Compromising Charge Generation and Recombination of Organic Photovoltaics with Mixed Diluent Strategy for Certified 19.4% Efficiency

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(21)

Published: March 3, 2023

The ternary blend is demonstrated as an effective strategy to promote the device performance of organic photovoltaics (OPVs) due dilution effect. While compromise between charge generation and recombination remains a challenge. Here, mixed diluent for further improving efficiency OPV proposed. Specifically, high-performance system with polymer donor, i.e., PM6, nonfullerene acceptor (NFA), BTP-eC9, diluted by diluents, which involve high bandgap NFA BTP-S17 low BTP-S16 (similar that BTP-eC9). better miscibility BTP-eC9 can dramatically enhance open-circuit voltage (VOC ), while maximizes or short-circuit current density (JSC ). interplay BTP-17 enables recombination, thus leading 19.76% (certified 19.41%), best among single-junction OPVs. Further analysis on carrier dynamics validates efficacy diluents balancing be attributed more diverse energetic landscapes improved morphology. Therefore, this work provides commercialization.

Language: Английский

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Polymer Semiconductors: Synthesis, Processing, and Applications

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(12), P. 7421 - 7497

Published: May 26, 2023

Polymer semiconductors composed of a carbon-based π conjugated backbone have been studied for several decades as active layers multifarious organic electronic devices. They combine the advantages electrical conductivity metals and mechanical behavior plastics, which are going to become one futures modulable materials. The performance materials depends both on their chemical structures multilevel microstructures in solid states. Despite great efforts that made, they still far from producing clear picture among intrinsic molecular structures, microstructures, device performances. This review summarizes development polymer recent aspects material design related synthetic strategies, processing technologies, functional applications. especially emphasized, plays decisive role determining performance. discussion shows panorama research sets up bridge across finally devices Finally, this discusses grand challenges future opportunities semiconductors.

Language: Английский

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Benzo[d]thiazole Based Wide Bandgap Donor Polymers Enable 19.54% Efficiency Organic Solar Cells Along with Desirable Batch‐to‐Batch Reproducibility and General Applicability

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(21)

Published: March 4, 2023

Abstract The limited selection pool of high‐performance wide bandgap (WBG) polymer donors is a bottleneck problem the nonfullerene acceptor (NFA) based organic solar cells (OSCs) that impedes further improvement their photovoltaic performances. Herein, series new WBG polymers, namely PH‐BTz, PS‐BTz, PF‐BTz, and PCl‐BTz, are developed by using bicyclic difluoro‐benzo[d]thiazole (BTz) as block benzo[1,2‐b:4,5‐b′]dithiophene (BDT) derivatives donor units. By introducing S, F, Cl atoms to alkylthienyl sidechains on BDT, resulting polymers exhibit lowered energy levels enhanced aggregation properties. fluorinated PBTz‐F not only exhibits low‐lying HOMO level, but also has stronger face‐on packing order results in more uniform fibril‐like interpenetrating networks related PF‐BTz:L8‐BO blend. A high‐power conversion efficiency (PCE) 18.57% achieved. Moreover, good batch‐to‐batch reproducibility general applicability. In addition, ternary blend OSCs host PBTz‐F:L8‐BO PM6 guest PCE 19.54%, which among highest values OSCs.

Language: Английский

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19.7% efficiency binary organic solar cells achieved by selective core fluorination of nonfullerene electron acceptors

Joule, Journal Year: 2024, Volume and Issue: 8(3), P. 835 - 851

Published: Jan. 30, 2024

Language: Английский

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Interface Engineering for Highly Efficient Organic Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(16)

Published: March 3, 2023

Organic solar cells (OSCs) have made dramatic advancements during the past decades owing to innovative material design and device structure optimization, with power conversion efficiencies surpassing 19% 20% for single-junction tandem devices, respectively. Interface engineering, by modifying interface properties between different layers OSCs, has become a vital part promote efficiency. It is essential elucidate intrinsic working mechanism of layers, as well related physical chemical processes that manipulate performance long-term stability. In this article, advances in engineering aimed pursue high-performance OSCs are reviewed. The specific functions corresponding principles summarized first. Then, anode layer, cathode layer interconnecting devices discussed separate categories, engineering-related improvements on efficiency stability analyzed. Finally, challenges prospects associated application emphasis large-area, high-performance, low-cost manufacturing.

