☆ 4.6 Article

A simple parallel tandem organic solar cell based on metallophthalocyanines

APPLIED PHYSICS LETTERS (2011)

Journal

APPLIED PHYSICS LETTERS

Volume 98, Issue 17, Pages -

Publisher

AMER INST PHYSICS

DOI: 10.1063/1.3579250

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Categories

Physics, Applied

Funding

Ontario Centres of Excellence
Natural Sciences and Engineering Research Council of Canada

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Abstract

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. (C) 2011 American Institute of Physics. [doi:10.1063/1.3579250]

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