The rational and effective design of nonfullerene acceptors guided by a semi-empirical model for an organic solar cell with an efficiency over 15%

Ke, Xuezhi; Meng, Lingxian; Wan, Xiangjian; Li, Mingpeng; Sun, Yanna; Guo, Ziqi; Wu, Simin; Zhang, Hongtao; Li, Chenxi; Chen, Yongsheng

doi:10.1039/d0ta03087b

Cited by 57 publications

(55 citation statements)

References 58 publications

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“…The V eff is the difference between the bias and the corresponding voltage under J ph = 0 condition. [ 31–34 ] The J ph of optimal ternary OPVs can arrive into saturated states at a relatively low V eff of ≈0.3 V, suggesting the efficient charge transport and collection in the ternary active layers, which can be further confirmed from the relatively large FF of 78.26%. [ 35 ] Under a relatively large V eff of ≈0.5 V, the values of J ph of BTP‐BO‐4F‐based binary and Y6‐1O‐based binary OPVs will come into saturated states, suggesting the insufficient charge transport in the two binary active layers.…”

Section: Resultsmentioning

confidence: 94%

Ternary Organic Photovoltaic Cells Exhibiting 17.59% Efficiency with Two Compatible Y6 Derivations as Acceptor

et al. 2021

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Efficient organic photovoltaic cells (OPVs) are fabricated using two structurally similar Y6 derivations (BTP‐BO‐4F and Y6‐1O) as acceptor and PM6 as donor. The two binary OPVs exhibit a high fill factor (FF) (>76%), the complementary short‐circuit‐current density (JSC) and open‐circuit voltage (VOC). The high FFs of binary OPVs indicate the good compatibility of corresponding materials to form efficient charge transport channels. A power conversion efficiency (PCE) of 17.59% is obtained from ternary OPVs with 15 wt% Y6‐1O in acceptors, benefiting from the simultaneously improved JSC of 26.13 mA cm−2, a VOC of 0.860 V, and an FF of 78.26%. The values of VOC of ternary OPVs can be gradually increased along with the incorporation of Y6‐1O, suggesting the preferred formation of an alloyed state between BTP‐BO‐4F and Y6‐1O due to their good compatibility. Meanwhile, the cascaded energy levels of BTP‐BO‐4F and Y6‐1O can form efficient electron transport channels in ternary active layers. The main contribution of Y6‐1O can be summarized as enhancing photon harvesting, optimizing phase separation, and adjusting molecular arrangement. The experimental results may provide new insight on developing efficient ternary OPVs by selecting two well‐compatible acceptors.

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Section: Resultsmentioning

confidence: 94%

Ternary Organic Photovoltaic Cells Exhibiting 17.59% Efficiency with Two Compatible Y6 Derivations as Acceptor

et al. 2021

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“…[52] In 2020, Wan et al designed an oxygencontaining ADA acceptor FO-2F. [53] Solar cells based on FO-2F and a polymer donor PM6 gave an impressive PCE of 15.05%. In 2018, Jen et al reported a nitrogen-containing acceptor SN6IC-4F.…”

Section: Small Molecule Nfas 2017-2020mentioning

confidence: 99%

“…designed an oxygen‐containing ADA acceptor FO‐2F. [ 53 ] Solar cells based on FO‐2F and a polymer donor PM6 gave an impressive PCE of 15.05%. In 2018, Jen et al.…”

Section: Molecular Design For Nfa Materials: Review and Perspectivementioning

confidence: 99%

A History and Perspective of Non‐Fullerene Electron Acceptors for Organic Solar Cells

Armin

Sandberg

et al. 2021

Advanced Energy Materials

424

414

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“…之后, 他们 [73] [77] 采用"碳氧桥"取代"碳桥"的策略设计了 CO i 8DFIC, 与 PTB7-Th 共混的器件效率达到 12.16%, J SC 高达 26.12 mA•cm -2 . 2020 年, 陈永胜等 [78] [85] . 一方面, 此类分子更倾向于醌式共振结构, 从而在保持较深能级的情况下实现更窄的带隙, 获得更高的 J SC ; 另一方面, 基于此类材料的活性层电致发光效率较高, 可以有效减少器件的电压损失.…”

Section: 稠环电子受体unclassified

Advances in Organic Photovoltaics

Li¹,

Zhan²

2021

Acta Chimica Sinica

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Organic solar cells (OSCs), based on organic semiconductor materials as photoactive layers, have attracted broad interest as a promising next-generation photovoltaic technology, since they can be fabricated into low-cost, colorful, semitransparent, flexible, and large-area devices through printing process. In the past decades, enormous efforts have been dedicated to improving power conversion efficiencies (PCEs) of OSCs, such as designing high-performance photovoltaic materials, optimizing device interfacial layers, controlling active layer morphology, developing new device architectures, and elucidating device working mechanism. Nowadays, the PCEs of small-area OSCs have exceeded 18%. In addition, in order to realize commercialization of OSCs, considerable progress has been made in manufacturing large-area OSCs, reducing cost, improving lifetime, and exploring potential applications in building integrated photovoltaics and indoor photovoltaics. Chinese researchers have made pioneering and leading contributions in this field. In this review, first, we briefly introduce basic knowledge of OSCs; then, summarize important recent research progress in terms of molecular engineering, device engineering, device physics and application exploration; finally, analyze challenges and future prospects of this field.

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The rational and effective design of nonfullerene acceptors guided by a semi-empirical model for an organic solar cell with an efficiency over 15%

Abstract: Guided by a semi-empirical model, two small-molecule acceptors were rationally designed and an impressive PCE of 15.05% was achieved.

Cited by 57 publications

References 58 publications

Ternary Organic Photovoltaic Cells Exhibiting 17.59% Efficiency with Two Compatible Y6 Derivations as Acceptor

Ternary Organic Photovoltaic Cells Exhibiting 17.59% Efficiency with Two Compatible Y6 Derivations as Acceptor

A History and Perspective of Non‐Fullerene Electron Acceptors for Organic Solar Cells

Advances in Organic Photovoltaics

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