TY - JOUR
T1 - Synthesis and Optical Properties of Cubic Chalcopyrite/Hexagonal Wurtzite Core/Shell Copper Indium Sulfide Nanocrystals
AU - Ning, Jiajia
AU - Kershaw, Stephen V.
AU - Rogach, Andrey L.
PY - 2019/12/26
Y1 - 2019/12/26
N2 - We report a synthetic method to produce heavy-metal-free heterophase core/shell CuInS2 nanocrystals, which comprise differently sized cores with a cubic chalcopyrite (CP) structure overgrown with hexagonal wurtzite (WZ) shells. For a given core size, CP/WZ core/shell CuInS2 nanocrystals experience shifts in both absorption and photoluminescence spectra toward the near-infrared with increasing shell thickness. Studies of the photoluminescence dynamics of these heterophase CuInS2 nanocrystals reveals behavior similar to that of the typical type II nanostructures constructed from different semiconductor materials of the same crystal structure. The interface between the CP core and the WZ shell has an important effect on the photoluminescence quantum yield.
AB - We report a synthetic method to produce heavy-metal-free heterophase core/shell CuInS2 nanocrystals, which comprise differently sized cores with a cubic chalcopyrite (CP) structure overgrown with hexagonal wurtzite (WZ) shells. For a given core size, CP/WZ core/shell CuInS2 nanocrystals experience shifts in both absorption and photoluminescence spectra toward the near-infrared with increasing shell thickness. Studies of the photoluminescence dynamics of these heterophase CuInS2 nanocrystals reveals behavior similar to that of the typical type II nanostructures constructed from different semiconductor materials of the same crystal structure. The interface between the CP core and the WZ shell has an important effect on the photoluminescence quantum yield.
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U2 - 10.1021/jacs.9b11498
DO - 10.1021/jacs.9b11498
M3 - RGC 21 - Publication in refereed journal
C2 - 31833362
SN - 0002-7863
VL - 141
SP - 20516
EP - 20524
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 51
ER -