New near-UV absorbing fluorophores with bis-azoles backbones were synthesized.
Dimethylamino imidazole-benzothiazole showed SS > 150 nm and Φf > 0.4 in CHCl3.
PMMA thin films displayed brilliant green emission and SS > 130 nm.
The high VIS transmittance and ηopt near 6 support the realization of colourless LSC.