101. Influence of doped charge transport layers on efficient perovskite solar cells
- Author
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Pablo P. Boix, Jorge Ávila, Steve Albrecht, Henk J. Bolink, Michele Sessolo, and Lidón Gil-Escrig
- Subjects
Solar cells of the next generation ,Materials science ,Energy Engineering and Power Technology ,02 engineering and technology ,Electron ,010402 general chemistry ,7. Clean energy ,01 natural sciences ,law.invention ,law ,Solar cell ,Absorption (electromagnetic radiation) ,Perovskite (structure) ,chemistry.chemical_classification ,Renewable Energy, Sustainability and the Environment ,business.industry ,Doping ,Electron acceptor ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Fuel Technology ,chemistry ,Electrode ,Optoelectronics ,0210 nano-technology ,business ,Current density - Abstract
Planar vacuum deposited p–i–n methyl ammonium lead tri-iodide perovskite solar cells are prepared with different electron and hole transporting layers, either doped or undoped. The effect of these layers on the solar cells performance (efficiency and stability) is studied. The main benefit of using doped layers lies in the formation of barrier free charge extraction contacts to the electrodes. However, this comes at the cost of increased residual absorption (reducing the current density and efficiency of the cells) and a decreased stability. A generic solar cell structure using undoped charge extraction layers is presented, containing a thin layer of a strong electron acceptor in between the transparent electrode and the hole transport layer, that leads to efficiencies of 18% and a significant (>5 times) improvement of the stability.
- Published
- 2018