Halide perovskites have been extensively studied in last decade partially due to the unprecedentedly rapid increase of power conversion efficiency of perovskite based solar cells.In addition to the solar cells, perovskite based optoelectronic devices such as photodetectors and light emitting devices have also been demonstrated with impressive performance, benefited from the large absorption coefficient, tunable band gap, defect tolerance and long carrier diffusion length.Although significant progress has been made in these fields, a few challenges including long-term stability and toxicity of lead greatly limit their commercialization.Great effort has been put into those fields to address the long-last issues from aspects of fundamental understanding of their photophysics, material engineering and performance optimization.This special issue on “Halide perovskites: from materials to optoelectronic devices” including one comment, four reviews, and five original research articles covers all topics mentioned.