The pressure-induced emission (PIE) behavior of halide perovskites has attracted widespread attention and has potential application in pressure sensing.H owever,h ighpressure reversibility largely inhibits practical applications. Here,w ed escribe the emission enhancement and non-doping control of the color temperature in two-dimensional perovskite (C 6 H 5 CH 2 CH 2 NH 3 ) 2 PbCl 4 ((PEA) 2 PbCl 4 )n anocrystals (NCs) through high-pressure processing.Aremarkable 5times PIE was achieved at am ild pressure of 0.4 GPa, whichw as highly associated with the enhanced radiative recombination of self-trapped excitons.Ofparticular importance is the retention of the 1.6 times emission of dense (PEA) 2 PbCl 4 NCs upon the complete release of pressure,a ccompanied by ac olor change from "warm" (4403 K) to "cold" white light with 14295 K. The irreversible pressure-induced structural amorphization, which facilitates the remaining local distortion of inorganic Pb-Cl octahedra with respect to the steric hindrance of organic PEA + cations,s hould be greatly responsible for the quenched highefficiency photoluminescence.
Developing single-component materials with bright white emission is highly demanded for energy saving nowadays. Self-trapped exciton (STE) emission has been recently regarded as a robust way to generate intrinsic white...
Lead halide two-dimensional (2D) nanomaterials (NCs) have attracted continued attention owing to their unique optoelectronic properties. However, the toxicity of lead largely prevents their commercialization. Therefore, environmentally friendly lead-free 2D...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.