A simple parallel tandem organic solar cell based on metallophthalocyanines

A simple parallel tandem solar cell based on a combination of Zn-phthalocyanine (Pc) and ClInPc has been fabricated and characterized. Compared to a traditional series tandem cell, parallel tandem cells eliminate the need for a semitransparent recombination layer, reducing the complexity of device f...

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Bibliographic Details
Published in:Applied physics letters 2011-04, Vol.98 (17), p.173301-173301-3
Main Authors: Yuen, Avery P., Hor, Ah-Mee, Preston, John S., Klenkler, Richard, Bamsey, Nathan M., Loutfy, Rafik O.
Format: Article
Language:English
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Summary:A simple parallel tandem solar cell based on a combination of Zn-phthalocyanine (Pc) and ClInPc has been fabricated and characterized. Compared to a traditional series tandem cell, parallel tandem cells eliminate the need for a semitransparent recombination layer, reducing the complexity of device fabrication while still providing an excellent increase in device performance. Results show a realized broadening of the spectral response and enhancement of the external quantum efficiency as a result of the complementary absorption profiles of ZnPc and ClInPc in the near infrared region. Introduction of a blended ClInPc : C 60 layer is shown to more than double the power conversion efficiency of a standard ZnPc / C 60 bilayer device ( PCE = 0.86 % ) . The enhanced performance of the parallel tandem ( PCE = 1.81 % ) arises from an increase in both the open circuit voltage and the short circuit current.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3579250