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Effect of 8-hydroxy-quinolinato lithium thickness on the power conversion efficiency of polymer photovoltaic cells

Title
Effect of 8-hydroxy-quinolinato lithium thickness on the power conversion efficiency of polymer photovoltaic cells
Author
박재근
Keywords
OPV; Polymer solar cell; P3HT: PCBM; Liq; Electron injection
Issue Date
2013-02
Publisher
Korean Physical Society; 1999
Citation
Journal of the Korean Physical Society, Feb 2013, 62(3), P.490-495
Abstract
We investigated the dependencies of a polymer photovoltaic (PV) cell on the thickness of its 8-hydroxy-quinolinato lithium (Liq) layer. The power conversion efficiency (PCE) of the polymer PV cell shows a trend similar to that of the fill factor (FF), but not to the open-circuit voltage (V (oc) ) and the short-circuit current (J (sc) ), for various Liq layer thicknesses. This trend is likely associated with the series resistance of the polymer PV cell, which depends on the thickness of the Liq layer. As a result, if the PCE of the polymer PV cells fabricated with a Liq layer is to be enhanced, a specific thickness (in our experiment, similar to 1.0 nm) should be used for the Liq layer. In addition, we suggest that the electron injection mechanism of the Liq layer between the small-molecular hole/exciton blocking layer (in our experiment, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP)) and the metal cathode (in our experiment, Al) strongly influences the PCE of polymer PV cells.
URI
http://link.springer.com/article/10.3938%2Fjkps.62.490http://hdl.handle.net/20.500.11754/44188
ISSN
0374-4884
DOI
10.3938/jkps.62.490
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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