کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1272208 1497479 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In2O3:Sn/TiO2/CdS heterojunction nanowire array photoanode in photoelectrochemical cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
In2O3:Sn/TiO2/CdS heterojunction nanowire array photoanode in photoelectrochemical cells
چکیده انگلیسی


• The ITO nanowire based photoanode with efficient device property is synthesized.
• TiO2 layer increases the fill factor and photocurrent density.
• Better optical property of ITO nanowire based electrode is due to scattering effect.
• The ITO nanowire based photoanode shows superior photocurrent density.

The design of photoanode with highly efficient light harvesting and charge collection properties is important in photoelectrochemical (PEC) cell performance for hydrogen production. Here, we report the hierarchical In2O3:Sn/TiO2/CdS heterojunction nanowire array photoanode (ITO/TiO2/CdS-nanowire array photoanode) as it provides a short travel distance for charge carrier and long light absorption pathway by scattering effect. In addition, optical properties and device performance of the ITO/TiO2/CdS-nanowire array photoanode were compared with the TiO2 nanoparticle/CdS photoanode. The photocatalytic properties for water splitting were measured in the presence of sacrificial agent such as SO32− and S2− ions. Under illumination (AM 1.5G, 100 mW/cm2), ITO/TiO2/CdS-nanowire array photoanode exhibits a photocurrent density of 8.36 mA/cm2 at 0 V versus Ag/AgCl, which is four times higher than the TiO2 nanoparticle/CdS photoanode. The maximum applied bias photon-to-current efficiency for the ITO/TiO2/CdS-nanowire array and the TiO2 nanoparticle/CdS photoanode were 3.33% and 2.09%, respectively. The improved light harvesting and the charge collection properties due to the increased light absorption pathway and reduced electron travel distance by ITO nanowire lead to enhancement of PEC performance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 30, 13 October 2014, Pages 17473–17480
نویسندگان
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