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

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(7), P. 2964 - 2973

Published: June 12, 2024

Layer-by-layer (LbL) all-polymer solar cells (APSCs) are constructed with or without the incorporation of a Pt complex F-Pt as an energy donor additive in acceptor layer. The power conversion efficiency (PCE) LbL APSCs can be enhanced from 15.86% to 17.14% through introducing 0.2 wt % PY-IT layer, originating efficient transfer PM6 and PY-IT. well confirmed spectral overlapping between photoluminescence (PL) spectra absorption PY-IT, prolonged PL lifetime according transient time-resolved blend films. universality strategy further PBQx-TCl/PY-DT based APSCs, PCE increased 17.57% 18.29% by incorporating into PY-DT

Language: Английский

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A Pseudo Planar Heterojunction Structure for Eco‐Friendly Printable Organic Solar Cells Achieving 19.05% Efficiency

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: April 27, 2024

Abstract Obtaining a well‐accurate vertical distribution active layer morphology through the air‐printing process is an essential task for achieving efficient scalable large‐area organic solar cells (OSCs). In this target, desired and controllable pseudo planar heterojunction (PPHJ) structure with suitable phase separation developed by pre‐deposited D18‐Cl under PM6:BTP‐eC9 film via eco‐friendly manufacturing method. The addition of regulates molecular crystallization leads to ideal stratification while simultaneously suppressing voltage loss, optimizing energetic disorder, carrier management. Impressively, optimal PPHJ devices perform superior power conversion efficiencies (PCEs) 19.05% (100 nm), 17.33% (300 14.14% (4 cm 2 ) compared BHJ devices. Importantly, OSCs also exhibit impressive extrapolated T 80 (the time required reach 80% initial PCE) long‐time storage operational stability, as well thermal stability.

Language: Английский

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Eliminating the Burn‐in Loss of Efficiency in Organic Solar Cells by Applying Dimer Acceptors as Supramolecular Stabilizers

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(23)

Published: April 4, 2024

The meta-stable active layer morphology of organic solar cells (OSCs) is identified as the main cause rapid burn-in loss power conversion efficiency (PCE) during long-term device operation. However, effective strategies to eliminate associated mechanisms from initial stage operation are still lacking, especially for high-efficiency material systems. Herein, introduction molecularly engineered dimer acceptors with adjustable thermal transition properties into OSCs serve supramolecular stabilizers regulating transitions and optimizing crystallization absorber composites reported. By establishing intimate π-π interactions small-molecule acceptors, these can effectively reduce trap-state density (N

Language: Английский

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Layer‐by‐Layer Organic Solar Cells Enabled by 1,3,4‐Selenadiazole‐Containing Crystalline Small Molecule with Double‐Fibril Network Morphology

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(21)

Published: March 27, 2024

A double-fibril network of the photoactive layer morphology is recognized as an ideal structure facilitating exciton diffusion and charge carrier transport for high-performance organic solar cells (OSCs). However, in layer-by-layer processed OSCs (LbL-OSCs), polymer donors small molecule acceptors (SMAs) are separately deposited, it challenging to realize a fibril pure SMAs with absence tight interchain entanglement polymers. In this work, crystalline (SMDs), named TDZ-3TR SeDZ-3TR, were designed introduced into L8-BO acceptor solution, forcing phase separation molecular fibrilization. SeDZ-3TR showed higher crystallinity lower miscibility than TDZ-3TR, enabling more driving force favor better fibrilization L8-BO. On other hand, two donor polymers PM6 D18 different widths lengths put together optimize layer. The simultaneously optimization layers resulted impressive power conversion efficiency (PCE) 19.38 % LbL-OSCs.

Language: Английский

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Simultaneous Optimization of Efficiency, Stretchability, and Stability in All‐Polymer Solar Cells via Aggregation Control^†

Chinese Journal of Chemistry, Journal Year: 2022, Volume and Issue: 41(2), P. 159 - 166

Published: Oct. 4, 2022

Comprehensive Summary With the emergence of Y‐series small molecule acceptors, polymerizing acceptors with aromatic linker units has attracted significant research attention, which greatly advanced photovoltaic performance all‐polymer solar cells. Despite rapid increase in efficiency, unique characteristics ( e. g ., mechanical stretchability and flexibility) systems were still not thoroughly explored. In this work, we demonstrate an effective approach to simultaneously improve device performance, stability, robustness cells by properly suppressing aggregation crystallization behaviors polymerized acceptors. Strikingly, when introducing 50 wt% PYF‐IT (a fluorinated version PY‐IT) into well‐known PM6:PY‐IT system, devices delivered impressive efficiency 16.6%, significantly higher than that control binary cell (15.0%). Compared two systems, optimal ternary blend exhibits more efficient charge separation balanced transport accompanying less recombination. Moreover, a high‐performance 1.0 cm 2 large‐area 15% was demonstrated for optimized blend, offered desirable PCE 14.5% on flexible substrates improved flexibility after bending 1000 cycles. Notably, these are among best results OPVs thus far. This work also heralds bright future wearable energy‐harvesting applications.

Language: Английский

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