Proceedings of nanoGe Fall Meeting 2018 (NFM18)
Publication date: 6th July 2018
Hybrid perovskite single crystals have attracted great attention due to their high absorption coefficients, low trap density, and long electron-hole diffusion lengths. Based on the previous studies, it is well known that using triple cation or incorporation of inorganic cation such as cesium (Cs) can improve material stability with better device performance. Rubidium (Rb) is another alternative inorganic cation, which has slightly smaller atomic size than Cs. However, so far very few studies have reported on Rb-based perovskite thin films, not single crystals. Here, we first synthesized Rb incorporated multiple cation perovskite single crystals by inverse temperature crystallization method. X-ray diffraction and UV-Vis absorption spectroscopy were carried out to investigate structural and optical properties of Rb(MAFA) perovskite single crystals. Time of flight secondary ion mass spectrometry (TOF-SIMS) was also performed to detect the addition of Rb inside perovskite single crystals, and finally, electrical properties were also characterized for future applications.
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