The optical duality of tellurium nanoparticles for broadband solar energy harvesting and efficient photothermal conversion.
The optical duality of tellurium nanoparticles for broadband solar energy harvesting and efficient photothermal conversion.
复制标题
DOI：
10.1126/sciadv.aas9894
复制
发表时间：
2018-08
期刊：
影响因子：
13.6
通讯作者：
Yang G
中科院分区：
文献类型：
--
作者：
Ma C;Yan J;Huang Y;Wang C;Yang G
碲纳米颗粒用于宽带太阳能收集和高效光热转换。为了缓解全球能源危机，迫切需要用于太阳能收集和光热转换的纳米光子材料。我们证明了由具有宽尺寸分布的碲（Te）纳米颗粒制成的宽带吸收体可以吸收整个光谱中超过85%的太阳辐射。在太阳光照射下，吸收体的温度可在100 s内从29° C升高到85°C。通过将Te纳米颗粒分散到水中，在78.9 mW/cm 2的太阳辐射下，水蒸发速率提高了三倍。这种光热转换超过了之前报道的等离子体或全介电纳米颗粒。我们还建立了Te的独特介电常数是负责高性能。介电常数的真实的部分在紫外-可见-近红外区域经历了从负到正的转变，这赋予了Te纳米颗粒类等离子体和全介电的双重性。由于类等离子体共振和米氏型共振的增强，总吸收覆盖了太阳辐射的整个光谱。这是第一个报道的材料，同时具有等离子体和全介电性质的太阳辐射区域。这些研究结果表明，Te纳米粒子可以预期是一种先进的光热转换材料，用于太阳能水蒸发。
Tellurium nanoparticles are used for broadband solar energy harvesting and efficient photothermal conversion. Nanophotonic materials for solar energy harvesting and photothermal conversion are urgently needed to alleviate the global energy crisis. We demonstrate that a broadband absorber made of tellurium (Te) nanoparticles with a wide size distribution can absorb more than 85% solar radiation in the entire spectrum. Temperature of the absorber irradiated by sunlight can increase from 29° to 85°C within 100 s. By dispersing Te nanoparticles into water, the water evaporation rate is improved by three times under solar radiation of 78.9 mW/cm2. This photothermal conversion surpasses that of plasmonic or all-dielectric nanoparticles reported before. We also establish that the unique permittivity of Te is responsible for the high performance. The real part of permittivity experiences a transition from negative to positive in the ultraviolet-visible–near-infrared region, which endows Te nanoparticles with the plasmonic-like and all-dielectric duality. The total absorption covers the entire spectrum of solar radiation due to the enhancement by both plasmonic-like and Mie-type resonances. It is the first reported material that simultaneously has plasmonic-like and all-dielectric properties in the solar radiation region. These findings suggest that the Te nanoparticle can be expected to be an advanced photothermal conversion material for solar-enabled water evaporation.
登录
查看更多内容
影响因子：
29.4
作者：
Politano, Antonio;Argurio, Pietro;Curcio, Efrem
通讯作者：
Curcio, Efrem
氮化钛耐火等离子体：宽带超材料吸收器
影响因子：
29.4
作者：
Li, Wei;Guler, Urcan;Kildishev, Alexander V.
通讯作者：
Kildishev, Alexander V.
影响因子：
9
作者：
Ma, Churong;Yan, Jiahao;Yang, Guowei
通讯作者：
Yang, Guowei
超长高质量碲纳米管：合成、表征和光学性能
影响因子：
3.8
作者：
Song, Ji-Ming;Lin, Yun-Zhi;Yu, Shu-Hong
通讯作者：
Yu, Shu-Hong
影响因子：
3.7
作者：
UCHIDA, N
通讯作者：
UCHIDA, N