• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Layer-by-Layer Fabrication of Nanowire Sensitized Solar Cells: Geometry-Independent Integration
【24h】

Layer-by-Layer Fabrication of Nanowire Sensitized Solar Cells: Geometry-Independent Integration

机译：纳米线敏化太阳能电池的逐层制造：几何无关的集成

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

Thin film solar cells that are low in cost but still reasonably efficient comprise an important strategy for reaching price-performance ratios competitive with fossil fuel electrical generation. Sensitized solar cells - most commonly dye but also semiconductor nanocrystal sensitized - are a thin film device option benefitting from lost cost material components and processing. Nanocrystal sensitized solar cells are predicted to outpace their dye-based counterparts, but suffer from limited availability of approaches for integrating the nano-sensitizers within a mesoporous oxide anode, which effectively limits the choice of sensitizer to those that are synthesized in situ or those that are easily incorporated into the oxide framework. The latter methods favor small, symmetric nanocrystals, while highly asymmetric semiconductors (e.g., nanowires, tetrapods, carbon nanotubes) have to date found limited utility in sensitized solar-cell devices, despite their promise as efficient solar energy converters. Here, a new strategy for solar cell fabrication is demonstrated that is independent of sensitizer geometry. Nanocrystal-sensitized solar cells are fabricated from either CdSe semiconductor quantum dots or nanowires with facile control over nanocrystal loading. Without substantial optimization and using low processing temperatures, efficiencies approaching 2% are demonstrated. Furthermore, the significance of a 'geometry-independent' fabrication strategy is shown by revealing that nanowires afford important advantages compared to quantum dots as sensitizers. For equivalent nanocrystal masses and otherwise identical devices, nanowire devices yield higher power conversion efficiencies, resulting from both enhanced light harvesting efficiencies for all overlapping wavelengths and internal quantum efficiencies that are more than double those obtained for quantum dot devices.
机译：低成本但仍相当有效的薄膜太阳能电池是一项重要的战略，可达到与化石燃料发电竞争的性价比。敏化的太阳能电池（最常见的是染料，但敏化的半导体纳米晶体）是一种薄膜器件，可受益于成本降低的材料组件和工艺。纳米晶敏化的太阳能电池预计将超过其染料基对应物，但会受到将纳米敏化剂整合到中孔氧化物阳极中的方法的有限利用，这有效地将敏化剂的选择限制为就地合成的敏化剂或那些容易被结合到氧化物骨架中。后者的方法有利于小的对称的纳米晶体，而高度不对称的半导体（例如，纳米线，四脚架，碳纳米管）迄今为止在敏化太阳能电池设备中的应用受到限制，尽管它们有望成为有效的太阳能转换器。在此，展示了一种新的太阳能电池制造策略，该策略与敏化剂几何形状无关。纳米晶敏化太阳能电池是由CdSe半导体量子点或纳米线制成的，可以轻松控制纳米晶的负载。在没有实质性优化和使用低处理温度的情况下，效率接近2％。此外，通过揭示纳米线与作为敏化剂的量子点相比具有重要优势，表明了“几何无关”制造策略的重要性。对于等效的纳米晶体质量和其他相同的设备，纳米线设备产生更高的功率转换效率，这是由于所有重叠波长的光收集效率提高以及内部量子效率提高了两倍，而量子效率是量子点设备的两倍。

著录项

  • 来源
    《Advanced Functional Materials》 |2014年第43期|6843-6852|共10页
  • 作者

    Krishna P. Acharya; Zhiqiang Ji; Terry G. Holesinger; Jeffrey A. Crisp; Sergei A. Ivanov; Darrick J. Williams; Joanna L. Casson; Milan Sykora; Jennifer A. Hollingsworth;

  • 作者单位

    Materials Physics and Applications Division: Center for Integrated Nanotechnologies Los Alamos National Laboratory Los Alamos, New Mexico 87545, USA;

    Chemistry Division: Inorganic Isotope & Actinide Chemistry Los Alamos National Laboratory Los Alamos, New Mexico 87545, USA;

    Materials Physics and Applications Division: Materials Synthesis & Integrated Devices Los Alamos National Laboratory Los Alamos, New Mexico 87545, USA;

    Materials Physics and Applications Division: Center for Integrated Nanotechnologies Los Alamos National Laboratory Los Alamos, New Mexico 87545, USA;

    Materials Physics and Applications Division: Center for Integrated Nanotechnologies Los Alamos National Laboratory Los Alamos, New Mexico 87545, USA;

    Materials Physics and Applications Division: Center for Integrated Nanotechnologies Los Alamos National Laboratory Los Alamos, New Mexico 87545, USA;

    Chemistry Division: Physical Chemistry & Applied Spectroscopy Los Alamos National Laboratory Los Alamos, New Mexico 87545, USA;

    Chemistry Division: Inorganic Isotope & Actinide Chemistry Los Alamos National Laboratory Los Alamos, New Mexico 87545, USA;

    Materials Physics and Applications Division: Center for Integrated Nanotechnologies Los Alamos National Laboratory Los Alamos, New Mexico 87545, USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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