Amorphous Blue Phase III Exhibiting Submillisecond Response and Hysteresis-Free Switching at Room Temperature

We prepared a host liquid crystal consisting of a practical nematic liquid crystal mixture and a small amount of a newly designed T-shaped compound. The host liquid crystal doped with a chiral dopant possessing high helical twisting power produces room-temperature amorphous blue phase III (BPIII). An in-plane-switching cell containing the BPIII material exhibited high transmittance, submillisecond response, and hysteresis-free switching at room temperature. After the BPIII cell had been preserved for one month at 25 °C, the electro-optical switching was confirmed as identical to that of the virgin state.