Possible Charge-Transfer-Induced Conductivity Enhancement in TiO Microtubes Decorated with Perovskite CsPbBr Nanocrystals.

Halide perovskite CsPbBr quantum dots (QDs) were synthesized via supersaturated recrystallization process and deposited on the surface of TiO microtubes forming local nano-heterostructures. Structural, morphological, and optical characterizations confirm the formation of heterostructures comprised of TiO microtube decorated with green-emitting CsPbBr nanocrystals. Optical characterizations reveal the presence of two band gap energies corresponding to CsPbBr (2.