Halide Perovskite Lateral Heterostructures for Energy Routing Based Photonic Applications

摘要

Semiconductor heterostructures hold the promise for developing novel integrated devices with on-demand photonic and optoelectronic properties. Herein, the perovskite lateral heterostructures in forms of microplates and microwires are fabricated by precise control of two-step atmospheric pressure chemical vapor deposition course and the unique optical properties are demonstrated for the first time. The comprehensive spectroscopic and elemental mapping characterizations reveal the core-shell-like configuration of the individual heterostructure, which features the fascinating energy routing nature. Taking advantage of the effective photon recycling and the energy transfer processes, the record-low threshold (approximate to 3.5 mu J cm(-2)) lasing and the indirect pumping induced lasers from the single micro-heterostructure are demonstrated. Moreover, the distinctive optical waveguides with propagation length independent output spectra from the microwire heterostructure are realized. These findings represent a significant advance in developing novel and functional optoelectronic devices by engineering the perovskite heterostructure.