Microsphere assembly of boron-doped Rutile TiO2 nanotubes with enhanced photoelectric performance

Abstract

The boron-doped TiO 2 nanotubes assembled microspheres are fabricated for the first time based on our previously proposed anisotropic corrosion mechanism. The obtained samples are screen-printed onto the surface of FTO glass for the application in dye sensitized solar cell (DSSC). The XRD patterns demonstrate the main phase is rutile and the incorporated boron exists at interstitial sites of TiO 2 lattice. The Tafel curves indicate that the flat-band potential of boron doped TiO 2 shifts positively, while the band gap shown in the UV-visible spectra remains unchanged. The electrochemical impedance spectroscopy is employed to investigate the charge transfer properties of DSSCs which shows boron-doped TiO 2 has enhanced electron conductivity and extended electron lifetime. Both advantages are of great importance for the boron-doped photovoltaic device to achieve the favorable photoelectric conversion efficiency of 2.98 % under AM 1.5 illumination of 100 mW cm -2 , which is 51 % higher than that of the un-doped one.

Synthesis of Novel Electrospun Composite Nano Powders of the Quaternary Ti-Al-O-B System

“…This phenomenon can be interpreted by Eq. 12 [46]. The unbroken TiO2 NPs might have remained as spherical particles inside the powders.…”

Layer-by-layer deposition of TiO2–ZrO2 electrode sensitized with Pandan leaves: natural dye-sensitized solar cell

“…Doping in TiO 2 can modified optical and electrical properties leads to increase the performance by providing more active sites on the surface that can play a significant role for adsorption of dye molecules, improvement in light absorption, and also enhance the electron collection in the conduction band [6,7]. On the contrary, one can enhance the performance of DSSC using multi-layered or composite photoanodes [8,9].…”