公开(公告)号：US20170363789A1

公开(公告)日：2017-12-21

申请号：US15539362

申请日：2015-12-18

Applicant: BASF SE

Inventor： Martin STALDER ,  Benjamin GALLINET ,  Fabian LUETOLF ,  Guilaume BASSET ,  Rolando FERRINI ,  Patrice BUJARD ,  Adrian VON MUEHLENEN ,  Andreas HAFNER

IPC: G02B5/28 ,  G02B1/118 ,  E06B9/24 ,  H01L31/0216 ,  C23C14/58 ,  C23C14/20 ,  C23C14/06

CPC classification number: G02B5/282 ,  C23C14/0629 ,  C23C14/20 ,  C23C14/5873 ,  E06B9/24 ,  E06B2009/2417 ,  G02B1/118 ,  G02B5/281 ,  H01L31/02168 ,  Y02E10/52

Abstract: A translucent or transparent film or sheet device shows angular-independent IR reflectance, which comprises a substrate (1) covered with a layer of a dielectric high refractive index material (4) containing a thin metallic layer (3) embedded in said material, and a further layer (5) of translucent or transparent material covering said layer (4) of dielectric high refractive index material, characterized in that the embedded metal layer (3) is periodically interrupted with a periodicity of 50 to 800 nm such that metal covers at least 70% of the substrate area. The device may advantageously be integrated into a window, a glass facade element or especially onto a photovoltaic (PV) device, where it reduces the fraction of IR radiation passing into the building, or reduces heat take-up and thus lowers the operating temperature and improves the efficiency of the PV cell.