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Organic Solar Cells: Electrostatic Stabilization of Organic Semiconductor Nanoparticle Dispersions by Electrical Doping
Author(s) -
Manger Felix,
Marlow Philipp,
Fischer Karen,
Nöller Manuel,
Sprau Christian,
Colsmann Alexander
Publication year - 2022
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202202566
Subject(s) - materials science , nanoparticle , organic solar cell , organic semiconductor , doping , polymer , chemical engineering , nanotechnology , semiconductor , fullerene , fabrication , deposition (geology) , organic chemistry , optoelectronics , composite material , medicine , chemistry , alternative medicine , pathology , engineering , paleontology , sediment , biology
Organic semiconductor nanoparticle dispersions are electrostatically stabilized with the p‐doping agent 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane (F 4 TCNQ), omitting the need for surfactants. Smallest amounts of F 4 TCNQ stabilize poly(3‐hexylthiophene) dispersions and reduce the size of the nanoparticles significantly. The concept is then readily transferred to synthesize dispersions from a choice of light‐harvesting benzodithiophene‐based copolymers. Dispersions from the corresponding polymer:fullerene blends are used to fabricate organic solar cells (OSCs). In contrast to the widely used stabilizing surfactants, small amounts of F 4 TCNQ show no detrimental effect on the device performance. This concept paves the way for the eco‐friendly fabrication of OSCs from nanoparticle dispersions of high‐efficiency light‐harvesting semiconductors by eliminating environmentally hazardous solvents from the deposition process.