In the field of organic solar technology, there are two main problems, the stability of materials and the low power efficiency. By analyzing the power efficiency of organic solar cells, we can infer that efficiency of absorption and charge mobility are the key factors to these two problems.
In this study, we focus on coupling carbazole with different low bandgap moieties. By using Suzuki Coupling, we synthesized new conjugated polymers with main chain structures of D-A sequence. It turns out that the copolymer can form a strong intramolecular charge transfer (ICT). We¡¦ve successfully synthesized two new low bandgap copolymers with D-A sequence, PCAMDT and PCAMDP.
These two copolymers show us excellent thermal stabilities with
decomposition temperature of 320¢Jand 355¢J,respectively.According to
UV-Vis absorption spectrum, PCAMDT and PCAMDP own bandgaps at
1.85 eV and 2.22eV,respectively. Electrochemical analysis reveals that
the HOMO and LUMO level of PCAMDT are found to be -5.69eV and
-3.77eV,repectively, while the HOMO and LUMO level of
PCAMDP are -5.87eV and -3.75eV. These properties make PCAMDT
and PCAMDP advantageous materials while applied as high absorbing
layers of organic solar cells.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0723112-165216 |
| Date | 23 July 2012 |
| Creators | Chang, Ke-ming |
| Contributors | Wen-yao Huang, Ko-shan Ho, Mei-ying Chang, Yu-kai Han, Li-yin Chen |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723112-165216 |
| Rights | user_define, Copyright information available at source archive |
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