In-situ monitoring of the absorbance of perovskite films during the annealing process

Bas van Gorkom^a, Martijn M. Wienk^a, Bardo J Bruijnaers^a, René A. J. Janssen^a

^aEindhoven University of Technology (TU/e), PO Box 513, Eindhoven, 5600, Netherlands

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, Bardo J Bruijnaers, 448
Publication date: 5th February 2015

In order to get a better understanding of the annealing process of a perovskite film, a setup using an optic fiber was used to measure the absorbance of the perovskite film during the annealing process of up to several hours. Additionally, the films were characterized using SEM and XRD to get more insight into the formation process of the perovskite film. With this method we can see the initial lead iodide peak disappearing while the broad shoulder indicating the formation of the perovskite increases. After some time, the absolute absorbance value of the broad perovskite starts to decrease, indicating degradation of the perovskite material. This method can be used to determine the optimal annealing time and temperature(s) for the formation of a perovskite film for use in hybrid organic-inorganic solar cells.

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