Oriented Bi2Se3 nanoribbons film: Structure, growth, and photoelectric properties

Large-area oriented Bi2Se3 nanoribbons films were first synthesized via a simple chemical route. The aligned Bi2Se3 nanoribbons with a typical width of 120-300 nm, thickness of 40-70 nm and length of tens microns were grown on a metal Ti foil. Optical absorption experiments revealed that the Bi2Se3 nanoribbons are narrow-band semiconductors with a band gap E-g approximate to 1.57 eV. The photoelectric properties of the oriented Bi2Se3 nanoribbons film was also investigated with a liquid junction photoelectrochemical solar cells system, and the highest short circuit photocurrent may be estimated att mA cm(-2). (C) 2010 Elsevier B.V. All rights reserved.