Blue-light
hazard in display will become a more serious problem
because the wearable period is coming. Visual injury caused by the
short wavelength is always the biggest challenge in red/green/blue
ones. Therefore, the 470–475 nm is the most needed wavelength
range to balance the visual injury and display effects. In addition,
the combination of suitable wavelength, flexibility, and optic–electric
coexistence has triggered a huge challenge in the wearable period
to explore new blue-light materials. Under this epochal premise, lead-free
blue light was introduced to form a dual photoelectric dielectric/blue-light
switching flexible film/bulk crystal [Habf]2[ZnCl4]·2H2O (1) (Habf = p-ammonium benzene formamide), which will be a new breakthrough in
photoelectric wearable devices. The coexistence of dielectric relaxation
and high quantum yield in the most ideal emission wavelength facilitates
the exploration of blue-light materials with low hazard, optical–electric
response, and wearable characteristics in displays, multichannel controller,
and new scenario requirements for optical–electric devices.