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Effect of the Side Chain Functionality of the Conjugated Polyelectrolytes as a Cathode Interlayer Material on the Photovoltaic Performances

Effect of the Side Chain Functionality of the Conjugated Polyelectrolytes as a Cathode Interlayer... The quaternized conjugated polymer based on poly[(9,9-bis(3′-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dihexylfluorene)] (PFN) as cathode interlayer material (CIM) in a polymer solar cell was systematically investigated. The interlayer consists of alternating dihexyl fluorene and dimethyl aminopropyl fluorene backbone. The corresponding quaternized conjugated polyelectrolytes, named PFN salt and PFN-OH salt, were synthesized by introducing quaternized agents, such as bromoethane or bromoethanol, as side chains onto the PFN precursor polymer. Different quaternized agents give the different inducing effects of an interfacial dipole. The structure of inverted polymer solar cells (iPSCs) is ZnO/interlayer/PTB7-Th:PC71BM/MoO3/Ag. The enhancement in the efficiency of the iPSCs was accomplished by introducing a PFN, PFN salt, and PFN-OH salt as the CIM. Modification of side-chain functionality with bromoethanol shows better performances than that with bromoethane as an interlayer.[graphic not available: see fulltext] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Macromolecular Research Springer Journals

Effect of the Side Chain Functionality of the Conjugated Polyelectrolytes as a Cathode Interlayer Material on the Photovoltaic Performances

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Publisher
Springer Journals
Copyright
Copyright © The Polymer Society of Korea and Springer 2021
ISSN
1598-5032
eISSN
2092-7673
DOI
10.1007/s13233-022-0011-2
Publisher site
See Article on Publisher Site

Abstract

The quaternized conjugated polymer based on poly[(9,9-bis(3′-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dihexylfluorene)] (PFN) as cathode interlayer material (CIM) in a polymer solar cell was systematically investigated. The interlayer consists of alternating dihexyl fluorene and dimethyl aminopropyl fluorene backbone. The corresponding quaternized conjugated polyelectrolytes, named PFN salt and PFN-OH salt, were synthesized by introducing quaternized agents, such as bromoethane or bromoethanol, as side chains onto the PFN precursor polymer. Different quaternized agents give the different inducing effects of an interfacial dipole. The structure of inverted polymer solar cells (iPSCs) is ZnO/interlayer/PTB7-Th:PC71BM/MoO3/Ag. The enhancement in the efficiency of the iPSCs was accomplished by introducing a PFN, PFN salt, and PFN-OH salt as the CIM. Modification of side-chain functionality with bromoethanol shows better performances than that with bromoethane as an interlayer.[graphic not available: see fulltext]

Journal

Macromolecular Research – Springer Journals

Published: Feb 1, 2022

Keywords: conjugated polyelectrolyte; cathode interlayer material; photovoltaic

References