Optimization of hybrid photoelectrodes for solar water-splitting

被引：72

作者：

Miller, EL ^{[1
]}

Marsen, B ^{[1
]}

Paluselli, D ^{[1
]}

Rocheleau, R ^{[1
]}

机构：

[1] Univ Hawaii, Hawaii Nat Energy Inst, Honolulu, HI 96822 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2005年 / 8卷 / 05期

关键词：

D O I：

10.1149/1.1887196

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The "Hybrid Photoelectrode", a multi-junction thin film device for producing hydrogen through solar-powered water-splitting, is presented. In this monolithically stacked device configuration, an outer semiconductor-electrolyte junction acts in conjunction with underlying photovoltaic solid state-junctions to generate sufficient photovoltage and photocurrent for unassisted water photoelectrolysis. An initial prototype device, consisting of an amorphous-silicon-based photovoltaic tandem junction coated with a reactively sputtered tungsten trioxide film, exhibited stable solar-to-hydrogen (STH) conversion in acidic media at 0.6% efficiency. An efficiency of 2.2% STH is projected for a device based on recently developed tungsten trioxide films and existing thin-film-silicon tandem devices. The potential for further efficiency increase by materials and device optimizations is discussed. (C) 2005 The Electrochemical Society.

引用

页码：A247 / A249

页数：3

共 17 条

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