title: Polymer homo-tandem solar cells with best efficiency of 11.3%.
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.
authors: Center for Polymers and Organic Solids, University of California Santa Barbara, Santa Barbara, CA, 93106, USA.
authors: Huiqiong
authors: H
authors: Zhou
authors: Yuan
authors: Y
authors: Zhang
authors: Cheng-Kang
authors: CK
authors: Mai
authors: Samuel D
authors: SD
authors: Collins
authors: Guillermo C
authors: GC
authors: Bazan
authors: Thuc-Quyen
authors: TQ
authors: Nguyen
authors: Alan J
authors: AJ
authors: Heeger
keywords: conjugated polyelectrolytes; hole-transporting layers; interface engineering; organic solar cells; tandem solar cells