Ethanol vapor processing of titania nanotube array films: enhanced crystallization and photoelectrochemical performance

被引：13

作者：

Sharma, Sanjeev ^{[1
]}

Varghese, Oomman K. ^{[1
]}

Mor, Gopal K. ^{[1
]}

LaTempa, Thomas J. ^{[1
]}

Allam, Nageh K. ^{[1
]}

Grimes, Craig A. ^{[1
]}

机构：

[1] Penn State Univ, Dept Elect Engn, Dept Mat Sci & Engn, University Pk, PA 16802 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2009年 / 19卷 / 23期

关键词：

SOLVOTHERMAL SYNTHESIS; TIO2; NANOTUBES; SOLAR-CELLS; NANOPARTICLES; OXIDATION; GROWTH; LENGTH;

D O I：

10.1039/b900023b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A significant enhancement in the photoconversion efficiency of anodically grown, thermally annealed titania nanotube array photoanodes was observed when subjected to an ethanol vapor treatment that resulted in improved crystallization. Ethanol vapor treatment of 6 mu m long vertically aligned titania nanotube array films initially annealed at 580 degrees C for 6 h in an oxygen environment, under autogeneous pressure at 140 degrees C (approximate to 50 psi), resulted in an increase of up to similar to 30% in the photoconversion efficiency. A significant improvement in the crystallinity as revealed by glancing angle X-ray diffraction (GAXRD) and Raman spectroscopy studies as well as incident photon to current conversion efficiency (IPCE) is observed in the vapor treated samples.

引用

页码：3895 / 3898

页数：4

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