An Ultrathin, Nanogradient, and Substrate-Independent WOx-Based Film as a High Performance Flexible Solar Absorber
An Ultrathin, Nanogradient, and Substrate-Independent WOx-Based Film as a High Performance Flexible Solar Absorber
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超薄、纳米梯度且与基材无关的 WOx 基薄膜作为高性能柔性太阳能吸收器
DOI：
10.1002/solr.201900180
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发表时间：
2019
期刊：
影响因子：
7.9
通讯作者：
Yan Xingbin
中科院分区：
文献类型：
--
作者：
Wang Wei;Wen Huaixing;Shi Jing;Su Jinbu;Li Zhengtong;Wang Chengbing;Yan Xingbin
柔性和可穿戴能源相关设备的进步增加了对高效，低成本，可吸收太阳能选择性吸收涂层（SSAC）的需求。在此，报道了具有优异性能的纳米梯度WOx基SSAC的制造，包括0.93的上级太阳能吸收率、高达300 °C的出色热鲁棒性和基底独立性。更重要的是，基于WOx的SSAC的厚度仅约为100 nm，比所有其他已报道的SSAC薄得多。这些特征来自于薄纳米等离子体W层上的两个固有吸收WOx层。沉积工艺基于自掺杂反应溅射，通过少量氧气进行有限的钨氧化。柔性聚酰亚胺片材上的基于WOx的SSAC表现出稳定的性能、强粘附性和可弯曲性。所提出的自掺杂制造工艺提供了一种新的方法来设计具有成本效益的CSSAC，以满足大规模灵活的能量收集和供应应用的需求。
Advances in flexible and wearable energy‐related devices increase the need for highly efficient, low‐cost, ultrathin solar selective absorber coatings (SSACs). Herein, the fabrication of nanogradient WOx‐based SSACs with excellent properties, including a superior solar absorptance of 0.93, an outstanding thermal robustness of up to 300 °C, and substrate independence, is reported. More importantly, the thickness of WOx‐based SSACs is only approximately 100 nm, which is substantially thinner than all other reported SSACs. These features arise from the two intrinsically absorptive WOxlayers on a thin nanoplasmonic W layer. The deposition process is based on self‐doped reactive sputtering via limited tungsten oxidation due to a small amount of oxygen. The WOx‐based SSACs on a flexible polyimide sheet demonstrate stable performance, strong adhesion, and bendable nature. The proposed self‐doped fabrication process provides a new way to design cost‐effective ultrathin SSACs to meet the demand for large‐scale flexible energy harvesting and supply applications.