STRUCTURAL AND OPTOELECTRON PROPERTIES OF HYBRID PEROVSKITE CRYSTALS
O. I. Semenova1, D. S. Abramkin1, I. A. Derebezov1, A. N. Shmakov2, A. V. Gaisler1, V. A. Gaisler1
1Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: гибридные перовскиты, структурный фазовый переход, фотолюминесценция, hybrid perovskites, structural phase transition, photoluminescence
Abstract
The structure and photoluminescence of synthesized perovskite crystals CH3NH3PbI3 (lead triiodide methylammonium) are investigated in a wide temperature range. As temperature rises to 130-140 K, there is a transition from a orthorhombic to tetragonal crystal lattice with a change in the band gap. An increase in the stationary photoluminescence intensity at room temperature under the influence of exciting radiation is revealed. A model explaining the observed growth of photoluminescence is proposed.
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