Abstract
A novel lead free nano fibers of Cesium Titanium Bromide (CsTiBr3) perovskite is synthesized on commercial glass substrate by a two stage deposition method for the first time. Cesium Bromide thin film prepared by vacuum evaporation by resistive heating is the substrate for deposition of Titanium Bromide (TiBr4) vapor by an in-house deposition arrangement. The duration of deposition of TiBr4 vapor on CsBr thin film plays a key role on the structural, compositional and morphological properties of CsTiBr3. The mechanism behind the formation of nano fibers of CsTiBr3 from polygonal grains of CsBr is discussed in detail. The grain boundary grooving of CsBr polygonal grains influences the evolution and dimension of CsTiBr3 nano fibers. The nano fiber structure and lead free nature makes this novel perovskite a promising candidate for sensors, nanolasers and for future nanoelectronics.
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