Abstract
Tandem organic solar cells with peak conversion efficiencies (η) of 5.15% are demonstrated. This is achieved by stacking two different planar heterojunction devices, each with a high open-circuit voltage (Voc). The phthalocyanine based donor materials in the employed subcells possess complementary absorption, a quality of critical importance to optimize photocurrent in a series connected tandem cell. The tandem structure produces Voc values of nearly 2 V, while fill factor remains above 60%. The measured corresponds to a 40% increase compared to of the optimal single cells.
Original language | English (US) |
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Article number | 033301 |
Journal | Applied Physics Letters |
Volume | 97 |
Issue number | 3 |
DOIs | |
State | Published - Jul 19 2010 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)