Nanoscale heterogeneous distribution of surface energy at interlayers in organic bulk-heterojunction solar cells

Li, Yanxun; Ding, Jianwei; Cheng, Liang; Zhang, Xuning; Zhang, Jianqi; Jakob, Devon S.; Wang, Boxin; Li, Xing; Zhang, Hong; Li, Lina; Yang, Yingguo; Zhang, Guangjie; Zhang, Xiaoxian; Du, Wenna; Liu, Xinfeng; Zhang, Yuan; Zhang, Yong; Xu, Xiaoji G.; Qiu, Xiaohui; Zhou, Huiqiong

doi:10.1016/j.joule.2021.09.001

Cited by 54 publications

(50 citation statements)

References 55 publications

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“…Meanwhile, the individual surface free energy of the active layer and the different CILs were calculated (Figure S12, Supporting Information) based on the Owens equation. [ 56,57 ] It can be seen that the active layer of PM6:BTP‐eC9 shows a surface energy value of 19.1 mN m −1 . For PDINN, it shows an energy of 57.3 mN m −1 due to the polar group attached.…”

Section: Resultsmentioning

confidence: 99%

Fluorinated Perylene‐Diimides: Cathode Interlayers Facilitating Carrier Collection for High‐Performance Organic Solar Cells

et al. 2022

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Organic solar cells (OSCs) have experienced rapid progress with the innovation of near‐infrared (NIR)‐absorbing small‐molecular acceptors (SMAs), while the unique electronic properties of the SMAs raise new challenges in relation to cathode engineering for effective electron collection. To address this issue, two fluorinated perylene‐diimides (PDIs), PDINN‐F and PDINN‐2F, are synthesized by a simple fluorination method, for application as cathode interlayer (CIL) materials. The two bay‐fluorinated PDI‐based CILs possess a lower lowest unoccupied molecular orbital (LUMO) energy level of ≈−4.0 eV, which improves the energy level alignment at the NIR‐SMAs (such as BTP‐eC9)/CIL for a favorable electron extraction efficiency. The monofluorinated PDINN‐F shows higher electron mobility and better improved interfacial compatibility. The PDINN‐F‐based OSCs with PM6:BTP‐eC9 as active layer exhibit an enhanced fill factor and larger short‐circuit current density, leading to a high power conversion efficiency (PCE) exceeding 18%. The devices with PDINN‐F CIL retain more than 80% of their initial PCE after operating at the maximum power point under continuous illumination for 750 h. This work prescribes a facile, cost‐effective, and scalable method for the preparation of stable, high‐performance fluorinated CILs, and instilling promise for the NIR‐SMAs‐based OSCs moving forward.

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Section: Resultsmentioning

confidence: 99%

Fluorinated Perylene‐Diimides: Cathode Interlayers Facilitating Carrier Collection for High‐Performance Organic Solar Cells

et al. 2022

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“…For example, PFIR microscopy has been utilized to identify chemical components of nano-phase separation of block copolymers, 14 field-collected secondary organic aerosols, 41 phonon polaritons supported by boron nitride, 34 wood fibers, 42,43 protein aggregates and biological cells, 19 surface chemical distributions of perovskite and organic photovoltaic films. 19,44,45 PFIR with a polarized laser beam has been utilized to investigate surface chemistry on 2D metal–organic layers (MOLs). 46 In the following subsections, we will describe several representative applications of the PFIR microscopy in the air phase.…”

Section: Applications Of Pfir Microscopy In the Air Phasementioning

confidence: 99%

Principle and applications of peak force infrared microscopy

Wang

2022

Chem. Soc. Rev.

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“…As a result, the device showed superior charge transport, lower charge recombination, and better device performance in conventional PSCs (Figure 6A,B). Li et al 108 investigated that upon mixing MoS 2 nanosheets with PEDOT:PSS, the resulting composite AIL exhibited the same surface energy values at the millimeter level. Moreover, nanoscale heterogeneous distribution of surface energy was found in MoS 2 containing AILs, while the homogeneous distribution of surface energy at nanoscales was observed in reference device based on PEDOT:PSS characterized by peak force quantitative nanomechanical mappings (PFQNM) technique (Figure 6C–E).…”

Section: Functions Of Anode Interlayer and Its Peculiar Features In N...mentioning

confidence: 99%

Anode interfacial modification for non‐fullerene polymer solar cells: Recent advances and prospects

Ahmad

Liang

Fan

et al. 2022

InfoMat

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Recently, the power conversion efficiency (PCE) of single-junction non-fullerene polymer solar cells (NF-PSCs) has surpassed 19% due to the fast development of novel donor polymers, NF-acceptors, device engineering, and interlayer materials.The anode interlayer (AIL) plays a vital role in improving the efficiency and stability of PSCs. The challenges and opportunities in this research area encourage researchers to pursue great innovation in developing new materials and strategies for highly efficient NF-PSCs. This review summarizes the recent development of AIL materials and their modification strategies in single-junction NF-PSCs. Firstly, a brief introduction, key functions, basic requirements, and peculiar features of AILs when employed in NF-PSCs are discussed. Then, the impact of AIL materials (including organic, inorganic, and hybrid materials) on the PCE and the stability of NF-PSCs are described. Afterward, the fabrication of large-area devices and related issues are highlighted. The summary and the future challenges regarding efficient AIL are summarized in the last section of this review.

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Nanoscale heterogeneous distribution of surface energy at interlayers in organic bulk-heterojunction solar cells

Cited by 54 publications

References 55 publications

Fluorinated Perylene‐Diimides: Cathode Interlayers Facilitating Carrier Collection for High‐Performance Organic Solar Cells

Fluorinated Perylene‐Diimides: Cathode Interlayers Facilitating Carrier Collection for High‐Performance Organic Solar Cells

Principle and applications of peak force infrared microscopy

Anode interfacial modification for non‐fullerene polymer solar cells: Recent advances and prospects

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