Abstract
Daylight Photoluminescence (dPL) is a relatively novel imaging technique using the principle idea of photoluminescence with the sun as excitation source. The difficult process of filtering the luminescence signal is described by means of implementing a dPL technique at EURAC Research in Bolzano, Italy. The described approach uses modern inverter or maximum power point tracker to alter the working point of modules, which allows imaging of two different images, whose subtraction results in the luminescence signal. Further, the impact of temperature on the luminescence signal is investigated. For this, the signal intensity is measured with dPL for different temperatures under controlled conditions. The impact that temperature has on different factors influencing the luminescence intensity is described. Finally, the impact of temperature on dPL in practical use is calculated from the results, presenting a first attempt to calculate the temperature coefficient of signal intensity in the dPL image.