• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Enhanced Photoelectrochemical Energy Conversion in Ultrathin Film Photoanodes with Hierarchically Tailorable Mesoscale Structure
【24h】

Enhanced Photoelectrochemical Energy Conversion in Ultrathin Film Photoanodes with Hierarchically Tailorable Mesoscale Structure

机译：具有分层可调整的中尺度结构的超薄膜光阳极中增强的光电化学能量转换

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Highly porous electrode designs are often employed for photoelectrochemical energy conversion applications. Inverse opal structures generate high surface area electrodes to enhance light absorption in semiconductors with short carrier collection lengths, effectively increasing the optical depth of ultrathin film photoelectrodes. Here, the fabrication of hierarchically structured, host-guest photoelectrodes based on selective atomic layer deposition of ZnO in composite polystyrene-SiO2 nanosphere films is described. Nanostructured scaffolds for ultrathin film photoanodes are prepared with a facile, continuously tunable solution-phase synthesis. The characteristic length scales for absorption, carrier collection, and mass transport can be independently engineered into the electrode by choosing appropriate colloidal components for the composite scaffold. 20 nm ZnO photoanode layers based on the host-guest architecture exhibit roughly 500 times the photocurrent generated on an equivalent planar electrode and a 430% increase over a photoanode structured by a scaffold comprised of a close-packed assembly of identical SiO2 nanospheres. This results from an improved balance of reactant mass transport and the locus of light absorption throughout the electrode. This approach offers a facile route for preparing strategically nanostructured photoelectrodes based on strategies developed from more complex fabrication techniques.
机译：高度多孔的电极设计通常用于光电化学能量转换应用。反蛋白石结构产生高表面积的电极，以增强载流子收集长度短的半导体的光吸收，有效地增加了超薄膜光电电极的光学深度。这里，描述了基于在复合聚苯乙烯-SiO 2纳米球膜中的ZnO的选择性原子层沉积的分层结构的主客体光电极的制造。超薄薄膜光阳极的纳米结构支架是通过轻松，连续可调的溶液相合成制备的。通过为复合支架选择合适的胶体成分，可以将吸收，载流子收集和质量传输的特征长度标度独立地设计到电极中。基于主体-客体结构的20 nm ZnO光电阳极层表现出在等效平面电极上产生的光电流的大约500倍，比由由相同SiO2纳米球的密堆积组件组成的支架结构的光电阳极增加430％。这是由于改善了反应物质量传输和整个电极的光吸收轨迹之间的平衡。这种方法提供了一种基于从更复杂的制造技术中开发的策略来制备具有战略意义的纳米结构光电极的简便途径。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号