Synthesis of Conjugated Polymers
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2013
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ndltd-OhioLink-oai-etd.ohiolink.edu-akron13627835012021-08-03T05:20:49Z Synthesis of Conjugated Polymers Wang, Chao Polymer Chemistry Conjugated Polymer Graphene Nanoribbon Organic Soalr Cells Conjugated polymers (CPs) are a unique class of materials because they possess the electronic properties of semi-conductors and processability of polymers. Their electronic and optical properties can be controlled by their chemical structures and conjugation length.To enhance the electron affinity of CPs, a series of boron-containing CPs were synthesized with arylene-borylene units. One of the boron-containing polymer had indeed shown the ability of quenching the photoluminescence of poly(3-hexylthiophene) (P3HT), indicating possible exciton separation and charge transfer.Next, a ketone group was introduced to polythiophene to lower its LUMO level and increase the electron affinity. Regioregular poly(3-heptanoylthiophene) (PHOT) was synthesized. The polymerization was realized by Ni-catalyzed Kumada coupling with a chain-growth mechanism. Schlenk equilibrium played a key role in the generation of the monomer for the polymerization. PHOT was fully characterized by various techniques. However, only p-channel activity was observed in field-effect transistors (FETs) for PHOT. The hole mobility was one order lower than that of P3HT. Photovoltaic devices with an active layer of 1:1 blend of PHOT and PC71BM had a low power conversion efficiency of ~0.5%.Finally, the synthesis of graphene nanoribbons (GNRs) was attempted which could be potentially used as a good charge carrier. To prevent intramolecular and intermolecular side reactions during Scholl reaction, the precursors, oligo-naphthalenes with alkoxy groups capping the 2, 3, 6, and 7-positions had been synthesized. Intramolecular ring fusion via the Scholl reations was tested, but no expected GNRs were formed. 2013-05-14 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1362783501 http://rave.ohiolink.edu/etdc/view?acc_num=akron1362783501 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Polymer Chemistry Conjugated Polymer Graphene Nanoribbon Organic Soalr Cells |
| spellingShingle |
Polymer Chemistry Conjugated Polymer Graphene Nanoribbon Organic Soalr Cells Wang, Chao Synthesis of Conjugated Polymers |
| author |
Wang, Chao |
| author_facet |
Wang, Chao |
| author_sort |
Wang, Chao |
| title |
Synthesis of Conjugated Polymers |
| title_short |
Synthesis of Conjugated Polymers |
| title_full |
Synthesis of Conjugated Polymers |
| title_fullStr |
Synthesis of Conjugated Polymers |
| title_full_unstemmed |
Synthesis of Conjugated Polymers |
| title_sort |
synthesis of conjugated polymers |
| publisher |
University of Akron / OhioLINK |
| publishDate |
2013 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=akron1362783501 |
| work_keys_str_mv |
AT wangchao synthesisofconjugatedpolymers |
| _version_ |
1719418518134325248 |