Publication date: 1st July 2014
Influence of the organic cation on the structure of hybrid organic inorganic perovskites
Enrico Greul, Pablo Docampo, Thomas Bein*
e-mail: tbein@lmu.de
Hybrid organic perovskite photovoltaics have recently become the focus of a large number of research groups because of the high device efficiencies (>15 %) which can be achieved with this type of material.The high abundance of its components, simple processability, high extinction coefficients and extremely long lifetimes of photoexcited charge carriers make this technology a strong candidate for applications in large area photovoltaics. Nevertheless, the fundamental properties of the materials are still under investigation, particularly the exact role of the individual components of the hybrid perovskite structure and their interactions with each other are not well known. Here, we study a range of organic cations that were infiltrated into the lead iodide network by different preparation techniques and their influence on the resulting hybrid halide perovskite. The properties of the resulting materials were characterized by powder X-ray diffractometry (PXRD), UV-Vis spectroscopy and photoluminescence (PL) spectroscopy.
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