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The Role of Mobility on Charge Generation, Recombination, and Extraction in Polymer‐Based Solar Cells
Author(s) -
Shoaee Safa,
Stolterfoht Martin,
Neher Dieter
Publication year - 2018
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.201703355
Subject(s) - materials science , organic semiconductor , organic solar cell , charge carrier , semiconductor , electron mobility , photovoltaics , nanotechnology , photovoltaic system , optoelectronics , charge (physics) , hybrid solar cell , polymer , chemical physics , chemistry , electrical engineering , physics , quantum mechanics , composite material , engineering
Organic semiconductors are of great interest for a broad range of optoelectronic applications due to their solution processability, chemical tunability, highly scalable fabrication, and mechanical flexibility. In contrast to traditional inorganic semiconductors, organic semiconductors are intrinsically disordered systems and therefore exhibit much lower charge carrier mobilities—the Achilles heel of organic photovoltaic cells. In this progress review, the authors discuss recent important developments on the impact of charge carrier mobility on the charge transfer state dissociation, and the interplay of free charge extraction and recombination. By comparing the mobilities on different timescales obtained by different techniques, the authors highlight the dispersive nature of these materials and how this reflects on the key processes defining the efficiency of organic photovoltaics.