Abstract

Colloidal quantum dots (CQDs) are promising for next-generation solution-processed optoelectronic devices such as solar cells, photodetectors, and light emitting diodes. In recent years, advances in CQD surface engineering have enabled the rapid rise in CQD solar efficiency from an initial 5% to the latest10%. Recently, a new solid phase of matter, the CQD/perovskite composite material (poly hetero crystalline (PHC) solid), was developed. Through epitaxial growth of perovskite on embedded CQDs, the CQD surface defects were dramatically reduced. Meanwhile, the excellent charge carrier mobility of the perovksite matrix was introduced into a CQD solid. The new CQD/perovskite PHC solid presents new opportunity to improve the performance of CQD based optoelectronic materials [1-6].

© 2015 Optical Society of America