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Updated: Apr 17, 2026

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
Published on: November 5, 2014
Polymer homo-tandem solar cells with best efficiency of 11.3%
Huiqiong Zhou1, Yuan Zhang, Cheng-Kang Mai
1Center for Polymers and Organic Solids, University of California Santa Barbara, Santa Barbara, CA, 93106, USA.
Abstract:
Rational materials design and interface engineering are both essential to realize a high performance for tandem cells. Two identical bulk heterojunctions are connected in series using novel interconnection layers combining pH-neutral conjugated polyelectrolytes and a thin film of ZnO nanoparticles by a solution process. The best performing tandem cells achieve a power conversion efficiency of 11.3%, with 25% enhancement in efficiency compared with single cells, which arises primarily from the increased light absorption.
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