Time-resolved and temperature-dependent photoluminescence of ternary and quaternary nanocrystals of CuInS2 with ZnS capping and cation exchange

Jaetae Seo, Sangram Limbaji Raut, Mahmoud Abdel-Fattah, Quinton Rice, Bagher Tabibi, Ryan Rich, Rafal Fudala, Ignacy Gryczynski, Zygmunt Gryczynski, Wan Joong Kim, Sungsoo Jung, Ruh Hyun

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Abstract

Time-resolved and temperature-dependent photoluminescence (PL) spectroscopy of ternary compound copper indium disulfide (CuInS2, or CIS) core materials, CIS/ZnS coreshells, and quaternary compound ZnCuInS2 (ZnCIS) revealed their optical properties with spectral, temporal, and thermal characteristics, which were closely linked to surface-related recombination, and shallow or deep defect-related donor-acceptor transitions. The PL peaks of semiconductor nanocrystals (SNCs) with sizes near Bohr radius displayed at ∼775 nm for CIS, ∼605 nm for CIS/ZnS, and ∼611 nm for ZnCIS. The spectral blue shift and spectral narrowing with CIS/ZnS and ZnCIS are assigned to the increased spatial confinement and surface regularity with the etching of core materials. Both the shorter lifetime at surface-trapped states or interface states and the longer lifetime at intrinsic defect-related states of CIS, CIS/ZnS, and ZnCIS SNCs were widely distributed across the entire PL spectral region. The surface or interface-trapped electrons were thermally active even at low temperatures, but the electrons at intrinsic defect-related states were relatively stable, which was attributable to the strong Coulomb energy between the charge carriers.

Original languageEnglish
Article number094310
JournalJournal of Applied Physics
Volume114
Issue number9
DOIs
StatePublished - 7 Sep 2013

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Commonwealth of Independent States
nanocrystals
photoluminescence
cations
temperature
defects
copper compounds
life (durability)
disulfides
blue shift
regularity
indium
charge carriers
electrons
etching
optical properties
radii
spectroscopy

Cite this

Seo, Jaetae ; Raut, Sangram Limbaji ; Abdel-Fattah, Mahmoud ; Rice, Quinton ; Tabibi, Bagher ; Rich, Ryan ; Fudala, Rafal ; Gryczynski, Ignacy ; Gryczynski, Zygmunt ; Kim, Wan Joong ; Jung, Sungsoo ; Hyun, Ruh. / Time-resolved and temperature-dependent photoluminescence of ternary and quaternary nanocrystals of CuInS2 with ZnS capping and cation exchange. In: Journal of Applied Physics. 2013 ; Vol. 114, No. 9.
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Time-resolved and temperature-dependent photoluminescence of ternary and quaternary nanocrystals of CuInS2 with ZnS capping and cation exchange. / Seo, Jaetae; Raut, Sangram Limbaji; Abdel-Fattah, Mahmoud; Rice, Quinton; Tabibi, Bagher; Rich, Ryan; Fudala, Rafal; Gryczynski, Ignacy; Gryczynski, Zygmunt; Kim, Wan Joong; Jung, Sungsoo; Hyun, Ruh.

In: Journal of Applied Physics, Vol. 114, No. 9, 094310, 07.09.2013.

Research output: Contribution to journalArticle

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AU - Seo, Jaetae

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AU - Gryczynski, Zygmunt

AU - Kim, Wan Joong

AU - Jung, Sungsoo

AU - Hyun, Ruh

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