Journal
THIN SOLID FILMS
Volume 553, Issue -, Pages 161-165Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2013.11.127
Keywords
Nb-doped TiO2 nanoparticles; Sol-gel method; Organically modified; Thin film; Hole-blocking layer; Organic hetero-junction solar cell
Categories
Funding
- Center for Electro-Photo Behaviors in Advanced Molecular Systems at POSTECH [2012-0000532]
- New & Renewable Energy of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Korea Government Ministry of Knowledge Economy [2012T100100054]
- National Research Foundation of Korea
- Korean Government (MEST) [NRF-2012R1A2A2A01014288]
Ask authors/readers for more resources
In this study, Nb-doped TiO2 nanoparticles were synthesized by sol-gel method with controlled doping ratios up to 6 mol%. Catalyzed by p-toluene sulfonic acid, alkoxide precursors of Ti and Ni were stabilized by acetylacetone ligand, and converted to the organically modified nanoparticles which were well dispersible in alcohols. Transmission electron microscopy and X-ray diffraction measurements revealed that TiO2 nanoparticle possesses anatase morphologies, and the doping ratios were confirmed by X-ray photoelectron spectroscopy. Uniform thin films of Nb-doped TiO2 were obtained by spin coating dilute alcohol dispersions of Nb-doped nanoparticles. Ellipsometric characterizations were carried out for the as-coated film and the sintered film as well to characterize the indices of refraction, and atomic force microscopy showed subnanometer-scale roughness of Nb-doped films. Owing to the improved roughness via doping, Nb-doped TiO2 thin films exhibited enhanced solar cell efficiencies when used as hole-blocking layer of organic hetero-junction solar cell. (C) 2013 Elsevier B. V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available