Shamrock-shaped non-fullerene acceptors enable high-efficiency and high-voltage organic photovoltaics

Wang, Zongtao; Ji, Mengwei; Tang, Ailing; Du, Mengzhen; Mu, Chenyu; Liu, Yingliang; Wang, Ergang; Zhou, Erjun

doi:10.1039/d4ee00540f

Cited by 7 publications

(1 citation statement)

References 49 publications

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“…More complex multi-rings were also attached to the core. 34,67–74 Ge and coworkers developed two isomer acceptors, Qx-α and Qx-γ, by overturning the direction of the thiophene-fused rings on the Qx-based cores. 67 Compared to Qx-γ, Qx-α delivered a higher dipole moment, a more ordered molecular stacking, and increased surface energy.…”

Section: Recent Developments In Qx-type Acceptorsmentioning

confidence: 99%

Quinoxaline-based nonfullerene acceptors with powerful core-functionalization ability enabling efficient solar energy utilization

Liu,

Jiang,

Liu

et al. 2024

Energy Environ. Sci.

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Section: Recent Developments In Qx-type Acceptorsmentioning

confidence: 99%

Quinoxaline-based nonfullerene acceptors with powerful core-functionalization ability enabling efficient solar energy utilization

Liu,

Jiang,

Liu

et al. 2024

Energy Environ. Sci.

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Selenization Strategy of Phenazine‐based Non‐Fullerene Acceptors Promotes Photon Harvesting and Reduces Voltage Loss in Organic Solar Cells

Li,

Peng,

Qiu

et al. 2024

Adv Funct Materials

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Phenazine‐based small molecular acceptors (SMAs), which benefit from the reduced energy loss (Eloss), have emerged as promising candidates for achieving high‐efficiency organic solar cells (OSCs). Nevertheless, the potential advancements of phenazine‐based photovoltaic devices are hindered by the constrained short‐circuit current (Jsc). Though the incorporation of selenium (Se) atoms has been proven effective in enhancing Jsc, it simultaneously introduces molecular disorder stacking and charge recombination. Based on the desire to harness the full potential of phenazine structure and the benefits of Se substitution, a series of Se‐substituted phenazine‐based SMAs, namely PzIC‐SSe‐4F and PzIC‐SeSe‐4F are meticulously synthesized. Due to the increased photon harvesting capabilities, the photovoltaic device using PzIC‐SeSe‐4F demonstrated a significantly increased Jsc of 27.73 mA cm−2. Remarkably, the PzIC‐SeSe‐4F‐based device displayed an astonishing open circuit voltage (Voc) of 0.873 V, representing the highest Voc recorded among all reported symmetric Se‐substituted Y‐series SMAs‐based photovoltaic devices. Thanks to the synergistic effect of phenazine central cores and Se substitution, the PM6:PzIC‐SeSe‐4F‐based device achieves a power conversion efficiency (PCE) of 17.69%. The findings serve as a pivotal reference for further development of high‐efficiency Se‐substituted photovoltaic devices.

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The Development of Quinoxaline‐Based Electron Acceptors for High Performance Organic Solar Cells

Liu,

Geng,

Xiao

et al. 2024

Advanced Materials

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In the recent advances of organic solar cells (OSCs), quinoxaline (Qx)‐based nonfullerene acceptors (QxNFAs) have attracted lots of attention and enabled the recorded power conversion efficiency approaching 20%. As an excellent electron‐withdrawing unit, Qx possesses advantages of many modifiable sites, wide absorption range, low reorganization energy, and so on. To develop promising QxNFAs to further enhance the photovoltaic performance of OSCs, it is necessary to systematically summarize the QxNFAs reported so far. In this review, all the focused QxNFAs are classified into five categories as following: SM‐Qx, YQx, fused‐YQx, giant‐YQx, and polymer‐Qx according to the molecular skeletons. The molecular design concepts, relationships between the molecular structure and optoelectronic properties, intrinsic mechanisms of device performance are discussed in detail. At the end, the advantages of this kind of materials are summed up, the molecular develop direction is prospected, the challenges faced by QxNFAs are given, and constructive solutions to the existing problems are advised. Overall, this review presents unique viewpoints to conquer the challenge of QxNFAs and thus boost OSCs development further toward commercial applications.

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Shamrock-shaped non-fullerene acceptors enable high-efficiency and high-voltage organic photovoltaics

Abstract: Minimizing energy loss to increase open-circuit voltage (VOC) is an essential topic to further improve the power conversion efficiency (PCE) in organic photovoltaics (OPVs). Though various molecular strategies have been...

Cited by 7 publications

References 49 publications

Quinoxaline-based nonfullerene acceptors with powerful core-functionalization ability enabling efficient solar energy utilization

Quinoxaline-based nonfullerene acceptors with powerful core-functionalization ability enabling efficient solar energy utilization

Selenization Strategy of Phenazine‐based Non‐Fullerene Acceptors Promotes Photon Harvesting and Reduces Voltage Loss in Organic Solar Cells

The Development of Quinoxaline‐Based Electron Acceptors for High Performance Organic Solar Cells

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