Energy harvesting of non-emissive triplet excitons in tetracene by emissive PbS nanocrystals

Lead sulphide colloidal nanocrystals are now used to harvest non-emissive triplet excitons generated in a tetracene layer. Depending on the length of the ligands capping the nanocrystals, exciton transfer efficiency as high as 90% can be achieved.