Interface-enhanced organic solar cells with extrapolated T80 lifetimes of over 20 years

Xu, Xiang; Xiao, Jingyang; Zhang, Guichuan; Wei, Long; Jiao, Xuechen; Yip, Hin‐Lap; Cao, Yong

doi:10.1016/j.scib.2019.10.019

Cited by 202 publications

(190 citation statements)

References 34 publications

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“…Most of the stability studies so far have been focused on fullerene‐based OSCs, [ 7–10 ] while for unstable NFA‐based OSCs, understanding of the degradation mechanism is still limited. For NFA‐based systems, promising photostability has been demonstrated for many‐systems including P3HT:IDTBR, [ 11 ] PCE10 with EH‐IDTBR, [ 12 ] or IEICO‐4F, [ 13 ] PffBT4T‐2OD:EH‐IDTBR, [ 14 ] single‐component devices [ 15 ] as well as ITIC derivatives. [ 4,16 ] However, studies up to date indicated that the light stability of NFA systems is strongly materials‐dependent.…”

Section: Figurementioning

confidence: 99%

Unraveling the Microstructure‐Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small‐Molecular Acceptors

et al. 2020

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As the power conversion efficiency (PCE) of organic solar cells (OSCs)has surpassed the 17% baseline, the long-term stability of highly efficient OSCs is essential for the practical application of this photovoltaic technology. Here, the photostability and possible degradation mechanisms of three state-of-the-art polymer donors with a commonly used nonfullerene acceptor (NFA), IT-4F, are investigated. The active-layer materials show excellent intrinsic photostability. The initial morphology, in particular the mixed region, causes degradation predominantly in the fill factor (FF) under illumination. Electron traps are formed due to the reorganization of polymers and diffusion-limited aggregation of NFAs to assemble small isolated acceptor domains under illumination. These electron traps lead to losses mainly in FF, which is in contradistinction to the degradation mechanisms observed for fullerene-based OSCs. Control of the composition of NFAs close to the thermodynamic equilibrium limit while keeping adequate electron percolation and improving the initial polymer and NFA ordering are of the essence to stabilize the FF in NFA-based solar cells, which may be the key tactics to develop next-generation OSCs with high efficiency as well as excellent stability.

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Section: Figurementioning

confidence: 99%

Unraveling the Microstructure‐Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small‐Molecular Acceptors

et al. 2020

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“…Single bulk heterojunction polymer solar cells (PSCs) have achieved dramatic progress through material evolution, device fabrication optimization and working mechanism exploration [1][2][3][4][5][6][7][8][9]. The power conversion efficiency (PCE) of PSCs has already exceeded 16% with narrow band gap nonfullerene material Y6 as acceptor [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Alloy-like ternary polymer solar cells with over 17.2% efficiency

et al. 2020

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“…[22] Herein we demonstrate the benefits of HTE and the selfdriving approach on the design of photostable material composites for OPV. While recently lifetimes of up to 10-20 years under continuous illumination in nitrogen atmosphere were reported, [23][24][25] photostability of OSC materials under the influence of oxygen and moisture is a critical challenge. Currently available encapsulation films for OPV materials are a major cost factor of the final product while their water vapor transmission rate is typically 10 −3 g (m 2 day) −1 .…”

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confidence: 99%

Beyond Ternary OPV: High‐Throughput Experimentation and Self‐Driving Laboratories Optimize Multicomponent Systems

et al. 2020

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Fundamental advances to increase the efficiency as well as stability of organic photovoltaics (OPVs) are achieved by designing ternary blends, which represents a clear trend toward multicomponent active layer blends. The development of high‐throughput and autonomous experimentation methods is reported for the effective optimization of multicomponent polymer blends for OPVs. A method for automated film formation enabling the fabrication of up to 6048 films per day is introduced. Equipping this automated experimentation platform with a Bayesian optimization, a self‐driving laboratory is constructed that autonomously evaluates measurements to design and execute the next experiments. To demonstrate the potential of these methods, a 4D parameter space of quaternary OPV blends is mapped and optimized for photostability. While with conventional approaches, roughly 100 mg of material would be necessary, the robot‐based platform can screen 2000 combinations with less than 10 mg, and machine‐learning‐enabled autonomous experimentation identifies stable compositions with less than 1 mg.

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Interface-enhanced organic solar cells with extrapolated T80 lifetimes of over 20 years

Cited by 202 publications

References 34 publications

Unraveling the Microstructure‐Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small‐Molecular Acceptors

Unraveling the Microstructure‐Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small‐Molecular Acceptors

Alloy-like ternary polymer solar cells with over 17.2% efficiency

Beyond Ternary OPV: High‐Throughput Experimentation and Self‐Driving Laboratories Optimize Multicomponent Systems

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Interface-enhanced organic solar cells with extrapolated T80 lifetimes of over 20 years

Cited by 202 publications

References 34 publications

Unraveling the Microstructure‐Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small‐Molecular Acceptors

Unraveling the Microstructure‐Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small‐Molecular Acceptors

Alloy-like ternary polymer solar cells with over 17.2% efficiency

Beyond Ternary OPV: High‐Throughput Experimentation and Self‐Driving Laboratories Optimize Multicomponent Systems

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Interface-enhanced organic solar cells with extrapolated T80 lifetimes of over 20 years