Depletion of PCBM at the Cathode Interface in P3HT/PCBM Thin Films as Quantified via Neutron Reflectivity Measurements

J. Parnell, Andrew; D. F. Dunbar, Alan; J. Pearson, Andrew; A. Staniec, Paul; J. C. Dennison, Andrew; Hamamatsu, H.; W. A. Skoda, Maximilian; G. Lidzey, David; Jones, Richard

doi:10.1002/adma.200903971

Public

Depletion of PCBM at the Cathode Interface in P3HT/PCBM Thin Films as Quantified via Neutron Reflectivity Measurements

Published in Advanced Materials • May 23, 2010

Authors:

Andrew J. Parnell

Alan D. F. Dunbar

Andrew J. Pearson

Abstract

Using neutron reflectivity, self-stratification in a model P3HT/PCBM blend is observed. The as-spun and solvent-annealed films show a depletion of PCBM near the top surface and enrichment of PCBM at the substrate (see figure). Depletion of PCBM at the cathode interface in a photovoltaic device could...

Subject

Materials science

Reflectivity

Cathode

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