Distinct green electroluminescence from lead-free CsCuBr2 halide micro-crosses

Low-dimensional, lead-free, and cuprous-based halide compounds of Cs3Cu2Br5 micro-rods and CsCuBr2 micro-crosses (MCs) were synthesized via a simple solution method. The CsCuBr2 MCs were quite stable in air. Distinct green electroluminescence at 527 nm originating from CsCuBr2 MCs was observed at a low driving voltage of less than 3 V.