Nature Communications (Jan 2019)
Photoinduced, reversible phase transitions in all-inorganic perovskite nanocrystals
Abstract
Lead trihalide perovskites are notable for their excellent optoelectronic properties and uncommon phase behavior. Here, Kirschner et al. show that cesium lead bromide nanocrystals experience a reversible orthorhombic-to-cubic phase transition at moderate excitation fluences and become amorphous at higher fluences.