Effect of metal-reflection and surface-roughness properties on power-conversion efficiency for polymer photovoltaic cells

Su Hwan Lee, Dal Ho Kim, Ji Heon Kim, Gon Sub Lee, Jea Gun Park

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

We investigated the effect of the reflectivity of various metal cathodes on the power-conversion efficiency (PCE) of organic photovoltaic (OPV) cells fabricated with a P3HT:PCBM blended layer. The reflectivity of the cathodes correlated well with the short-circuit current (Jsc) influenced by absorption of visible light reflected from the cathodes; that is, a higher reflectivity of the cathodes led to a higher Jsc. In addition, we analyzed how the surface roughness of a metal cathode influences the performance on the polymer PV cells. As a result, a higher reflectivity and a lower surface roughness of the metal cathodes gave a higher PCE. In addition, it was confirmed that the interface property between the metal cathodes and organic hole/exciton blocking layer strongly influences the PCE of OPV cells.

Original languageEnglish
Pages (from-to)21915-21920
Number of pages6
JournalJournal of Physical Chemistry C
Volume113
Issue number52
DOIs
StatePublished - 2009 Dec 1

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Photovoltaic cells
photovoltaic cells
Conversion efficiency
Polymers
surface roughness
Cathodes
cathodes
Surface roughness
Metals
polymers
metals
reflectance
short circuit currents
Excitons
Short circuit currents
excitons
cells

Cite this

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abstract = "We investigated the effect of the reflectivity of various metal cathodes on the power-conversion efficiency (PCE) of organic photovoltaic (OPV) cells fabricated with a P3HT:PCBM blended layer. The reflectivity of the cathodes correlated well with the short-circuit current (Jsc) influenced by absorption of visible light reflected from the cathodes; that is, a higher reflectivity of the cathodes led to a higher Jsc. In addition, we analyzed how the surface roughness of a metal cathode influences the performance on the polymer PV cells. As a result, a higher reflectivity and a lower surface roughness of the metal cathodes gave a higher PCE. In addition, it was confirmed that the interface property between the metal cathodes and organic hole/exciton blocking layer strongly influences the PCE of OPV cells.",
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Effect of metal-reflection and surface-roughness properties on power-conversion efficiency for polymer photovoltaic cells. / Lee, Su Hwan; Kim, Dal Ho; Kim, Ji Heon; Lee, Gon Sub; Park, Jea Gun.

In: Journal of Physical Chemistry C, Vol. 113, No. 52, 01.12.2009, p. 21915-21920.

Research output: Contribution to journalArticle

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T1 - Effect of metal-reflection and surface-roughness properties on power-conversion efficiency for polymer photovoltaic cells

AU - Lee, Su Hwan

AU - Kim, Dal Ho

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AU - Park, Jea Gun

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