New Alternating Copolymers of 3,6-Carbazoles and Dithienylbenzothiadiazoles: Synthesis, Characterization, and Application in Photovoltaics
| Autor: | Nicolas Berton, Christophe Morell, Chiara Ottone, Vanessa Labet, Séverine Bailly, Frédéric Chandezon, André Grand, Saïd Sadki, Rémi de Bettignies |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Polymers and Plastics Organic solar cell Band gap 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences 7. Clean energy Polymer solar cell chemistry.chemical_compound Photovoltaics Polymer chemistry Materials Chemistry Thiophene Copolymer Physical and Theoretical Chemistry Carbazole business.industry Organic Chemistry Hybrid solar cell 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Optoelectronics 0210 nano-technology business |
| Zdroj: | Macromolecular Chemistry and Physics. 212:2127-2141 |
| ISSN: | 1022-1352 |
| Popis: | Three new low-bandgap copolymers containing 3,6-linked carbazole units are synthesized and characterized using a combination of spectroscopic and electrochemical techniques and DFT calculations. The electron-withdrawing effect of the BTD units leads to a significant decrease of the optical bandgap from 2.59 eV for PBTC to 1.81 eV for PCDTBT, whereas pendant octyl chains on the thiophene ring lead to an increase of the gap to 2.05 eV for PCDOTBT due to steric hindrance. PBTC:PCBM photovoltaic devices exhibit a PCE of 0.35% with an EQE reaching 35% in the blue region of the solar spectrum whereas PCDTBT:PCBM blends are efficient over a wider spectral range due to the lower bandgap of PCDTBT. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text