Stamping Transfer of a Quantum Dot Interlayer for Organic Photovoltaic Cells

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An organophilic cadmium selenide (CdSe) quantum dot (QD) interlayer was prepared on the active layer in organic solar cells by a stamping transfer method. The mother substrate composed of a UV-cured film on a polycarbonate film with strong solvent resistance makes it possible to spin-coat QDs on it and dry transfer onto an active layer without damaging the active layer. The QD interlayers have been optimized by controlling the concentration of the QD solution. The coverage of QD particles on the active layer was verified by TEM analysis and fluorescence images. After insertion of the QD interlayer between the active layer and metal cathode, the photovoltaic performances of the organic solar cell were clearly enhanced. By ultraviolet photoelectron spectroscopy of CdSe QDs, it can be anticipated that the CdSe QD interlayer reduces charge recombination by blocking the holes moving to the cathode from the active layer and facilitating efficient collection of the electrons from the active layer to the cathode.
Publisher
AMER CHEMICAL SOC
Issue Date
2012-06
Language
English
Article Type
Article
Keywords

POLYMER SOLAR-CELLS; LIGHT-EMITTING-DIODES; OPEN-CIRCUIT VOLTAGE; BLOCKING LAYER; DEVICES; EFFICIENT; METAL; FABRICATION; INTERFACES; ELECTRODE

Citation

LANGMUIR, v.28, no.25, pp.9893 - 9898

ISSN
0743-7463
DOI
10.1021/la301477e
URI
http://hdl.handle.net/10203/101940
Appears in Collection
CBE-Journal Papers(저널논문)
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