm ZnO nanoshell on a 2.5 μm mesoporous nanoparticle Al2O3 template yields photovoltaic power conversion efficiency (PCE) of 4.2% in liquid DSC. Perovskite absorber (CH3NH3PbI3) based solid state solar cells made with similar ZnO nanostructures lead to a high PCE of 7%.
authors: Laboratory of Photonics and Interfaces, Swiss Federal Institute of Technology (EPFL) , Station 6, Lausanne CH 1015, Switzerland.
authors: Aravind Kumar
authors: AK
authors: Chandiran
authors: Mojtaba
authors: M
authors: Abdi-Jalebi
authors: Aswani
authors: A
authors: Yella
authors: M Ibrahim
authors: MI
authors: Dar
authors: Chenyi
authors: C
authors: Yi
authors: Srinivasrao A
authors: SA
authors: Shivashankar
authors: Mohammad K
authors: MK
authors: Nazeeruddin
authors: Michael
authors: M
authors: Grätzel