| 摘要 |
Disclosed is a multiple light sensor comprising: piezoelectric material; first and second detecting film, arranged on the piezoelectric material with a separation distance therebetween, for receiving ultraviolet light and visible light, respectively, and changing the propagation velocity of elastic waves which have propagated through the piezoelectric material; and first and second elastic wave output units, arranged on the piezoelectric material so as to correspond one-to-one with the first and second detecting film, for generating electrical signals on the basis of changed elastic waves. Accordingly, the multiple light sensor can measure the strengths of the ultraviolet light and visible light by means of a single sensor by detecting changes in frequency, and as the change in frequency is measured by means of zinc oxide (ZnO), gallium nitride (GaN) or cadmium sulfide (CdS) nanoparticles, cost competitiveness can be assured. |
