In-situ study of Perovskite crystal growth during spin coating under grazing incidence wide angle x-ray scattering (GIWAXS)

Aram Amassian^a, Maged Abdelsamie^a, Taesoo Kim^a, Rahim Munir^a, Detlef-M. Smilgies^b, Ruipeng Li^b

^aKing Abdullah University of Science and Technology (KAUST) - Saudi Arabia, 4700 King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia

^bCornell University, Cornell High Energy Synchrotron Source (CHESS), Wilson Laboratory Ithaca, NY 14853, USA, Ithaca, United States

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Rahim Munir, 181
Publication date: 5th February 2015

Solar energy is one of the reliable energy generation sources for the future. Power conversion efficiencies of solar cells have been improving over a vast period of time. Cost remains a major drawback for solar technology to touch masses. Lead halide perovskite solar cells introduced a solution with high power conversion efficiencies and low cost of processing. Although, perovskite solar cells have achieved high efficiencies in few years, still the basic understanding of formation of perovskite active layer material lacks behind. To cater the need of in-depth understanding of the processing parameters to form the active layer we have studied in-situ spin coating of perovskite have been studied under grazing incidence wide angle x-ray scattering (GIWAXS) at Cornell High Energy Synchrotron Source (CHESS). In this talk, I will show how spinning time effects the perovskite film nucleation and growth. All most commonly used lead halides (chloride, bromide and iodide) have been studied to form a comprehensive idea about each system. We have observed different regimes during the spinning of perovskite film formation and in each regime, we have halted the spinning process and annealed the films for crystallization. This in-situ study of nucleation and growth during spinning makes a positive impact towards improved morphology and device performance.

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