UP-CONVERSION DEVICES WITH A BROAD BAND ABSORBER

摘要

Embodiments of the invention are directed to an IR photodetector that broadly absorbs electromagnetic radiation including at least a portion of the near infrared (MR ) spectrum. The IR photodetector comprises polydispersed QDs of PbS and/or PbSe. The IR photodetector can be included as a layer in an up-conversion device when coupled to a light emitting diode (LED) according to an embodiment of the invention.