TOP > 外国特許検索 > LIGHT ABSORBING BODY, BOLOMETER, INFRARED RAY ABSORBING BODY, SOLAR THERMAL POWER GENERATING DEVICE, RADIANT COOLING FILM, AND METHOD FOR MANUFACTURING LIGHT ABSORBING BODY

LIGHT ABSORBING BODY, BOLOMETER, INFRARED RAY ABSORBING BODY, SOLAR THERMAL POWER GENERATING DEVICE, RADIANT COOLING FILM, AND METHOD FOR MANUFACTURING LIGHT ABSORBING BODY

外国特許コード F180009484
整理番号 08607
掲載日 2018年10月2日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2017JP030403
国際公開番号 WO 2018043298
国際出願日 平成29年8月24日(2017.8.24)
国際公開日 平成30年3月8日(2018.3.8)
優先権データ
  • 特願2016-169692 (2016.8.31) JP
発明の名称 (英語) LIGHT ABSORBING BODY, BOLOMETER, INFRARED RAY ABSORBING BODY, SOLAR THERMAL POWER GENERATING DEVICE, RADIANT COOLING FILM, AND METHOD FOR MANUFACTURING LIGHT ABSORBING BODY
発明の概要(英語) In order to achieve a light absorbing body wherein the wavelengths absorbed can be adjusted, an embodiment of the present invention provides a light absorbing body 100 provided with a group of dielectric protrusions 102, a conductive thin film 104, and a conductive thick film 108. The group of dielectric protrusions has each dielectric protrusion protruding at a random position on a dielectric surface. A dielectric thin film is disposed on at least part of the surface of the dielectric protrusions or above the same and on at least part of the dielectric surface where the dielectric protrusions are not present or above the same, and the dielectric thick film spreads out along the dielectric surface separate from the dielectric thin film. The group of dielectric protrusions can be achieved by disposition of dielectric particles in random positions within the surface. The present invention also provides a bolometer, an infrared ray absorbing body, a solar thermal power generating device, and a radiant cooling film using the light absorbing body above as well as a method for manufacturing the light absorbing body.
従来技術、競合技術の概要(英語) BACKGROUND ART
Visible light or infrared rays are handled as the center wavelength in the optical field of the electromagnetic wave (hereinafter referred to as' light 'or' light ') is, for a variety of applications to be utilized for absorption.Good light absorption characteristics in a wide wavelength range or, the rate of absorption for each wavelength of light or to adjust the value of the object with respect to the absorption ('light absorption') is designed, and is applicable to a wide variety of applications to be very useful.For example for thermal bolometer detection apparatus, such as an alternative to the absorbent material of the current gold black light absorber is demanded.In the solar cell, sunlight as the 300nm - 2500nm wide wavelength range of light absorbed by the active layer can be improved to a large performance can be expected.Efficiently absorbs the solar power generation using solar heat as long as it can be used.Further absorption wavelength range can be controlled properly also in another application the technology been desired earnestly.Absorbs the infrared region of the solar-ray absorbing glass, heat ray shielding function and light transmittance to achieve a function, such as visible light transmitting property such as ordinary glass has a function of the energy while cooling can be saved.And the window region of the atmosphere at a high absorption wavelength band is the absorber, the absorption rate becomes the same as the emissivity from the Kirchhoff's law, a space efficient release of thermal energy radiation of the cooling device and also as a radiator.In this way good absorption properties in a wide wavelength region is achieved, and further artificially adjust the wavelength range can be expected to be used in a wide variety of applications.
May typically have a light absorption of the pigment or dye and, they are, and an electron energy level difference between the levels of the vibration energy of the binding and used to absorb light of a specific wavelength.Therefore, the absorption wavelength range in a desired range depending on the chemical structure for the wavelength region absorbed by the material that needs to be designed.In the pigment or dye, the absorption wavelength region while suppressing the absorption in the wavelength region of another strong and transparent for such a design is often difficult.Further, the pigment or dye has a problem in the durability at the time of long-term use in some cases.
On the other hand, due to the surface plasmon absorption, surface plasmon is supported on the design of the structure of the bandwidth is adjustable by, and high durability can be expected.These properties are also important applications, for example for organic solar cells due to the surface plasmon absorption by incorporating, in a wide wavelength range can be used for power generation efficiency can be expected to improve (plasmonic solar cell).In this way, the normal solar cell is employed instead of the ITO transparent electrode surface plasmon having a plasmonic structure is supported on the plasmonic electrodes are used, which is supported by the enhanced light absorption by the surface plasmon, the photoelectric conversion efficiency can be improved.Further suitable electrode structure according to the enhanced light absorption is the incidence angle dependence, polarization dependence which shows very little.
The background in terms of light absorption by the surface plasmon and various proposals have been made, for example, in Non-Patent Document 1(K.Aydin et al., Nat.Commun. 2, 517 (2011)), periodically deformed in the hole opened in the thin silver film and silver thin film in a flat thickness of the transparent dielectric is interposed between the metal-dielectric-metal (MIM) structure has been disclosed is a light absorber.Non-Patent Document is 2(M. K.Hedayati et al., Adv.Mater. 23, 5410 (2011)), gold nanoparticles mixed in the silica layer and a flat thick gold film is interposed between the transparent dielectric optical absorber in the MIM structure has been disclosed.Non-Patent Document is 3(C.Ng et al., ACS Nano 10, 4704 (2016)), gold nanoparticles formed by aggregating a flat thick gold thin film in a layer sandwiched between a transparent dielectric optical absorber in the MIM structure has been disclosed.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • RIKEN
  • 発明者(英語)
  • TAKATORI KENTARO
  • OKAMOTO TAKAYUKI
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG

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