Organic solar cells with 20.82% efficiency and high tolerance of active layer thickness through crystallization sequence manipulation

Nature Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 17, 2025

Язык: Английский

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Achieving 18.29% efficiency of layer-by-layer all polymer solar cells enabled by iridium complex as energy donor and crystallizing agent

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160359 - 160359

Опубликована: Фев. 1, 2025

Язык: Английский

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Extending Exciton Diffusion Length via an Organic‐Metal Platinum Complex Additive for High‐Performance Thick‐Film Organic Solar Cells

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 6, 2025

The long exciton diffusion length (LD) plays an important role in promoting dissociation, suppressing charge recombination, and improving the transport process, thereby performance of organic solar cells (OSCs), especially thick-film OSCs. However, limited LD hinders further improvement device as film thickness increases. Here, organic-metal platinum complex, namely TTz-Pt, is synthesized served a solid additive into D18-Cl:L8-BO system. addition TTz-Pt enhanced crystallinity blends, reduced energy disorder, trap density, decreased non-radiative recombination binding energy, which conducive to prolonging TTz-Pt-treated film, facilitating dissociation process along with inhibiting recombination. Consequently, D18:L8-BO:IDIC (100 nm) exhibits champion power conversion efficiency (PCE) 20.12% (certified 19.54%), one highest PCEs reported for OSCs date. Remarkably, record-breaking PCE 18.84% yielded active layer 300 nm. Furthermore, superior universality This work provides simple universal approach extending by introducing complex achieve highly efficient

Язык: Английский

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20.4% Power conversion efficiency from albedo-collecting organic solar cells under 0.2 albedo

Science Advances, Год журнала: 2024, Номер 10(44)

Опубликована: Ноя. 1, 2024

Highly efficient bifacial organic solar cells (OSCs) have not been reported due to limited thickness of the active layer in conventional configurations, allowing for harvesting front sunlight and albedo light. Here, OSCs are with efficiency higher than monofacial counterparts. The incorporation pyramid-based asymmetrical optical transmission (AOT) array a transparent silver electrode suppresses escaping without sacrificing Parasitic absorption induced by excitation surface plasmons an AOT is further reduced doping emitter electron transport capping high dielectric constant film silver. rear achieves transmittance 7% 86%. At 0.2, synergistic effect minimized loss endow power conversion 20.4%. This work paves way utilization light OSCs.

Язык: Английский

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Emergence of Low-Cost and High-Performance Nonfused Ring Electron Acceptors

Accounts of Chemical Research, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 20, 2024

ConspectusOrganic solar cells (OSCs) have garnered significant attention in academic and industrial circles due to their advantages such as lightweight, excellent bending performance, the ability be fabricated into semitransparent devices. Since proposal of bulk heterojunction concept by Heeger et al. 1995, conjugated polymer/fullerene pairs gradually emerged optimal choice for active layer materials OSCs. Fullerene derivatives were preferred electron acceptors OSCs because high mobility. However, limitations insufficient light absorption, limited derivative potential, poor energy level tunability, power conversion efficiency (PCE) based on fullerene has encountered a bottleneck approximately 12%, despite continuous updates polymer donor over nearly two decades development, leading gradual decline importance. By contrast, nonfullerene (NFAs) gained dominance this field since first appearing 2015, thanks tunable absorption spectrum, adjustable levels, modifiable chemical structure. Among acceptors, fused-ring (FREAs) ITIC Y6 achieved progress, boosting PCE 20%. This milestone achievement indicates potential commercial applications. synthesis process FREA is complex often constrained low-yield ring-closure reactions, resulting costs.The molecular backbone nonfused ring (NFREAs) composed single bonds, which enables adoption modular mainly via Stille (based organotin reactant) and/or Suzuki organoboron coupling or C–H activation (without prefunctionalization) avoids ring-closing thus making them alternative acceptors. To achieve planar minimize loss conformational rotation, our team innovatively used intramolecular noncovalent interactions replacement traditional covalent bonds. Furthermore, address issues solubility excessive aggregation during film formation NFREAs, we strategically introduced sterically hindered side groups, 2,6-bis(alkyloxy)phenyl diphenylamino, design, effectively mitigating these problems. These innovative design concepts significantly advanced development high-performance NFREAs increasing from research community. The PCEs improved less than 10% close 20% initial discovery. optimizing device fabrication process, 19%, comparable that FREAs. article will delve evolution latest progress aiming provide valuable insights guidance cost-effective NFREA materials.

Язык: Английский

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Dual Additive‐Assisted Layer‐by‐Layer Processing for 19.59% Efficiency Quasi‐Bulk Heterojunction Organic Solar Cells

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 22, 2024

Abstract The ideal vertical phase separation active layer morphology is crucial for the photoelectric conversion of organic solar cells. In this work, a layer‐by‐layer sequential deposition method used to prepare D18/L8‐BO‐based cells and dual additives strategy adopted construct layer. Additive DIM regulates crystallization D18 layer, additive DIO induces L8‐BO diffuse into interior form composition distribution with large donor/acceptor interpenetrated regions. improvement induced by promote exciton generation dissociation, shorten charge transfer distance, improve carrier dynamics. With improved transport performance suppressed recombination, short‐circuit current density fill factor D18/L8‐BO quasi‐bulk heterojunction are simultaneously, power efficiency boosted significantly from 18.21% 19.59%. Moreover, photovoltaic further verified in D18/Y6 PM6/L8‐BO‐based cells, which implies generalizability additive‐assisted ‐sequential method.

