Advances in physicochemical characterization of lead-free hybrid perovskite [NH₃(CH₂)₃NH₃]CuBr₄ crystals.

ABSTRACT: To support the development of eco-friendly hybrid perovskite solar cells, structural, thermal, and physical properties of the lead-free hybrid perovskite [NH₃(CH₂)₃NH₃]CuBr₄ were investigated using X-ray diffraction (XRD), differential scanning calorimetry, thermogravimetric analysis, and nuclear magnetic resonance spectroscopy. The crystal structure confirmed by XRD was monoclinic, and thermodynamic stability was observed at approximately 500 K without any phase transition. The large changes in the ¹H chemical shifts of NH₃ and those in C2 close to N are affected by N-H∙∙∙Br hydrogen bonds because the structural geometry of CuBr₄ changed significantly. The ¹H and ¹³C spin-lattice

SUBMITTER: Lim AR 

PROVIDER: S-EPMC9130295 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature