In situ growth of aligned CsPbBr3 nanorods in polymer fibers with tailored aspect ratios

The growth of one-dimensional nanostructured semiconductors with aligned configuration and tunable aspect rations is recognized as one of the critically important and fundamental issues, for exploring polarized light sources as the back lights in liquid crystal display (LCD) with desired optical performance. In the present work, aiming to endow the perovskite nanocrystals (NCs) with enhanced stability and polarized optical performance, we reported the in situ growth of aligned CsPbBr3 nanorods in polystyrene (PS) fibers, which was based on a facile one-step electrospinning technique. It was found that the electrospinning temperatures could have a profound effect on the growth of CsPbBr3 nanorods with various aspect ratios (ARs), enabling their growth in a tailored manner. The mechanism on the tunable growth of aligned CsPbBr3 nanorods in PS fibers was proposed.