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Synthesis and Characterization of Chalcopyrite (CuInS2 and CuhInSe2) Colloidal Nanoparticles for Optoelectronic Applications via Low-Temperature Pyrolysis of Single-Source PrecursorsNanocrystalline (or quantum dot) materials hold potential as components of next-generation photovoltaic (PV) devices. The inclusion of quantum dots in PV devices has been proposed as a means to improve the efficiency of photon conversion (quantum dot solar cell), enable low-cost deposition of thin-films, provide sites for exciton dissociation, and pathways for electron transport. Quantum dots are also expected to be more resistant to degradation from electron, proton, and alpha particle radiation than the corresponding bulk material, a requirement for use in space solar ~sells. Chalcopyrite nanocrystals can be produced by low-temperature thermal decomposition of single-source precursors such as (PR3)2CuIn(ER')4 (R = Ph, R' = Et, E = S; R = R' = Ph, E = Se). Single-source precursors are molecules which contain all the necessary elements for synthesis of a desired material. Thermal decomposition of the precursor results in the formation of material with the correct stoichiometry as a nanocrystalline powder or a thin film, often at significantly lower temperatures than those typically employed for thin-film deposition by multi-source evaporation techniques, typically less than 500 C. We show that CuInSz and CuInSe2 nanocrystals can be synthesized from the precursors at temperatures as low as 250 C. The nanocrystals are characterized by optical spectroscopy, X-ray diffraction, and electron microscopy.
Document ID
20050207430
Acquisition Source
Glenn Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Castro, S. L.
(Ohio Aerospace Inst. Cleveland, OH, United States)
Bailey, S. G.
(NASA Glenn Research Center Cleveland, OH, United States)
Raffaelle, R. P.
(Rochester Inst. of Tech. NY, United States)
Banger, K. K.
(Ohio Aerospace Inst. Cleveland, OH, United States)
Fahey, Stephen
(Rochester Inst. of Tech. NY, United States)
Hepp, A. F.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 23, 2013
Publication Date
July 15, 2003
Subject Category
Solid-State Physics
Meeting Information
Meeting: Clusters, Nanocrystals and Nanostructures
Location: New London, CT
Country: United States
Start Date: August 3, 2003
End Date: August 8, 2003
Sponsors: Gordon Research Conferences, Inc.
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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