Patent ID: 8994005
Filing Date: 2015-03-31
Classification: B82Y,H01L,Y10S

Abstract:
1. A nanomaterial comprising: a plurality of quantum dot layers, each quantum dot layer comprising a plurality of quantum dots disposed in an undoped semiconductor material; wherein the plurality of quantum dots includes individual quantum dots, quantum dot clusters, or a combination of quantum dots and quantum dot clusters; wherein adjacent quantum dot layers are separated by a spacer layer of n-doped semiconductor material having a thickness of 15 nm to 50 nm such that the quantum dots have built-in charge of at least two electrons per dot and no intermediate bands are formed, wherein at least 90% of the dopant is present in a discrete region of the spacer layer; and wherein at least 50% of the individual quantum dots in adjacent quantum dot layers are vertically correlated or at least 50% of centers of the quantum dot clusters in adjacent quantum dot layers are vertically correlated.