▎ 摘　　要

NOVELTY - Hydroxide radical generating system comprises up conversion layer (100), photocatalyst layer (120) formed to contact the up-conversion layer and photonic crystal layer (140) formed to contact the photocatalyst layer. The up-conversion layer includes a first up-conversion layer (110) and a second up-conversion layer (130). The first up-conversion layer is formed to contact one surface of the photocatalyst layer and the second up-conversion layer is formed to contact the other surface of the photocatalyst layer. USE - Used as hydroxide radical generating system. ADVANTAGE - The hydroxide radical generating system: improves efficiency using solar energy by converting it into a short wavelength of high energy by a photocatalyst by utilizing a triplet-triplet upconversion extinction function and photonic crystal; has increased luminous intensity as light scattered on the photonic crystal and environmentally friendly. DETAILED DESCRIPTION - An independent claim is also included for generating hydroxyl radicals comprising irradiating light to the hydroxyl radical generating system, first up-converting the irradiated light by passing through a first up-conversion layer, generating a first hydroxyl radical by absorbing light passing through the first up-conversion layer in a photocatalyst layer, reflecting the light passing through the photocatalyst layer to the photonic crystal layer, up-converting the reflected light by passing through a second up-conversion layer and absorbing light passing through the second up-conversion layer in a photocatalyst layer to generate a second hydroxyl radical. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a hydroxide radical generating system. 100Upward conversion layer 110First up-conversion layer 120Photocatalytic layer 130Secondly up-conversion layer 140Photon crystal layer