Solution‐Processed Nanocrystal Quantum Dot Tandem Solar Cells

Solution-processed tandem solar cells created from nanocrystal quantum dots with size-tuned energy levels are demonstrated. Prototype devices featuring interconnected quantum dot layers of cascaded energy gaps exhibit IR sensitivity and an open circuit voltage, Voc, approaching 1 V. The tandem solar cell performance depends critically on the optical and electrical properties of the interlayer.