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High-efficiency organic solar cells with low non-radiative recombination loss and low energetic disorder
- Source :
- Nature Photonics. 14:300-305
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- Energy loss within organic solar cells (OSCs) is undesirable as it reduces cell efficiency1–4. In particular, non-radiative recombination loss3 and energetic disorder5, which are closely related to the tail states below the band edge and the overall photon energy loss, need to be minimized to improve cell performance. Here, we report how the use of a small-molecule acceptor with torsion-free molecular conformation can achieve a very low degree of energetic disorder and mitigate energy loss in OSCs. The resulting single-junction OSC has an energy loss due to non-radiative recombination of just 0.17 eV and a high power conversion efficiency of up to 16.54% (certified as 15.89% by the National Renewable Energy Laboratory). The findings take studies of organic photovoltaics deeper into a new regime, beyond the limits of energetic disorder and large energy offset for charge generation. An organic solar cell designed with minimal energetic disorder exhibits very low energy loss due to non-radiative recombination and highly efficient operation.
- Subjects :
- Materials science
Organic solar cell
business.industry
Energy conversion efficiency
02 engineering and technology
Photon energy
021001 nanoscience & nanotechnology
01 natural sciences
Acceptor
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Renewable energy
010309 optics
Charge generation
0103 physical sciences
Optoelectronics
0210 nano-technology
business
Recombination
Non-radiative recombination
Subjects
Details
- ISSN :
- 17494893 and 17494885
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- Nature Photonics
- Accession number :
- edsair.doi...........5c33d6cd374be5e8cc86e8610dafb7f4