Article

Applied Physics A

, Volume 108, Issue 3, pp 515-520

First online:

Correlation of charge extraction properties and short circuit current in various organic binary and ternary blend photovoltaic devices

  • T. Birendra SinghAffiliated withMaterials Science and Engineering, Commonwealth Scientific and Industrial Research Organisation (CSIRO) Email author 
  • , Xiwen ChenAffiliated withMaterials Science and Engineering, Commonwealth Scientific and Industrial Research Organisation (CSIRO)
  • , Wallace W. H. WongAffiliated withSchool of Chemistry, Bio21 Institute, University of Melbourne
  • , Tino EhligAffiliated withMaterials Science and Engineering, Commonwealth Scientific and Industrial Research Organisation (CSIRO)
  • , Peter KemppinenAffiliated withMaterials Science and Engineering, Commonwealth Scientific and Industrial Research Organisation (CSIRO)
  • , Ming ChenAffiliated withMaterials Science and Engineering, Commonwealth Scientific and Industrial Research Organisation (CSIRO)
  • , Scott E. WatkinsAffiliated withMaterials Science and Engineering, Commonwealth Scientific and Industrial Research Organisation (CSIRO)
  • , Kevin N. WinzenbergAffiliated withMaterials Science and Engineering, Commonwealth Scientific and Industrial Research Organisation (CSIRO)
  • , Steven HoldcroftAffiliated withDept. of Chemistry, Simon Fraser University
    • , David J. JonesAffiliated withSchool of Chemistry, Bio21 Institute, University of Melbourne
    • , Andrew B. HolmesAffiliated withMaterials Science and Engineering, Commonwealth Scientific and Industrial Research Organisation (CSIRO)School of Chemistry, Bio21 Institute, University of Melbourne

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Abstract

Charge extraction properties of various binary and ternary blends of organic photovoltaic devices covering both polymers and small molecules are studied. Due to their bipolar nature, both slow and fast carrier mobilities are identified from the extraction current transient. The equilibrium carrier concentration is also estimated for each of the blend films. The product of the slow carrier mobility and equilibrium concentration spreading two orders of magnitude can be used to estimate the short circuit current density. A good agreement between the estimated and measured short circuit current density is obtained with the accuracy reliant on the estimation of the slowest carrier mobility. This simplistic approach will be very useful to predict the short circuit current density for devices based on new materials.