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High‐Efficiency, Vacuum‐Deposited, Small‐Molecule Organic Tandem and Triple‐Junction Photovoltaic Cells
Author(s) -
Che Xiaozhou,
Xiao Xin,
Zimmerman Jeramy D.,
Fan Dejiu,
Forrest Stephen R.
Publication year - 2014
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201400568
Subject(s) - tandem , materials science , organic solar cell , energy conversion efficiency , triple junction , photovoltaic system , optoelectronics , fullerene , absorption (acoustics) , small molecule , layer (electronics) , band gap , nanotechnology , polymer , organic chemistry , chemistry , ecology , composite material , biology , biochemistry
High‐efficiency, vacuum‐deposited small‐molecule organic tandem and triple‐junction photovoltaic cells are demonstrated. The devices are composed of two sub‐cells with minimal absorption spectral overlap. A nearly transparent fullerene/wide‐energy gap organic mixture is introduced as the interconnecting blocking layer to further reduce cell losses. A power conversion efficiency of 10.0% is achieved for the tandem cell and 11.1% is achieved for a triple‐junction cell.