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Key Parameters Requirements for Non-Fullerene-Based Organic Solar Cells with Power Conversion Efficiency20
- Source :
- Advanced Science, Advanced science, 6(9):1802028. Wiley-VCH Verlag GmbH & Co. KGaA
- Publication Year :
- 2018
-
Abstract
- The reported power conversion efficiencies (PCEs) of nonfullerene acceptor (NFA) based organic photovoltaics (OPVs) now exceed 14% and 17% for single‐junction and two‐terminal tandem cells, respectively. However, increasing the PCE further requires an improved understanding of the factors limiting the device efficiency. Here, the efficiency limits of single‐junction and two‐terminal tandem NFA‐based OPV cells are examined with the aid of a numerical device simulator that takes into account the optical properties of the active material(s), charge recombination effects, and the hole and electron mobilities in the active layer of the device. The simulations reveal that single‐junction NFA OPVs can potentially reach PCE values in excess of 18% with mobility values readily achievable in existing material systems. Furthermore, it is found that balanced electron and hole mobilities of >10−3 cm2 V−1 s−1 in combination with low nongeminate recombination rate constants of 10−12 cm3 s−1 could lead to PCE values in excess of 20% and 25% for single‐junction and two‐terminal tandem OPV cells, respectively. This analysis provides the first tangible description of the practical performance targets and useful design rules for single‐junction and tandem OPVs based on NFA materials, emphasizing the need for developing new material systems that combine these desired characteristics.
- Subjects :
- Fullerene
Materials science
Organic solar cell
General Chemical Engineering
numerical device simulations
Recombination rate
General Physics and Astronomy
Medicine (miscellaneous)
02 engineering and technology
010402 general chemistry
01 natural sciences
Biochemistry, Genetics and Molecular Biology (miscellaneous)
tandem devices
drift‐diffusion model
General Materials Science
bulk‐heterojunction solar cells
5th Anniversary Article
Tandem
Full Paper
business.industry
Energy conversion efficiency
General Engineering
Material system
Full Papers
021001 nanoscience & nanotechnology
Acceptor
0104 chemical sciences
Active layer
nonfullerene acceptors
Optoelectronics
organic photovoltaics
0210 nano-technology
business
Subjects
Details
- ISSN :
- 21983844
- Volume :
- 6
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Advanced science (Weinheim, Baden-Wurttemberg, Germany)
- Accession number :
- edsair.doi.dedup.....0e160bb0b6c0ad8bed40ad1e2ecb91b6