Synthesis and thermal annealing treatment of octylphosphonic acid-capped CdSe-tetrapod nanocrystals for bulk hetero-junction solar cell applications

Title
Synthesis and thermal annealing treatment of octylphosphonic acid-capped CdSe-tetrapod nanocrystals for bulk hetero-junction solar cell applications
Author(s)
트롱윈탐윈트린탄키에우팜하우텐비엣김창득박진호
Keywords
SEMICONDUCTOR CLUSTERS; QUANTUM DOTS; CDE E; POLYMER; SPECTROSCOPY; SURFACE; OXIDE; SE; TE
Issue Date
201504
Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
Citation
KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.32, no.4, pp.761 - 766
Abstract
CdSe-tetrapod nanocrystals (NCs) were synthesized by using octylphosphonic acid (OPA) as a capping ligand and cadmium oxide (CdO) as a cadmium precursor. The effects of thermal annealing in nitrogen (N-2) environment on the chemical composition, morphology, crystal structure and optoelectronic properties of the CdSe-tetrapods have been investigated. Remarkable difference in the morphological and optoelectronic properties between as-synthesized and N-2-annealed CdSe NCs was observed. The photoluminescence (PL) peak of N-2-annealed CdSe NCs shifted to lower energy and UV-vis absorption spectra shifted to longer wavelength, indicating the size increase and improvement of the crystallinity of the CdSe tetrapods. The power conversion efficiency of bulk hetero-junction solar cells made with the annealed CdSe NCs showed higher value compared with the efficiency of cells made with as-synthesized CdSe NCs.
URI
http://hdl.handle.net/YU.REPOSITORY/32760http://dx.doi.org/10.1007/s11814-014-0300-3
ISSN
0256-1115
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공과대학 > 화학공학부 > Articles
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