Optical description of mesostructured organic–inorganic halide perovskite solar cells

Anaya, Miguel and Lozano, Gabriel and Calvo, Mauricio E. and Zhang, Wei and Johnston, Michael B. and Snaith, Henry J. and Míguez, Hernán (2014) Optical description of mesostructured organic–inorganic halide perovskite solar cells. The Journal of Physical Chemistry Letters, 6 (1). pp. 48-53. ISSN 1948-7185

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Abstract

Herein we describe both theoretically and experimentally the optical response of solution-processed organic–inorganic halide perovskite solar cells based on mesostructured scaffolds. We develop a rigorous theoretical model using a method based on the propagation of waves in layered media, which allows visualizing the way in which light is spatially distributed across the device and serves to quantify the fraction of light absorbed by each medium comprising the cell. The discrimination between productive and parasitic absorption yields an accurate determination of the internal quantum efficiency. State-of-the-art devices integrating mesoporous scaffolds infiltrated with perovskite are manufactured and characterized to support the calculations. This combined experimental and theoretical analysis provides a rational understanding of the optical behavior of perovskite cells and can be beneficial for the judicious design of devices with improved performance. Notably, our model justifies the presence of a solid perovskite capping layer in all of the highest efficiency perovskite solar cells based on thinner mesoporous scaffolds.

Keywords:photovoltaics, optical design, perovskite, NotOAChecked
Subjects:F Physical Sciences > F360 Optical Physics
Divisions:College of Science > School of Chemistry
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ID Code:22671
Deposited On:19 Mar 2016 15:56

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