Industrial viability of single-component organic solar cells

He, Yakun; Li, Ning; Heumüller, Thomas; Wortmann, Jonas; Hanisch, Benedict; Aubele, Anna; Lucas, Sebastian; Feng, Guitao; Jiang, Xudong; Li, Weiwei; Bäuerle, Peter; Brabec, Christoph J.

doi:10.1016/j.joule.2022.05.008

Cited by 52 publications

(45 citation statements)

References 58 publications

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“…Though single‐component organic solar cells (OSCs) are with good mechanical and operational stability, compared to traditional donor‐acceptor bulk‐heterojunction (BHJ) OSCs, their best power conversion efficiency (PCE) is lagged far behind (10% vs. 19%), seriously limiting the prospect. [ 1‐15 ] Recently, block copolymer based OSCs have drawn great attention from the field for breaking the efficiency bottleneck. [ 16‐20 ] Even the claim of single‐ component for this kind of systems is still challenged, block copolymer based OSCs still realize some progress in pursuing photovoltaic performance.…”

Section: Background and Originality Contentmentioning

confidence: 99%

A Two‐in‐One Annealing Enables Dopant Free Block Copolymer Based Organic Solar Cells with over 16% Efficiency

et al. 2023

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The organic solar cells (OSCs) based on block copolymer systems bear the hope of achieving the optimal balance of power conversion efficiency (PCE) and stability, but the key index, PCE of this type devices is still low. To improve the efficiency, regulating the thin-film morphology is always the core engineering, which is usually achieved via two aspects: precursor optimization and post treatments. Herein, we extend our previous success in post treatments (two step annealing) to a novel two-in-one annealing tactic, which realizes limited phase separation and well-connected domain distribution. As a result, the optimal PCE as high as 16.08%, representing the cutting-edge level of block copolymer based OSCs (notably dopant free). Furthermore, a comprehensive study on all kinds of annealing methods is carried out, including TA, SVA, SVA+TA, TA+SVA and SVTA (the best one), and an in-depth understanding is demonstrated, with the help of different characterizations.

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Section: Background and Originality Contentmentioning

confidence: 99%

A Two‐in‐One Annealing Enables Dopant Free Block Copolymer Based Organic Solar Cells with over 16% Efficiency

et al. 2023

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“…However, the structure modifications of NFAs also need to consider the effect on the long-term stability of the corresponding OPV devices, since the molecular planarity and aggregation behavior of NFAs are strongly related to the morphology evolution of relevant bulk hetero-junction (BHJ) under external stresses. − It is believed that the steric hinderance of alkyl chains has significant influence on the molecular backbone geometries, affecting the aggregation behavior of NFAs and the photovoltaic performance and stability of corresponding solar cell devices. − Therefore, it is possible to acquire a high-performance and stable solar cell simultaneously by introducing bulky conjugated side-groups on NFAs with subtly modified local structures.…”

Section: Introductionmentioning

confidence: 99%

Correlation of Local Isomerization Induced Lateral and Terminal Torsions with Performance and Stability of Organic Photovoltaics

et al. 2023

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Organic photovoltaics (OPVs) have achieved great progress in recent years due to delicately designed non-fullerene acceptors (NFAs). Compared with tailoring of the aromatic heterocycles on the NFA backbone, the incorporation of conjugated side-groups is a cost-effective way to improve the photoelectrical properties of NFAs. However, the modifications of side-groups also need to consider their effects on device stability since the molecular planarity changes induced by side-groups are related to the NFA aggregation and the evolution of the blend morphology under stresses. Herein, a new class of NFAs with local-isomerized conjugated side-groups are developed and the impact of local isomerization on their geometries and device performance/stability are systematically investigated. The device based on one of the isomers with balanced side- and terminal-group torsion angles can deliver an impressive power conversion efficiency (PCE) of 18.5%, with a low energy loss (0.528 V) and an excellent photo- and thermal stability. A similar approach can also be applied to another polymer donor to achieve an even higher PCE of 18.8%, which is among the highest efficiencies obtained for binary OPVs. This work demonstrates the effectiveness of applying local isomerization to fine-tune the side-group steric effect and non-covalent interactions between side-group and backbone, therefore improving both photovoltaic performance and stability of fused ring NFA-based OPVs.

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“…Organic solar cell (OSC) technology, as a promising type of photovoltaic (PV), shall be readily prepared for further commercialization once the device performance appeals the market’s requirement, which mainly relies on the quality of the active layer and charge transport layer. − By optimizing both of them, the power conversion efficiency (PCE), key factor of device performance, has reached 19% in several cases. − These exciting progresses usually require tremendous chemistry input or complex device engineering, so some simple yet effective ways to optimize the cast layers for OSCs are desired.…”

Section: Introductionmentioning

confidence: 99%

Simple Solvent Treatment Enabled Improved PEDOT:PSS Performance toward Highly Efficient Binary Organic Solar Cells

et al. 2022

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PEDOT:PSS is the most popular hole-transporting material (HTM) for conventional structural organic solar cell (OSC) devices, whose performance is of great importance for realizing high power conversion efficiency (PCE). However, its performance in OSC devices has been continuously challenged by various replacing materials and different doping strategies, for better conductivity, work function, and surface property. Here, we report a simple dopant-free method to tune the phase separation of the PEDOT:PSS layer, which results in better charge transport and extraction in devices. Specifically, high PCEs for binary polymersmall-molecule (>18%) and polymer−polymer (>17%) systems are simultaneously achieved. This work engineeringly provides encouraging improvement for OSC device performance with easy modification and scientifically offers insights into tuning the property of the PEDOT:PSS layer.

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Industrial viability of single-component organic solar cells

Cited by 52 publications

References 58 publications

A Two‐in‐One Annealing Enables Dopant Free Block Copolymer Based Organic Solar Cells with over 16% Efficiency

A Two‐in‐One Annealing Enables Dopant Free Block Copolymer Based Organic Solar Cells with over 16% Efficiency

Correlation of Local Isomerization Induced Lateral and Terminal Torsions with Performance and Stability of Organic Photovoltaics

Simple Solvent Treatment Enabled Improved PEDOT:PSS Performance toward Highly Efficient Binary Organic Solar Cells

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