A Standalone, Battery?Free Light Dosimeter for Ultraviolet to Infrared Light

Light sensors are widely used to monitor light intensities, for instance in medical applications, agriculture or conservation of art. Most these electronic devices that record continuously but applications only require information integrated measured over a long time, could greatly benefit from an integrating dosimeter does not power supply. In this work wireless and quantitative is presented based on SrAl2O4:Eu2+,Sm3+, phosphor exhibits stable energy storage upon exposure blue ultraviolet light. It shown forward electron transfer europium samarium can be induced under illumination with while the reverse achieved by illuminating phosphors green infrared This accomplished through excitation divalent results bright, optically stimulated luminescence. The storage, combination possibility optical read-out, makes SrAl2O4:Eu2+,Sm3+ ideally suited as monochromatic broadband light, near infrared. To demonstrate this, proof concept was developed which successfully measure average daylight intensities.