Language: Английский

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Organic Solar Cells with Over 19% Efficiency Enabled by a 2D‐Conjugated Non‐Fullerene Acceptor Featuring Favorable Electronic and Aggregation Structures

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(32)

Published: May 27, 2023

The π-expansion of non-fullerene acceptors is a promising method for boosting the organic photovoltaic performance by allowing fine-tuning electronic structures and molecular packing. In this work, highly efficient solar cells (OSCs) are fabricated using 2D strategy to design new acceptors. Compared with quinoxaline-fused cores AQx-16, π-expanded phenazine-fused AQx-18 induce more ordered compact packing between adjacent molecules, affording an optimized morphology rational phase separation in blend film. This facilitates exciton dissociation inhibited charge recombination. Consequently, power conversion efficiency (PCE) 18.2% simultaneously increasing Voc , Jsc fill factor achieved AQx-18-based binary OSCs. Significantly, ternary devices via two-in-one alloy acceptor exhibit superior PCE 19.1%, one highest values ever reported OSCs, along high 0.928 V. These results indicate importance delicate regulation crystalline behaviors achieve performance, aimed at significantly promoting further development

Language: Английский

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Self-Assembled Monolayers for Interfacial Engineering in Solution-Processed Thin-Film Electronic Devices: Design, Fabrication, and Applications

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(5), P. 2138 - 2204

Published: Feb. 29, 2024

Interfacial engineering has long been a vital means of improving thin-film device performance, especially for organic electronics, perovskites, and hybrid devices. It greatly facilitates the fabrication performance solution-processed devices, including field effect transistors (OFETs), solar cells (OSCs), perovskite (PVSCs), light-emitting diodes (OLEDs). However, due to limitation traditional interfacial materials, further progress these devices is hampered particularly in terms stability, flexibility, sensitivity. The deadlock gradually broken through development self-assembled monolayers (SAMs), which possess distinct benefits transparency, diversity, sensitivity, selectivity, surface passivation ability. In this review, we first showed evolution SAMs, elucidating their working mechanisms structure–property relationships by assessing wide range SAM materials reported date. A comprehensive comparison various growth, fabrication, characterization methods was presented help readers interested applying works. Moreover, recent design applications mainstream electronic OFETs, OSCs, PVSCs OLEDs, summarized. Finally, an outlook prospects section summarizes major challenges SAMs used

Language: Английский

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Sequential Deposition of Multicomponent Bulk Heterojunctions Increases Efficiency of Organic Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(12)

Published: Jan. 18, 2023

Constructing tandem and multi-blend organic solar cells (OSCs) is an effective way to overcome the absorption limitations of conventional single-junction devices. However, these methods inevitably require tedious multilayer deposition or complicated morphology-optimization procedures. Herein, sequential utilized as simple method fabricate multicomponent OSCs with a double-bulk heterojunction (BHJ) structure active layer further improve photovoltaic performance. Two efficient donor-acceptor pairs, D18-Cl:BTP-eC9 PM6:L8-BO, are sequentially deposited form D18-Cl:BTP-eC9/PM6:L8-BO double-BHJ layer. In OSCs, light significantly improved, optimal morphology also retained without requiring more optimization involved in quaternary blends. Compared blend devices, energy loss (Eloss ) reduced by rationally matching each donor appropriate acceptor. Consequently, power conversion efficiency (PCE) improved from 18.25% for 18.69% PM6:L8-BO based binary 19.61% OSCs. contrast, D18-Cl:PM6:L8-BO:BTP-eC9 exhibited dramatically PCE 15.83%. These results demonstrate that strategy, relatively processing procedure, can potentially enhance device performance lead widespread use.

Language: Английский

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Aggregation behaviour of pyrene-based luminescent materials, from molecular design and optical properties to application

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(19), P. 6715 - 6753

Published: Jan. 1, 2023

This review not only highlights the progress of emission and electronic behaviour new pyrene-based luminescence molecules in aggregated state, but also provides a perspective for understanding mechanism optoelectronic properties pyrenes.

Language: Английский

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Y‐Type Non‐Fullerene Acceptors with Outer Branched Side Chains and Inner Cyclohexane Side Chains for 19.36% Efficiency Polymer Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(10)

Published: Jan. 5, 2023

Abstract Raising the lowest unoccupied molecular orbital (LUMO) energy level of Y‐type non‐fullerene acceptors can increase open‐circuit voltage ( V oc ) and thus photovoltaic performance current top performing polymer solar cells (PSCs). One viable routes is demonstrated by successful Y6 derivative L8‐BO with branched alkyl chains at outer side. This will introduce steric hindrance reduce intermolecular aggregation, open up bandgap raise LUMO level. To take further advantages influence on optoelectronic properties derivatives, two BTP‐Cy‐4F BTP‐Cy‐4Cl are designed synthesized adopting side inner cyclohexane chains. An outstanding 0.937 achieved in D18:BTP‐Cy‐4F binary blend devices along a power conversion efficiency (PCE) 18.52%. With addition BTP‐eC9 to extend absorption spectral coverage, remarkable PCE 19.36% realized finally related ternary devices, which one highest values for single‐junction PSCs present. The results illustrate great potential constructing high‐performance their PSCs.

Language: Английский

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