One-step synthesis of BaTiO₃/CaTiO₃ core-shell nanocubes by hydrothermal reaction

Abstract

Novel cube-shaped nanocrystals of BaTiO 3 (BT) surrounded by CaTiO 3 (CT) that can be used for piezo-driven energy harvesters were synthesized using a one-step hydrothermal reaction with surfactant and additives at 250°C for 24 h. The size distribution of the nanocubes (NCs) was narrow, with an approximate average size of 50 ~ 60 nm. The nanocubes had a core-shell configuration, such that the Pbnm structured CT shell was grown on a P4mm structured BT core by sharing corresponding [001] directions. STEM-EDX and EELS indicated that Ba ions did not diffuse into the CT shell region. Piezoelectric hysteresis loops of BT/CT NCs were obtained by piezoresponse force microscopy.

Improvement in the performance and efficiency on self-deficient CaTiO3: Towards sustainable and affordable new-generation solar cells

“…Perovskite materials have attracted a lot of attention these days because of their octahedral nanostructures and recent developments in synthesizing layered heterostructures. The lack of device stability of pure perovskite-based cells is now holding them back and limiting their usefulness [6,8,9]. Studies on the stability and rate of performance of the purest form of perovskite-based solar cells reveal that such devices are less stable and have lower rates of performance, as a result of which their commercial applications are limited.…”