Blue Luminescence from (CdS)ZnS Core–Shell Nanocrystals

10.1038/370354a0

10.1063/1.113227

10.1126/science.281.5385.2013

10.1126/science.281.5385.2016

10.1021/ja002535y

10.1038/nature01217

10.1126/science.1068153

10.1002/adma.200305449

10.1021/ja00072a025

10.1016/j.orgel.2003.08.016

10.1021/jp9530562

10.1021/jp971091y

ZnSe has a room‐temperature bulk band gap of 2.7 eV (460 nm).

10.1021/jp9810217

ZnTe and CdS have room‐temperature bulk band gaps of 2.39 (519 nm) and 2.42 eV (512 nm) respectively.

10.1002/1521-3757(20020703)114:13<2474::AID-ANGE2474>3.0.CO;2-#

10.1002/1521-3773(20020703)41:13<2368::AID-ANIE2368>3.0.CO;2-G

The QD PL quantum efficiencies were determined by comparing the integrated emission of a given QD sample in dilute hexane solution with an optical density of 0.1 with that of the laser dye Coumarin 102 (Lambda Physik) in ethanol.

10.1021/nl0155126

WDS confirmed the thickness of the ZnS shell for the QD sample shown in Figures 2 b and 5 c giving an average element weight percent of 21.6±0.9 % for Cd 32.2±0.5 % for Zn and 46.2±0.7 % for S. These values correspond to a 0.77 nm (2.5 monolayers) thick theoretical ZnS shell which is consistent with the average experimental thickness obtained from TEM.

10.1002/adma.200305162

D. A.Zehnder M. P.Bruchez J. A.Treadway J. P.Earhart US Patent 20020144644 2002.

ITO=indium tin oxide; CBP=4 4′‐N N′‐dicarbazolyl‐biphenyl; TAZ=3‐(4‐biphenylyl)‐4‐phenyl‐5‐tert‐butylphenyl‐1 2 4‐triazole; Alq3=tris‐(8‐hydroxyquinoline)aluminum.