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Synthesis and Characterization of Poly(3‐Hexylthiophene) for Organic Solar Cells
Author(s) -
Silva Santos Bianca Pedroso,
Rubio Arias Jose Jonathan,
de Fátima Vieira Marques Maria,
de Melo Furtado Jose Geraldo,
Silva Luiz Alberto,
Simão Renata Antoun
Publication year - 2019
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201700078
Subject(s) - dispersity , polymer , molar mass , monomer , materials science , catalysis , chloroform , thermal stability , polymer chemistry , chemical engineering , morphology (biology) , molar ratio , band gap , characterization (materials science) , nanotechnology , chemistry , organic chemistry , composite material , optoelectronics , biology , engineering , genetics
Poly(3‐hexylthiophene) (P3HT) has been successfully synthesized through McCullough route. The influence of nickel catalyst content on molar mass ( M n and M w ), dispersity (Đ), regioregularity (rr), as well as optical, thermal, and morphological properties is systematically investigated. The results evidence that polymer dispersities are narrow, M n and rr values decrease with the augmentation of catalyst content. Polymer solution in different solvents (chloroform and dichlorobenzene) show similar optical band gaps. Solid state band gap of obtained material is lower than in solution, which confirms the reorganization of polymer chains in solid state. Both polymers show good thermal stability and their morphologies are tightly influenced by the monomer/catalyst ratio in the synthesis. Two main morphologies are obtained, for the higher molar mass P3HT it is nodule‐like, while the lower M n presented rod form. The fore polymer combined with PCMB results in lower root mean square (RMS) indicating smoother morphology, which is more appropriate for solar cells application.