Язык: Английский

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High‐Efficiency Thick Film Binary Organic Photovoltaics via Asymmetric Alkyl Chain Engineering

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 16, 2024

Abstract The development of high‐performance organic photovoltaics (OPVs) with thick film active layers is key to moving this technology from laboratory preparation industrial production. Design and synthesis layer materials achieve a bi‐continuous interpenetrating morphology appropriate nanoscale phase separation has been demonstrated as an effective method realize high‐efficiency devices. Here, two non‐fullerene acceptors are developed compare the effect symmetric (diDT‐BO) asymmetric (DTC11‐BO) substituted alkyl chains on device performance by introducing side central core pyrrole ring. Based solubility crystallinity differences DTC11‐BO diDT‐BO, power conversion efficiencies (PCEs) 19.0% 18.1% realized D18 donor. Importantly, D18:DTC11‐BO devices 300 500 nm excellent PCEs 17.7% 16.1%, which among top‐class values for OPVs reported date. work demonstrates that tunning optimizing material design strategy OPVs.

Язык: Английский

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Homogeneously Blended Donor and Acceptor AgBiS₂ Nanocrystal Inks Enable High‐Performance Eco‐Friendly Solar Cells with Enhanced Carrier Diffusion Length

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 19, 2025

Abstract Colloidal semiconductor nanocrystals (NCs) have garnered significant attention as promising photovoltaic materials due to their tunable optoelectronic properties enabled by surface chemistry. Among them, AgBiS 2 NCs stand out an attractive candidate for solar cell applications environmentally friendly composition, high absorption coefficients, and low‐temperature processability. However, NC photovoltaics generally exhibit lower power conversion efficiency (PCE) compared other NC‐based devices, primarily numerous traps that serve recombination sites, leading a short diffusion length free carriers. To address this challenge, work develops donor acceptor blended (D/A) films. Through ligand modulation, formulates inks with suitable electrical band alignment charge separation, while ensuring they are fully miscible in the same solvent. This fabrication of high‐quality, thickness‐controllable D/A‐blended junction finds approach effectively facilitates carrier enhanced lifetime length. As result, using approach, achieves films twice thick conventional improvements current density PCE 8.26%.

Язык: Английский

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Boosting the Efficiency of Perovskite/Organic Tandem Solar Cells via Enhanced Near‐Infrared Absorption and Minimized Energy Losses

Advanced Materials, Год журнала: 2024, Номер 36(45)

Опубликована: Сен. 18, 2024

Abstract The compatibility of perovskite and organic photovoltaic materials in solution processing provides a significant advantage the fabrication high‐efficiency perovskite/organic tandem solar cells. However, additional recombination losses can occur during exciton dissociation materials, leading to energy near‐infrared region devices. Consequently, ternary rear subcell is designed containing two narrow‐bandgap non‐fullerene acceptors enhance absorption light. Simultaneously, unique diffusion‐controlled growth technique adopted optimize morphology active layer, thereby improving efficiency. This innovation not only broadens range light but also facilitates generation effective excitons. Owing these technological improvements, power conversion efficiency (PCE) cells increased 19.2%. Furthermore, wide‐bandgap front integrated with develop cell. reduction loss, PCE this device significantly improved, reaching 24.5%.

Язык: Английский

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Effective Regulation of Morphologies and Exciton‐Generation Process Enables Quasi‐Planar All‐Polymer Organic Solar Cells Exceed 18% Efficiency

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 27, 2024

Abstract Disordered polymer chain entanglements within all‐polymer blends limit the formation of optimal donor–acceptor phase separation, and thus performance organic solar cells (all‐PSCs). Considering challenge importance morphology regulation in all‐PSCs, a diluted layer‐by‐layer (N‐LBL) strategy is thereby adopted to fine‐tuning properties blends. When comparing traditional PM6:PY‐IT based bulk‐heterojunction (BHJ) film PM6/PY‐IT (LBL) film, N‐LBL which prepared from PM6 (with 3% PY‐IT) bottom layer PY‐IT 6% PM6) top layer, displayed clearer bi‐continuous fibrillar network higher exciton generation process. Benefiting these unique characters, all‐PSC consisting active exhibited short‐circuit current density over 26 mA cm −2 power conversion efficiency (PCE) 18.33%, are both than those BHJ (16.88%) LBL (17.13%) devices. Moreover, universality dilution other (PM6 PY‐DT, PY‐FT‐ o ) also demonstrated with unanimously improved device performance. This work underscores effectiveness method tuning morphologies charge dynamics for high‐performance all‐PSCs.

Язык: Английский

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