Journal article

Publication year: 2016

Pages: 1505-1511

Journal: ChemPhysChem

Volume number: 17

Issue number: 10

ISSN: 1439-4235

eISSN: 1439-7641

DOI Link: https://doi.org/10.1002/cphc.201501168

Publisher: Wiley

Abstract: 
Thin films of the methylammonium lead halides CH3NH3Pb(I1-xBrx)(3) are prepared on fluorine-doped tin oxide substrates and exposed to humid air in the dark and under illumination. To characterize the stability of the materials, UV/Vis spectra are acquired at fixed intervals, accompanied by XRD, energy-dispersive X-ray spectroscopy, SEM, and confocal laser scanning microscopy. Different degradation mechanisms are observed depending on the environmental conditions. It is found that bromide can successfully suppress the transformation of the perovskite into the monohydrate, presumably owing to stronger hydrogen-bonding interactions with the organic cation. However, under illumination in humid air, rather rapid decomposition of the perovskites was still observed, which is due to phase segregation. The use of increased bromide content in methylammonium lead halide absorbers is discussed in terms of their application in perovskite solar cells.

Harvard Citation style: Ruess, R., Benfer, F., Böcher, F., Stumpp, M. and Schlettwein, D. (2016) Stabilization of Organic-Inorganic Perovskite Layers by Partial Substitution of Iodide by Bromide in Methylammonium Lead Iodide, ChemPhysChem, 17(10), pp. 1505-1511. https://doi.org/10.1002/cphc.201501168

APA Citation style: Ruess, R., Benfer, F., Böcher, F., Stumpp, M., & Schlettwein, D. (2016). Stabilization of Organic-Inorganic Perovskite Layers by Partial Substitution of Iodide by Bromide in Methylammonium Lead Iodide. ChemPhysChem. 17(10), 1505-1511. https://doi.org/10.1002/cphc.201501168