Effects of hole-collecting buffer layers and electrodes on the performance of flexible plastic organic photovoltaics

Sungho Woo, Hong Kun Lyu, Yoon Soo Han, Youngkyoo Kim

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Here we report the influences of the sheet resistance (Rsheet) of a hole-collecting electrode (indium tin oxide, ITO) and the conductivity of a hole-collecting buffer layer (poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate), PEDOT:PSS) on the device performance of flexible plastic organic photovoltaic (OPV) devices. The series resistance (RS) of OPV devices steeply increases with increasing Rsheet of the ITO electrode, which leads to a significant decrease of short-circuit current density (JSC) and fill factor (FF) and power conversion efficiency, while the open-circuit voltage (VOC) was almost constant. By applying high-conductivity PEDOT:PSS, the efficiency of OPV devices with high Rsheet values of 160 □ and 510 □ is greatly improved, by a factor of 3.5 and 6.5, respectively. These results indicate that the conductivities of ITO and PEDOT:PSS will become more important to consider for manufacturing large-area flexible plastic OPV modules.

Original languageEnglish
Article number398912
JournalInternational Journal of Photoenergy
Volume2013
DOIs
StatePublished - 2013

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