Light-up the white light emission in microscale with a superior deep-blue AIE fiber as wave-guiding source

The development of high-performance organic blue light-emitting emitters is in urgent to act as an excitation source to contribute the white light generation. On the other hand, the investigation on optical waveguides have been received increasing attentions because they can manipulate the light propagation accurately in the microscale to boost the optoelectronic and energy conversion applications. In this work, we facilely prepared a deep-blue aggregation-induced emission (AIE) dye, namely TPP-4OMe, which shows high luminescent efficiency, narrow emission band and good stability in the aggregate state. TPP-4OMe can be fabricated as deep-blue AIE microfibers readily with definite morphology and composition. Based on the AIE microfibers, the active waveguide to transmit deep-blue emission signals can be achieved with a very low optical loss coefficient (alpha) of 6.7 x 10-3 dB mu m-1. Meanwhile, the full-visible broadband low-loss passive waveguide can be well performed with these AIE microfibers, which has never been observed in the pure organic crystals. More interestingly, the excellent properties of AIE microfibers enable them to act as a wave-guiding excitation source, resulting in a distinct and pure white light emission. The present work not only provides excellent blue light-emitting materials but also bridges the waveguide to realize the efficient white light emission to accelerate the practical applications. Based on an excellent deep-blue aggregation-induced emission (AIE) dye of TPP-4OMe, the AIE microfibers can be readily fabricated which show an active waveguide with a very low optical loss coefficient as well as a rare full-visible broadband passive waveguide. Moreover, the deep-blue AIE microfibers can act as a wave-guiding excitation source to result in various emissions and even white light emission.image