Low Energy Loss of 0.57 eV and High Efficiency of 8.80% in Porphyrin-Based BHJ Solar Cells
Abstract
A new A−π–D−π–A small molecule, denoted as MV72, has been designed and synthesized. The molecule comprises a Zn–porphyrin central donor unit and dicyanovinylene-substituted rhodanine (RhCN) end-capping acceptor units linked by bisthienylenevinylene groups as π-conjugated bridges. The optical and electrochemical properties of MV72 have been investigated as an electron donor for solution-processed organic solar cells (OSCs), and the results were compared to those of MV71, which consists of the same molecular backbone but with different rhodanine end-capping acceptor units. The effects of the end-capping terminal units on the absorption spectra, molecular crystallinity, frontier molecular energy levels, charge transport properties, morphology of active layers, and photovoltaic performance have been investigated. The OSCs based on optimized active layers of MV71 /PC 71 BM and MV72 /PC 71 BM (donor and acceptor weight ratios and solvent vapor annealing) deliver overall power conversion efficiencies (PCEs) of 7.61% and a remarkable 8.80%, respectively. MV72 /PC 71 BM showed impressively low energy loss, with a value as low as 0.57 eV; accordingly, a high open-voltage ( V OC ) of 0.88 V was achieved. The low energy loss in the MV72 -based OSCs is related to the increased dipole moment change for MV72, which in turn results in low exciton binding energy.
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The E23/PC71BM based device showed an impressively low energy loss, with a value as low as 0.57 eV; accordingly, a high open-voltage (Voc) of 0.88 V was achieved.
“The E23 /PC71BM based device showed an impressively low energy loss, with a value as low as 0.57 eV; accordingly, a high open-voltage ( V oc) of 0.88 V was achieved.”
From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [111]
The low energy loss in the E23-based OSC is related to the increased dipole moment change of E23, which in turn results in low exciton binding energy.
“The low energy loss in the E23 -based OSC is related to the increased dipole moment change of E23 , which in turn results in low exciton binding energy.”
From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [111]
The E23/PC71BM based device showed a PCE of 4.03% that is higher than that of E4/PC71BM (3.21%).
“The E23 /PC71BM based device showed a PCE of 4.03% that is higher than that of E4 /PC71BM (3.21%).”
From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [111]
This enhancement of the efficiency can be explained on the basis of good nanoscale morphology as indicated by high hole and electron mobilities for SVA treated devices.
“This enhancement of the e ffi ciency can be explained on the basis of good nanoscale morphology as indicated by high hole and electron mobilities for SVA treated devices.”
From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [111]
Cites
Arrechea, S., Aljarilla, A., de la Cruz, P., Palomares, E., Sharma, G. D., & Langa, F. (2016) · Nanoscale · doi:10.1039/c6nr06374h · Cited by 27 · see citing works
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Recent progress in porphyrin-based materials for organic solar cells
Mahmood, A., Hu, J.-Y., Xiao, B., Tang, A., Wang, X., & Zhou, E. (2018) · Journal of Materials Chemistry A · doi:10.1039/c8ta06392c · Cited by 311 · see citing works
- Authors
- Vartanian, M., Singhal, R., de la Cruz, P., Biswas, S., Sharma, G. D., & Langa, F.
- Affiliations
- University of Castilla-La Mancha (ES)
- Malaviya National Institute of Technology Jaipur (IN)
- Institute of Nanoscience, Nanotechnology and Molecular Materials (INAMOL), Universidad de Castilla-La Mancha, Campus de la Fábrica de Armas, 45071 Toledo, Spain
- LNM Institute of Information Technology (IN)
- Corresponding author
- Sharma, Ganesh D.
- Langa, Fernando
- Venue
- ACS Applied Energy Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-02-26
- Volume
- 1
- Issue
- 3
- Pages
- 1304-1315
- ISSN
- 2574-0962 (ISSN-L)
- OpenAlex
- W2791851070
- Cited by
- 19
- References
- 1
- Citations by year
- 2025: 2 · 2022: 2 · 2021: 3 · 2020: 3 · 2019: 4 · 2018: 5
- FWCI
- 1.43
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ACS Applied Energy Materials (publishedVersion)
- Funders
- Ministerio de Econom?a y Competitividad (CTQ2016-79189-R)
- Department of Science and Technology, Ministry of Science and Technology (DST/TMD/SERI/D05)
- Junta de Comunidades de Castilla-La Mancha (PEII-2014-014-P)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Photodynamic Therapy Research Studies
- Keywords
- organic solar cells, small molecule donor, porphyrins, zinc porphyrin, PC71BM, energy loss, open-circuit voltage, dipole moment, exciton binding energy, charge transport, active layer morphology, solvent vapor annealing
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