PHOTOLUMINESCENCE QUANTUM YIELD (PLQY) TEST OF QUANTUM DOT (QD) FILMS

摘要

Photoluminescence quantum yield (PLQY) testing of quantum dots is described. In one embodiment, a method involves heating a sample including quantum dots and illuminating the sample with a light source. The method involves measuring spectra of luminescence from the illuminated quantum dots of the sample at each of a plurality of temperatures. The method involves measuring each of the plurality of temperatures with a temperature sensor. The PLQY at each of the plurality of temperatures is computed based on the measured spectra. The method further involves computing a relationship between QD emission wavelength of the measured spectra and the plurality of temperatures measured with the temperature sensor. The relationship is used to determine the QD temperature corresponding to each of the PLQY computations. In one embodiment, an integrating sphere moves on a gantry over the samples.

主权项

1. A method of testing photoluminescence quantum yield (PLQY) of quantum dots, the method comprising:
heating a sample comprising the quantum dots; illuminating the sample with a light source; measuring spectra of luminescence from the illuminated quantum dots of the sample at each of a plurality of temperatures; measuring each of the plurality of temperatures with a temperature sensor; computing the PLQY at each of the plurality of temperatures based on the measured spectra; computing a relationship between quantum dot (QD) emission wavelength of the measured spectra and the plurality of temperatures measured with the temperature sensor; and determining a QD temperature corresponding to each of the PLQY computations based on the relationship between the QD emission wavelength and the plurality of temperatures measured with the temperature sensor.