Dong-Hun Kim, Kyung-Geun Lim, Prof. Jong Hyeok Park and Prof. Tae-Woo Lee Controlling Surface Enrichment in Polymeric Hole Extraction Layers to Achieve High-Efficiency Organic Photovoltaic Cells ChemSusChem 5
Top job: Hole extraction in organic photovoltaic cells (OPVs) is modulated by a surface-enriched layer formed on top of the conducting polymer-based hole extraction layer (HEL). This tunes the surface work function of the HEL to better align with the ionization potential of the polymeric photoactive layer. Herein, we show a noticeable improvement in device power conversion efficiencies (PCEs) based on rational pretreatment.
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