Solution processed thin films of Nb-doped TiO2 nanoparticles as hole blocking layer for organic solar cells

被引：8

作者：

Lee, Wonmok ^{[1
]}

Kim, Incheol ^{[1
]}

Ok, Ilwoo ^{[2
]}

Ahn, Dahee ^{[1
]}

Lee, Hyunjung ^{[3
]}

Kim, Jin-Ho ^{[4
]}

Kim, Kyungkon ^{[5
]}

机构：

[1] Sejong Univ, Dept Chem, Seoul 143747, South Korea

[2] Korea Inst Sci & Technol, Seoul 136791, South Korea

[3] Kookmin Univ, Sch Adv Mat Engn, Seoul, South Korea

[4] Korea Inst Ceram Engn & Technol, Inchon 467843, Gyeonggi, South Korea

[5] Ewha Womans Univ, Dept Chem, Seoul 136791, South Korea

来源：

THIN SOLID FILMS | 2014年 / 553卷

基金：

新加坡国家研究基金会;

关键词：

Nb-doped TiO2 nanoparticles; Sol-gel method; Organically modified; Thin film; Hole-blocking layer; Organic hetero-junction solar cell; ANATASE TIO2; CONDUCTION; BAND;

D O I：

10.1016/j.tsf.2013.11.127

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：161 / 165

页数：5

共 27 条

[1] XPS study of Nb-doped oxygen sensing TiO2 thin films prepared by sol-gel method [J].