Ultrafast Charge Delocalization Dynamics of Ambient Stable CsPbBr Nanocrystals Encapsulated in Polystyrene Fiber.

CsPbBr nanocrystals (NCs) encapsulated in a transparent polystyrene (PS) fiber matrix (CsPbBr @PS) have been synthesized to protect the NCs. The ultrafast charge delocalization dynamics of the embedded NCs have been demonstrated, and the results are compared with the pristine CsPbBr in toluene. The electrospinning method was employed for the preparation of CsPbBr @PS fibers by using a polystyrene solution doped with pre-synthesized CsPbBr and characterized by XRD, HRTEM, and X-ray photoelectron spectroscopy (XPS).

Tuning the optical properties of poly(o-phenylenediamine-co-pyrrole) via template mediated copolymerization.

Tailoring of conjugated monomers via copolymerization is a facile method to obtain tunable spectral, morphological and optical properties. To investigate the effect of copolymerization of pyrrole with o-phenylenediamine on the optoelectronic properties of the synthesized copolymers, the present work reports the synthesis of copolymers of o-phenylenediamine with pyrrole with varying mol ratios via chemical polymerization in methylene blue (MB) medium. Copolymerization was confirmed by Fourier transform infrared spectroscopy and ultraviolet-visible studies.