[DMEDA]PbCl4: One-dimensional Organic Lead Halide Perovskite with Efficient Yellow Emission
In recent years, low-dimensional organic-inorganic hybrid lead halide perovskites have been explored as photoluminescent (PL) materials with high photoluminescence quantum efficiencies and tunable band structures arising from the structural regulating functions of organic cations. Herein, by using a simple solution reaction, we prepared one new type of one-dimensional (1D) hybrid lead halide, namely as, [DMEDA]PbCl4 (DMEDA = N, N'-dimethylethylenediamine). The compound contains 1D edge sharing octahedral lead chloride [PbCl4]2- anionic chains, which are surrounded and separated by the organic cations of [DMEDA]2+. This 1D structure enables the formation of self-trapped excited states that give bright yellow emissions with photoluminescence quantum efficiency (PLQE) of approximately 4.81 %. The white light emitting device can also be easily fabricated by coating the sample of [DMEDA]PbCl4 on a blue light chip. The PL stability and nature are also investigated by using various experiments. This work provides a new type of structural models to probe into the PL property and understand the structure-property relationship of low-dimensional lead halide perovskites.