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Enhanced Efficiency and Stability of Perovskite Solar Cells Through Nd‐Doping of Mesostructured TiO2 |
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| Authors: | Bart Roose Karl C. Gödel Sandeep Pathak Aditya Sadhanala Juan Pablo Correa Baena Bodo D. Wilts Henry J. Snaith Ulrich Wiesner Michael Grätzel Ullrich Steiner Antonio Abate |
| Affiliation: | 1. Adolphe Merkle Institute, Fribourg, Switzerland;2. Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK;3. Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, UK;4. Swiss Federal Institute of Technology (EPFL), Laboratory of Photonics and Interfaces, Lausanne, Switzerland;5. Materials Science and Engineering, Cornell University, Ithaca, NY, USA |
| Abstract: | Block‐copolymer templated chemical solution deposition is used to prepare mesoporous Nd‐doped TiO2 electrodes for perovskite‐based solar cells. X‐ray diffraction and photothermal deflection spectroscopy show substitutional incorporation into the TiO2 crystal lattice for low Nd concentration, and increasing interstitial doping for higher concentrations. Substitutional Nd‐doping leads to an increase in stability and performance of perovskite solar cells by eliminating defects and thus increasing electron transport and reducing charge recombination in the mesoporous TiO2. The optimized doping concentration of 0.3% Nd enables the preparation of perovskite solar cells with stabilized power conversion efficiency of >18%. |
| Keywords: | electrode materials hysteresis mixed halide perovskite perovskite solar cells TiO2 |