Back to Search
Start Over
Reducing Energy Loss in Organic Solar Cells by Changing the Central Metal in Metalloporphyrins
- Source :
- ChemSusChem. 14(17)
- Publication Year :
- 2020
-
Abstract
- The effect of central donor core on the properties of A-π-D-π-A donors, where D is a porphyrin macrocycle, cyclopenta[2,1-b:3,4-b']dithiophene is the π bridge, and A is a dicyanorhodanine terminal unit, was investigated for the fabrication of the organic solar cells (OSCs), along [6,6]-phenyl-C71-butyric acid methyl ester (PC71 BM) as electron acceptor. A new molecule consisting of Ni-porphyrin central donor core (VC9) showed deep HOMO energy level and OSCs based on optimized VC9:PC71 BM realized overall power conversion efficiency (PCE) of 10.66 % [short-circuit current density (JSC )=15.48 mA/cm2 , fill factor (FF)=0.65] with high open circuit voltage (VOC ) of 1.06 V and very low energy loss of 0.49 eV, whereas the Zn-porphyrin analogue VC8:PC71 BM showed PCE of 9.69 % with VOC of 0.89 V, JSC of 16.25 mA/cm2 and FF of 0.67. Although the OSCs based on VC8 showed higher JSC in comparison to VC9, originating from the broader absorption profile of VC8 that led to more exciton generation, the higher value of PCE of VC9 is owing to the higher VOC and reduced energy loss.
- Subjects :
- chemistry.chemical_classification
Materials science
Organic solar cell
Open-circuit voltage
General Chemical Engineering
Exciton
Energy conversion efficiency
02 engineering and technology
Electron acceptor
010402 general chemistry
021001 nanoscience & nanotechnology
Photochemistry
01 natural sciences
Porphyrin
0104 chemical sciences
chemistry.chemical_compound
General Energy
chemistry
Environmental Chemistry
Molecule
General Materials Science
0210 nano-technology
Absorption (electromagnetic radiation)
Subjects
Details
- ISSN :
- 1864564X
- Volume :
- 14
- Issue :
- 17
- Database :
- OpenAIRE
- Journal :
- ChemSusChem
- Accession number :
- edsair.doi.dedup.....06ea4f303032e184a871b90b66312dcd