1,5-Diiodocycloctane: a cyclane solvent additive that can extend the exciton diffusion length in thick film organic solar cells

Sun, Fengbo; Zheng, Xufan; Hu, Tianyu; Wu, Jingnan; Wan, Ming; Xiao, Yuanyuan; Cong, Tingting; Li, Yuda; Xiao, Biao; Shan, Juan; Wang, Ergang; Wang, Xunchang; Yang, Renqiang

doi:10.1039/d3ee04281b

Cited by 22 publications

(4 citation statements)

References 76 publications

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“…In addition, a series of tests were examined to evaluate the morphology of gradient-blended active layers with or without ZY-4Cl. First, we utilized atomic force microscopy (AFM) to directly observe the surface morphology and roughness of different films. , The AFM height images are depicted in Figure a–f. The root-mean-square (RMS) roughness values of D18-Cl, Y6, ZY-4Cl, and Y6:ZY-4Cl (Figure S4) were 0.874 7.15, 0.556, and 5.41 nm.…”

Section: Resultsmentioning

confidence: 99%

High-Efficiency Ternary Polymer Solar Cells with a Gradient-Blended Structure Fabricated by Sequential Deposition

Jin,

Wang,

Shen

et al. 2024

ACS Appl. Mater. Interfaces

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Acquiring the ideal blend morphology of the active layer to optimize charge separation and collection is a constant goal of polymer solar cells (PSCs). In this paper, the ternary strategy and the sequential deposition process were combined to make sufficient use of the solar spectrum, optimize the energy-level structure, regulate the vertical phase separation morphology, and ultimately enhance the power conversion efficiency (PCE) and stability of the PSCs. Specifically, the donor and acceptor illustrated a gradient-blended distribution in the sequential deposition-processed films, thus resulting in facilitated carrier characteristics in the gradient-blended devices. Consequently, the PSCs based on D18-Cl/Y6:ZY-4Cl have achieved a device efficiency of over 18% with the synergetic improvement of open-circuit voltage (V OC), short-circuit current density (J SC), and fill factor (FF). Therefore, this work reveals a facile approach to fabricating PSCs with improved performance and stability.

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Section: Resultsmentioning

confidence: 99%

High-Efficiency Ternary Polymer Solar Cells with a Gradient-Blended Structure Fabricated by Sequential Deposition

Jin,

Wang,

Shen

et al. 2024

ACS Appl. Mater. Interfaces

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“…Hence, the exciton diffusion length was doubled. Thus, even the thicker (110 nm) organic SCs showed high performance up to 19.1% [147]. Fu et al utilizes polymer adsorption strategy to extend diffusion length by effectively suppressing defects.…”

Section: Current State-of-the-art Advancements Towards Diffusion Leng...mentioning

confidence: 99%

A comprehensive review on potential of diffusion length enhancement to upraise perovskite solar cell performance

Bagade,

Patel

2024

Phys. Scr.

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To achieve efficient solar cells, an in-depth review on significance of diffusion length enhancement is presented in this research work. We have focused on globally-adopted strategy of increasing diffusion length. The experimental pathways followed by various researchers to realize this strategy are deeply explored in this paper. The total of nine key-parameters that control and facilitate diffusion length enhancement are identified. Moreover, total of four parameters which are primarily influenced by diffusion length enhancement are listed. The underlying cause-&-effect mechanism pertaining to each parameter is discussed in-depth in this article. Furthermore, the comparison is performed between impact of electron and hole diffusion length enhancement on the device performance. The way to potentially implement this study for appropriate absorber layer selection is presented. Finally, a comparative study is performed on extent of influence of diffusion length enhancement technique to that of the band-offset optimization technique to achieve higher device performance. This rigorous analysis leads to discovery of the fact that diffusion length enhancement raises solar cell efficiency seven times as compared to that obtained by band offset optimization. Hence, significance of diffusion length enhancement for the pinnacle performance of solar cell is vividly revealed in this paper.

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“…Straightforward modification on the commercial PEDOT:PSS has become one of the most effective strategies . In this regard, various polar solvents and surfactants have been used for modifying the surface of the PEDOT:PSS pure film. − Additionally, direct introduction of different species into the PEDOT:PSS aqueous solution also plays an important role, involving organic and inorganic ones, among which the polyoxometalates emerge as the feasible and effective one. − On the other hand, other types of conducting polymers have been exploited as well, such as polyaniline, , polypyrrole (PPy), , etc. In a report by Liao, the electrodeposited PPy:PSS as the interlayer exhibited extremely weak corrosion on the ITO electrode .…”

Section: Introductionmentioning

confidence: 99%

Polypyrrole-Decorated Hybrid Anode Interlayer for Enhancing Efficiency and Stability of Non-Fullerene Solar Cells

Zhang,

Chen

2024

ACS Appl. Polym. Mater.

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The development of a superior anode interlayer (AIL) has proved to be key to improving the efficiency and stability of organic solar cells (OSCs). In this work, conducting polypyrrole composite PPy:PMA was exploited to modify the commercially available PEDOT:PSS. With a small amount of PPy:PMA to dope PEDOT:PSS, the device efficiency for the PM6:L8-BO blend film can be improved from 17.7% for the pure PEDOT:PSS to 18.2% for the hybrid AIL. The enhanced performance can be attributed to better match energy levels between the electrode and the active layer, reduction on contact resistance, the inhibition of charge recombination, and increase in the electric conductivity of the AIL. In addition, compared with the devices with pure PEDOT:PSS, the devices based on the hybrid AIL exhibit better photostability and thermal stability. Collectively, our work demonstrates that a synergistic hybrid anode interlayer has great advantages in improving the performance and long-term stability of OSCs.

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1,5-Diiodocycloctane: a cyclane solvent additive that can extend the exciton diffusion length in thick film organic solar cells

Abstract: The short exciton diffusion length associated with most state-of-art organic semiconductors used in organic solar cells (OSCs) imposes severe limits on the exciton transport in the larger donor/acceptor domains and...

Cited by 22 publications

References 76 publications

High-Efficiency Ternary Polymer Solar Cells with a Gradient-Blended Structure Fabricated by Sequential Deposition

High-Efficiency Ternary Polymer Solar Cells with a Gradient-Blended Structure Fabricated by Sequential Deposition

A comprehensive review on potential of diffusion length enhancement to upraise perovskite solar cell performance

Polypyrrole-Decorated Hybrid Anode Interlayer for Enhancing Efficiency and Stability of Non-Fullerene Solar Cells

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