MRS Proceedings

Table of Contents - Volume  1270  - Symposia GG/HH/II – Organic Photovoltaics and Related Electronics-From Excitons to Devices  

Editors : V.R. Bommisetty, N.S. Sariciftci, K. Narayan, G. Rumbles, P. Peumans, J. van de Lagemaat, G. Dennler, S.E. Shaheen


Effect of Transparent Electrode on the Performance of Bulk Heterojunction Solar Cells

2010 MRS Spring Meeting.

A.A. Damitha T Adikaaria1, Joe Briscoea2, Steve Dunna3, David Careya4 and Ravi Silvaa5

a1, University of Surrey, Advanced Technology Institute, Guildford, United Kingdom

a2, Cranfield University, Nanotechnology Centre, Cranfield, Bedford, United Kingdom

a3, University of London, Materials Department, School of Engineering and Materials, Queen Mary, London, United Kingdom

a4, University of Surrey, Advanced Technology Institute, University of Surrey, Guildford, GU2 7XH, United Kingdom

a5, Advanced Technology Institute, Faculty of Engineering and Physical Sciences, Guildford, Surrey, United Kingdom


We present a performance comparison of polythiophene/fullerene derivative bulk heterojunction solar cells fabricated on fluorinated tin oxide (FTO) and indium tin oxide (ITO) in the presence and absence of the commonly used poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) hole extraction layer. From a potential commercial perspective the performance of cheaper and more readily available FTO compares well with the more expensive ITO in terms of measured device efficiency (FTO:2.8 % and ITO:3.1%). The devices show similar fill factors (FTO:63% and ITO:64%) with the same open circuit voltage of 0.6 V. The short circuit current density is lower for FTO devices at 7.5 mA/cm2 which compares with 8.0 mA/cm2 for ITO; a behaviour that is mainly attributed to the reduced optical transmission of the FTO layer. Importantly, these devices were part fabricated and wholly characterized under atmospheric conditions. The quoted device performance is the best reported for FTO based bulk heterojunction systems in the absence of the highly acidic PEDOT:PSS hole extraction layer, which is believed to degrade conductive oxides.

(Received March 25 2010)

(Accepted September 09 2010)

Key Words:

  • photovoltaic;
  • organic;
  • electronic material