Comment on "Interface state recombination in organic solar cells"

Abstract

In a recent paper, Street et al. [Phys. Rev. B 81, 205307 (2010)] propose first order recombination due to interface states to be the dominant loss mechanism in organic bulk heterojunction solar cells, based on steady-state current--voltage characteristics. By applying macroscopic simulations, we found that under typical solar cell conditions, monomolecular or bimolecular recombination cannot be inferred from the slope of the light intensity dependent photocurrent. In addition, we discuss the validity of calculating a mobility--lifetime product from steady-state measurements. We conclude that the experimental technique applied by Street et al. is not sufficient to unambiguously determine the loss mechanism.

4 pages, 2 figures. Corrected Eqns. (2) and (4): 1/... was missing

References in corpus (6)

• S-shaped current-voltage characteristics of organic solar devices
• Origin of the Efficient Polaron Pair Dissociation in Polymer--Fullerene Blends
• Origin of Reduced Polaron Recombination in Organic Semiconductor Devices
• Charge Carrier Concentration and Temperature Dependent Recombination in Polymer Fullerene Solar Cells
• Organic solar cell efficiencies under the aspect of reduced surface recombination velocities
• Bipolar Charge Transport in Poly(3-hexyl thiophene)/Methanofullerene Blends: A Ratio Dependent Study