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Samah Akel

As seen in: Wiley Online Library, Physical Review B
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Articles by Samah Akel

A Universal Strategy of Perovskite Ink ‐ Substrate Interaction to Overcome the Poor Wettability of a Self‐Assembled Monolayer for Reproducible Perovskite Solar Cells

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By Ashish Kulkarni, Ranjini Sarkar, Materials Theory, Samah Akel
| Wiley Online Library Verified
1 Introduction The interaction between the perovskite ink and the underlying charge transport layer (CTL) coated substrate strongly determines 1) the uniformity and crystallization of lead halide perovskite thin-films, 2) their charge transport properties,[1-5] 3) radiative and non-radiative recombination processes,[3, 6, 7] 4) reproducibility in the device performance over a large area and 5) the stability.[8-10] The solvents that are used for perovskite ink processing, such as N-N′-dimethyl...
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Relevance of Long Diffusion Lengths for Efficient Halide Perovskite Solar Cells

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By Samah Akel, Forschungszentrum Jülich, Ashish Kulkarni, Uwe Rau
| Physical Review B
Abstract Diffusion lengths are abundantly mentioned as a key enabler of high performance in lead-halide perovskite solar cells based on the implicit assumption that diffusion lengths are directly connected to efficient collection of charge carriers. While long diffusion lengths are indeed an important factor for highly efficient solar cells, they are a poor descriptor of efficient collection in the presence of undoped and low-mobility transport layers.
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