Organic polymorph-based alloys for continuous regulation of emission colors

Summary

The luminescence of organic semiconductor materials is the key function for their lighting and display applications. Continuous regulation of emission colors based on one organic molecule system is still a challenge because of their individual emission band. Here we present a novel strategy for modulation of crystal nuclei and growth rates for different crystal phases, which contributes to fine synthesis of the organic polymorph-based alloy microwires that successfully exhibit continuous regulation of emission colors from blue to green. High supersaturation facilitates formation of α-phase microwires with blue emission (CIE [0.17, 0.23]), and low supersaturation is beneficial for self-assembly of β-phase microwires with green emission (CIE [0.29, 0.58]). Impressively, these organic polymorph-based alloy microwires were applied successfully to multicolor display and optical waveguides, which offer potential applications as continuous multicolor emitters for advanced photonics.