Blending isomers of fluorine-substituted sulfonyldibenzene as hole transport materials to achieve high efficiency beyond 21% in perovskite solar cells

Yang, Yang; Ryu, Seung Un; Wu, Fei; Lu, Huiqiang; Jia, Kangkang; Zhong, Cheng; Park, Jin Young; Zhu, Linna

doi:10.1016/j.cej.2021.130396

Cited by 32 publications

(15 citation statements)

References 47 publications

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“…Larger hole mobility facilitates more efficient charge separation and transporting, thus increasing photocurrent density to obtain higher J sc . The higher FF of HY4 corresponds to its faster hole transfer. , In addition, the slightly lower V oc of H101-based devices can be attributed to its higher HOMO level than HY4.…”

Section: Results and Discussionmentioning

confidence: 98%

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Pyrene Core-based Dopant-free Hole Transporting Materials for Perovskite Solar Cells: A Theoretical Design and Experimental Verification

Liu

Qian

et al. 2021

J. Phys. Chem. C

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Hole transport materials (HTMs) are an indispensable part of perovskite solar cells (PSCs), and the role of HTMs in improving the performance of PSCs is worth highlighting. In this work, an efficient triphenylamine-based HTM (HY4) is constructed by introducing a fused aromatic core. Theoretical calculated results reveal that the introduced pyrene core in HY4 with a better planarity than the parental HTM (H101) is conducive to promote the intermolecular π−π stacking and reduce the reorganization energy in the hole transferring process. Experimental characterization further confirms that HY4 exhibits matched energy levels, high hole mobility, smooth film morphology, and extraordinary hole extraction ability. Therefore, dopant-free HY4-based PSC devices can achieve a higher power conversion efficiency of 16.62% than a dopant-free H101-based device (14.92%). This work demonstrates that incorporating a fused aromatic core in HTMs is a promising strategy to improve device performance.

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Section: Results and Discussionmentioning

confidence: 98%

“…The higher FF of HY4 corresponds to its faster hole transfer. 64,65 In addition, the slightly lower V oc of H101-based devices can be attributed to its higher HOMO level than HY4.…”

Section: Resultsmentioning

confidence: 99%

Pyrene Core-based Dopant-free Hole Transporting Materials for Perovskite Solar Cells: A Theoretical Design and Experimental Verification

Liu

Qian

et al. 2021

J. Phys. Chem. C

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“…These morphological disparities result in the fluorene and phenyl groups of Spiro- m F adsorbing much closer to the perovskite surface, stacking in layers and yielding much greater charge transport. Recently, studies have also shown promising results of blending two fluorinated isomers as HTM . The two isomers must first demonstrate good compatibility when mixed, the result of which is improved hole mobility and hole extraction ability.…”

Section: Hole Transporting Materials (Htms)mentioning

confidence: 99%

“…Recently, studies have also shown promising results of blending two fluorinated isomers as HTM. 60 The two isomers must first demonstrate good compatibility when mixed, the result of which is improved hole mobility and hole extraction ability. Considering these effects, fluorination with controlled isomerism is a potential strategy to further tune the performance of the HTM.…”

Section: Conceptual Roadmap For Molecular Design Of Octmmentioning

confidence: 99%

Configurable Organic Charge Carriers toward Stable Perovskite Photovoltaics

et al. 2022

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Due to their solution processability and unique photoelectric characteristics, perovskite solar cells (PSCs) have shown considerable promise in the area of renewable energy. Although their power conversion efficiency (PCE) has risen from 3.8% to 25.7% in only a few years, their short lifetime and high material prices continue to be key roadblocks to commercial viability. Charge transporting materials (CTMs), such as hole/electron transporting materials, are critical components in PSCs because they not only govern hole or electron extraction and transporting from the perovskite layer to the electrodes but also protect the perovskite from direct contact with the ambient environment. CTMs are split into two types: inorganic CTMs (ICTMs) and organic CTMs (OCTMs). Because of their inexpensive prices, well-adjusted energy levels, and low temperature solution-processed features, OCTMs have been more frequently explored and employed than ICTMs. Various forms of OCTMs with more straightforward synthetic pathways and better performance have been thoroughly researched. Recent achievements in the development of OCTMs will be discussed and evaluated on a molecular level in this study, which will include a systematic categorization of OCTMs based on molecular functionalization techniques. In order to achieve highly efficient and stable PSCs, we will present insights on the structure–property relationship in the design of OCTMs as well as device stability. We hope that this analysis will serve as a comprehensive reference to molecular design guidelines for various types of OCTMs, spurring greater research toward designing highly efficient and OCTMs for stable PSCs.

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“…18 We note that the vast majority of these structures are symmetric, while HTMs based on asymmetric structures have rarely been reported. 19–21 According to previous studies, asymmetric molecular structures tend to exhibit good solubilities in organic solvents, excellent film-forming properties and high thermal stabilities. 22 These characteristics make them quite attractive in organic optoelectronic fields, such as in organic solar cells and organic fluorescence materials.…”

Section: Introductionmentioning

confidence: 96%

Carbazolyl phenylacetone-based asymmetric hole transport material enables high-performance perovskite solar cells

Zhang

et al. 2022

J. Mater. Chem. C

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Blending isomers of fluorine-substituted sulfonyldibenzene as hole transport materials to achieve high efficiency beyond 21% in perovskite solar cells

Cited by 32 publications

References 47 publications

Pyrene Core-based Dopant-free Hole Transporting Materials for Perovskite Solar Cells: A Theoretical Design and Experimental Verification

Pyrene Core-based Dopant-free Hole Transporting Materials for Perovskite Solar Cells: A Theoretical Design and Experimental Verification

Configurable Organic Charge Carriers toward Stable Perovskite Photovoltaics

Carbazolyl phenylacetone-based asymmetric hole transport material enables high-performance perovskite solar cells

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