Effects of Hole-Collecting Buffer Layers and Electrodes on the Performance of Flexible Plastic Organic Photovoltaics. (1st August 2013)

• Record Type: Journal Article
• Authors: Woo, Sungho; Lyu, Hong-Kun; Han, Yoon Soo; Kim, Youngkyoo
• Other Names: Caramori Stefano Academic Editor.
• Is Part Of: International journal of photoenergy. Volume 2013(2013)
• Publication Date: 2013-08-01
• Subjects: Photochemistry -- Periodicals; Photobiology -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Photochimie; Photobiologie; Chimie physique et théorique; Chemistry, Physical and theoretical; Photobiology; Photochemistry; Electronic journals; Periodicals; 541.35
• DOI: 10.1155/2013/398912
• Languages: English
• ISSNs: 1110-662X

Abstract

Abstract : Here we report the influences of the sheet resistance (R sheet ) 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 (R S ) of OPV devices steeply increases with increasing R sheet of the ITO electrode, which leads to a significant decrease of short-circuit current density (J SC ) and fill factor (FF) and power conversion efficiency, while the open-circuit voltage (V OC ) was almost constant. By applying high-conductivity PEDOT:PSS, the efficiency of OPV devices with high R sheet values of 160 Ω/□ and 510 Ω/□ 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.