A nonfullerene acceptor as a solid additive realizing a record efficiency of 17.74% in quasi-layered all-polymer solar cells

Xu, Wenjing; Zhang, Miao; Liu, Zhongyuan; Tian, Hongyue; Zhang, Wenqing; Sun, Shixiu; Jeong, Sang Young; Zhang, Fenghua; Li, Xiong; Sun, Qianqian; Hao, Xiaotao; Woo, Han Young; Ma, Xiaoling; Zhang, Fujun

doi:10.1039/d3ta07228b

Cited by 27 publications

(9 citation statements)

References 49 publications

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“…The variation of roughness can be estimated by the molecular crystallinity in blend films. [41][42][43][44] The decreased roughness of doped-PTAA films is mainly attributed to the enhanced crystallinity of PTAA domain when DRCN5T was incorporated into PTAA films, which can be confirmed from the increased molecular crystal coherence length (CCL) in IP or OOP directions.…”

Section: Resultsmentioning

confidence: 99%

Interfacial Engineering for Photomultiplication Type Organic Photodetectors with Signal‐Noise‐Ratio Over 89 000

Liu,

Yao,

et al. 2024

Advanced Optical Materials

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Photomultiplication type organic photodetectors (PM‐OPDs) exhibit obvious superiority in weak light detection due to their low dark current density (JD) and large photo‐induced current density (JPI). The JD is one of the important parameters that influences light detection sensitivity of PM‐OPDs, how to effectively suppress the JD is a great challenge to improve the performance of PM‐OPDs. In this work, the JD of PM‐OPDs can be suppressed by employing PTAA or doped‐PTAA as the interfacial layer replacing PEDOT:PSS layer. The PM‐OPDs with PTAA layer exhibit a low JD of 2.3 × 10−7 A cm−2 under −6 V bias, which is much smaller than 1.4 × 10−6 A cm−2 for PM‐OPDs with PEDOT:PSS layer. The small molecule DRCN5T is incorporated into PTAA to further passivate surficial defects of PTAA films, which is conducive to reducing the leakage current of PM‐OPDs. The optimal PM‐OPDs exhibit rather low JD of 8.4 × 10−8 A cm−2 under −6 V bias, as well as external quantum efficiency (EQE) of 31700% and specific detectivity (D*) of 1.2 × 1013 Jones at 370 nm. The signal‐noise‐ratio of optimal PM‐OPDs arrives to 89600 under −4.5 V bias under white light illumination with intensity of 1.5 mW cm−2.

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Section: Resultsmentioning

confidence: 99%

Interfacial Engineering for Photomultiplication Type Organic Photodetectors with Signal‐Noise‐Ratio Over 89 000

Liu,

Yao,

et al. 2024

Advanced Optical Materials

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“…The highly crystalline nature of F-Pt may induce it as crystallinity agent for ameliorating molecular packing of host materials, and similar phenomenon has been reported in the literature. 63,64 When incorporating 0.2 wt % F-Pt into PY-IT films, the face-on orientation of PY-IT is more ordered for effective electron transport in films, which can be well supported by apparently elevated OOP (010) and IP (100) diffraction intensity of PY- IT:F-Pt films. The OOP (010) and IP (100) diffraction peaks for PM6/PY-IT films are located at 1.623 and 0.286 Å, which is close to the position of neat PY-IT and PM6 films, manifesting that the π−π stacking and lamellar stacking in LbL films is largely determined by PY-IT and PM6, respectively.…”

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confidence: 83%

Over 17.1% or 18.2% Efficiency of Layer-by-Layer All-Polymer Solar Cells via Incorporating Efficient Pt Complexes as Energy Donor Additive

Zhang,

et al. 2024

ACS Materials Lett.

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“…Pseudo-bilayer planar heterojunction (PPHJ) configuration-based APSCs have attracted a lot of attention since the stepwise deposition method is employed to form more desirable vertical phase separation with donor or acceptor enrichment near the anode or cathode [8]. The stepwise deposition method can also provide more opportunities to separately adjust donors' and acceptors' morphologies by solvent engineering, n-type doping [9], a dilution strategy [10,11], additive engineering [12,13], annealing treatment, etc. [14].…”

Section: Introductionmentioning

confidence: 99%

Nonfullerene Small Molecular Acceptor Acting as a Solid Additive Enables Highly Efficient Pseudo-Bilayer All-Polymer Solar Cells

Liu,

Ni,

Zhang

et al. 2024

Energies

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In this work, pseudo-bilayer planar heterojunction (PPHJ) all-polymer solar cells (APSCs) were constructed on the basis of the commonly used PY-IT and PM6 as the acceptor and donor, respectively. A nonfullerene small molecular acceptor (NF-SMA) BTP-eC9 was incorporated into the PY-IT layer as the solid additive in consideration of its similar building block to PY-IT. BTP-eC9 can serve as a photon capture reinforcer and morphology-regulating agent to realize more adequate photon capture, as well as a more orderly molecular arrangement for effective carrier transport. By incorporating 2 wt% BTP-eC9, the efficiency of PM6/PY-IT-based PPHJ-APSCs was boosted from 15.11% to 16.47%, accompanied by a synergistically enhanced short circuit current density (JSC, 23.36 vs. 24.08 mA cm−2) and fill factor (FF, 68.83% vs. 72.76%). In another all-polymer system, based on PBQx-TCl/PY-DT as the active layers, the efficiency could be boosted from 17.51% to 18.07%, enabled by the addition of 2 wt% L8-BO, which further verified the effectiveness of using an NF-SMA as a solid additive. This work demonstrates that incorporating an NF-SMA as a solid additive holds great potential for driving the development of PPHJ-APSCs.

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A nonfullerene acceptor as a solid additive realizing a record efficiency of 17.74% in quasi-layered all-polymer solar cells

Abstract: Quasi-layered all-polymer solar cells (QLA-PSCs) were fabricated based on wide bandgap polymer PM6 as donor and narrow bandgap polymer PY-IT as acceptor. A nonfullerene acceptor L8-BO is deliberately selected as...

Cited by 27 publications

References 49 publications

Interfacial Engineering for Photomultiplication Type Organic Photodetectors with Signal‐Noise‐Ratio Over 89 000

Interfacial Engineering for Photomultiplication Type Organic Photodetectors with Signal‐Noise‐Ratio Over 89 000

Over 17.1% or 18.2% Efficiency of Layer-by-Layer All-Polymer Solar Cells via Incorporating Efficient Pt Complexes as Energy Donor Additive

Nonfullerene Small Molecular Acceptor Acting as a Solid Additive Enables Highly Efficient Pseudo-Bilayer All-Polymer Solar Cells

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