Title
Determining the internal quantum efficiency of highly efficient polymer solar cells through optical modeling
Author
Kroon, J.M.
Slooff, L.H.
Veenstra, S.C.
Koetse, M.M.
Sweelssen, J.
Moet, D.J.D.
Publication year
2007
Abstract
A power conversion efficiency of 4.2% (AM1.5, 1000 W/M2) is measured for an organic solar cell based on an active layer of an alternating copolymer, containing a fluorence and a benzothadiazole unit with two neighboring thiophene rings, and a fullerene derivative. Using optical modeling, the absorption profile in the active layer of the solar cell is calculated and used to calculate the maximum short circuit current. The calculated currents are compared with measured currents from current-voltage measurements for various film thicknesses. From this the internal quantum efficiency is estimated to be 75% at the maximum for the best device. Copyright (2007) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
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TNO identifier
845496
Report number
ECN-W--07-004
Publisher
ECN, Petten
Document type
article