首页|Temperature dependent phase transitions and their relation to isosbestic point formation. Case study of C(NH2)(3)PbI3
Temperature dependent phase transitions and their relation to isosbestic point formation. Case study of C(NH2)(3)PbI3
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NSTL
Elsevier
Besides the vast research regarding the hybrid organic-inorganic perovskite (HOIP) materials used in the solar cell production, their properties are still not fully uncovered. In this paper, detailed investigation on the phase transitions in guanidinium lead iodide (GAPbI(3)) using vibrational spectroscopy techniques (IR and Raman) are presented. In addition to the well-known three phases of GAPbI(3) (denoted as I, II and III) another one existing in the temperature range from 48 degrees C to 160 degrees C is characterized. The thorough inspection of the vibrational spectra revealed some interesting changes occurring in the low temperature region (from -90 to -62 degrees C) that suggest presence of a new phase. Finally, a redefinition of the phase nomenclature according to the recommendations given by the IUCr is proposed. (C) 2021 Elsevier B.V. All rights reserved.
Phase transitionIsosbestic pointGuanidinium lead iodideIR and Raman spectraMECHANOCHEMICAL SYNTHESISVIBRATIONAL PROPERTIESRAMAN-SPECTRAGUANIDINIUMCATION
Bukleski, M.、Dimitrovska-Lazova, S.、Aleksovska, S.
NSTL
Elsevier
