Enhanced conductivity of anatase TiO ₂ nanowires by La and Co co‐doping

Abstract

In this work, the conductivity of anatase titanium dioxide (TiO 2) nanowires was enhanced by lanthanum (La) and cobalt (Co) co-doping method. The nanowires were synthesised via a facile solvothermal process. The diameter of as-synthesised nanowires is about 300 nm and length more than 20 μm. The electrical properties were studied based on single nanowire field-effect transistor; the anatase TiO 2 nanowires exhibit n-type conductivity with mobility of 2.18 cm 2 V −1 S −1 and carrier concentration of 1.95 × 10 18 cm −3. Doping of rare earth element La and transition element Co can not only reduce bandgap, but also reduce electron-hole recombination and improve carrier concentration. The distinct electrical properties of doped nanowires will open new opportunities for the application of anatase TiO 2 semiconductor materials in nanoelectronics devices.

Host/Guest Nanostructured Photoanodes Integrated with Targeted Enhancement Strategies for Photoelectrochemical Water Splitting

“…Element doping is an effective strategy to improve the electrical conductivity of host scaffolds, which can further enhance its charge collection ability. [121][122][123] The more efficient collection of the photogenerated carriers in the photoanodes can be indicated [79] Copyright 2014, Elsevier Ltd. ZnO/Fe 2 O 3 core/shell NWs: b) TEM image; c) LSV plots. b,c) Reproduced with permission.…”

Sc/C codoping effect on the electronic and optical properties of the TiO2 (101) surface: a first-principles study

“…Recent studies have shown that transition metal (TM) [15][16][17][18][19] and non-metal atoms doping [20][21][22][23] are a feasible and efficient way to enhance the photocatalytic performance of TiO 2 . Nevertheless, the TM doping is deemed unstable and can introduce localized impurity states, which increase the recombination rate of photo-generated electron-hole pairs.…”

Photocatalytic potentiality of a two‐dimensional Fe‐doped C 2 N material in visible light

“…In the 19th century, semiconductor materials [5, 6] have played an extremely important role in the development of photocatalytic technology. Among them, TiO 2 [7, 8] is a representative semiconductor material. It has been widely used in photocatalysis technology because of the high chemical stability, non‐toxicity and strong photo‐oxidative degradation on the OCs.…”