Reduction of series resistance in organic photovoltaic using low sheet resistance of ITO electrode

Jae Wook Kang, Sung Pil Lee, Do Geun Kim, Sunghun Lee, Gun Hwan Lee, Jong Kuk Kim, Sun Young Park, Joo Hyun Kim, Han Ki Kim, Yong Soo Jeong

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

The series resistance of organic photovoltaic (OPV) devices was decreased by reducing the sheet resistance (Rsh) of the indium tin oxide (ITO) electrode, which leads to increasing device efficiency. The performance of bulk heterojunction OPVs was critically dependent on Rsh of the ITO electrode. Upon reducing Rsh of the ITO from 39 to 8.5 , the fill factor and power conversion efficiency of OPV was improved (from 0.407 to 0.580 and from 1.63±0.2 to 2.5±0.1%, respectively) under an AM1.5 simulated solar intensity of 100 mW cm2. The dependence of the series resistance on Rsh of the ITO suggests the dominance of the bulk resistance of the ITO electrode as a limiting factor in practical cell efficiencies.

Original languageEnglish
Pages (from-to)H64-H66
JournalElectrochemical and Solid-State Letters
Volume12
Issue number3
DOIs
StatePublished - 2009
Externally publishedYes

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