Hetero aromatic donors as effective terminal groups for DPP based organic solar cells
| Autor: | Akudari Ashok, Marri Anil Reddy, Abhishek Sharma, Ch. Pavan Kumar, Ganesh D. Sharma, Malapaka Chandrasekharam |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Electron mobility Organic solar cell Chemistry Carbazole General Chemical Engineering 02 engineering and technology General Chemistry Electron acceptor 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Acceptor Electrochemical energy conversion 0104 chemical sciences Solvent chemistry.chemical_compound 0210 nano-technology Phenoxazine |
| Zdroj: | RSC Advances. 6:9023-9036 |
| ISSN: | 2046-2069 |
| Popis: | Four new solution-processable donor–acceptor–donor (D–A–D) structured low bandgap small molecules (CSDPP5, CSDPP6, CSDPP7 and CSDPP8) with diketopyrrolopyrrole as central acceptor unit and phenoxazine (POZ) or carbazole (CBZ) as terminal units were designed, synthesized and characterized. The new small molecules have been employed as donors along with the PC71BM as electron acceptor in solution processed BHJ organic solar cells, showed broad absorption bands with suitable electrochemical energy levels. When the BHJ active layer was cast from THF solvent, the optimal power conversion efficiencies obtained with CSDPP5, CSDPP6, CSDPP7 and CSDPP8 are 2.97% 3.06%, 2.42% and 2.43% respectively. The PCE of the devices when processed with DIO/THF solvent, have been further enhanced to 4.69%, 4.14% for CSDPP6:PC71BM and CSDPP8:PC71BM active layers respectively. The enhancement in PCE has been attributed to change in nanoscale morphology and more balanced charge transport resulting from increased hole mobility. |
| Databáze: | OpenAIRE |
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