Deep Absorbing Porphyrin Small Molecule for High-Performance Organic Solar Cells with Very Low Energy Losses
Abstract
We designed and synthesized the DPPEZnP-TEH molecule, with a porphyrin ring linked to two diketopyrrolopyrrole units by ethynylene bridges. The resulting material exhibits a very low energy band gap of 1.37 eV and a broad light absorption to 907 nm. An open-circuit voltage of 0.78 V was obtained in bulk heterojunction (BHJ) organic solar cells, showing a low energy loss of only 0.59 eV, which is the first report that small molecule solar cells show energy losses <0.6 eV. The optimized solar cells show remarkable external quantum efficiency, short circuit current, and power conversion efficiency up to 65%, 16.76 mA/cm(2), and 8.08%, respectively, which are the best values for BHJ solar cells with very low energy losses. Additionally, the morphology of DPPEZnP-TEH neat and blend films with PC61BM was studied thoroughly by grazing incidence X-ray diffraction, resonant soft X-ray scattering, and transmission electron microscopy under different fabrication conditions.
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D5 is a low band-gap (1.37 eV) DPP-based donor that showed broad light absorption up to 907 nm and a Voc of 0.78 V with energy losses <0.6 eV.
“a low band-gap (1.37 eV) DPPbased donor of D5 (Fig. 12) that showed a broad light absorption up to 907 nm and a V oc of 0.78 V with energy losses < 0.6 eV.”
From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [89]
The optimized D5 device showed an EQE up to 65%, a Jsc of 16.76 mA cm−2 and a PCE of 8.08%.
“The optimized device showed an EQE of up to 65%, a J sc of 16.76 mA cm 2 and a PCE of 8.08%, respectively.”
From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [89]
The ternary device with D5 showed a hole mobility of 3.41×10-3 cm2 V-1 s-1, much higher than the PTB7 binary control without D5 (8.86×10-4 cm2 V-1 s-1).
“The ternary device showed a hole mobility of 3.41 -10 3 cm 2 V 1 s 1 , which is much higher than that for the PTB7 binary control device without D5 (8.86 -10 4 cm 2 V 1 s 1 ).”
From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [89]
Synergic optimization of electronic properties and light absorption is responsible for high performances of ternary OSCs.
“In sum, the synergic optimization of electronic properties and light absorption is responsible for high performances of ternary OSCs. 89”
From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [89]
D5 in combination with PTB7 and PC71BM in ternary OSCs achieved a high efficiency of 11.03%, resulting from higher Jsc and FF.
“A high e ffi ciency of 11.03% resulted from higher values of the J sc and FF.”
From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [89]
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- Authors
- Gao, K., Li, L., Lai, T., Xiao, L., Huang, Y., Huang, F., Peng, J., Cao, Y., Liu, F., Russell, T. P., Janssen, R. A. J., & Peng, X.
- Affiliations
- State Key Laboratory of Luminescent Materials and Devices (CN)
- Lawrence Berkeley National Laboratory (US)
- Eindhoven University of Technology (NL)
- Corresponding author
- Liu, Feng
- Janssen, René A. J.
- Peng, Xiaobin
- ORCID
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-06-08
- Volume
- 137
- Issue
- 23
- Pages
- 7282-7285
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2343357564
- Cited by
- 455
- References
- 0
- Citations by year
- 2026: 7 · 2025: 7 · 2024: 10 · 2023: 14 · 2022: 18 · 2021: 40 · 2020: 58 · 2019: 81 · 2018: 50 · 2017: 77 · 2016: 76 · 2015: 17
- FWCI
- 35.31
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the American Chemical Society (publishedVersion)
- PubMed (publishedVersion)
- TU/e Research Portal (submittedVersion)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- Funders
- U.S. Department of Energy, Office of Basic Energy Sciences (DE-SC0001087)
- the Ministry of Science and Technology (2014CB643500)
- International Science & Technology Cooperation Program of China (2013DFG52740, 2010DFA52150)
- the National Natural Science Foundation of China (51473053, 51073060)
- 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, porphyrins, diketopyrrolopyrrole, small molecule donor, energy loss, open-circuit voltage, band gap, bulk heterojunction, PC61BM, blend morphology, power conversion efficiency
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