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

Nature Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

Language: 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, Journal Year: 2025, Volume and Issue: unknown, P. 160359 - 160359

Published: Feb. 1, 2025

Language: 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, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 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

Language: 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, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 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%.

Language: 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, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 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.

Language: Английский

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

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 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.

Language: Английский

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

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 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.

Language: Английский

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

Science Advances, Journal Year: 2024, Volume and Issue: 10(44)

Published: Nov. 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.

Language: Английский

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Weak Absorptive Component Boosts Exciton Dissociation in Indoor Organic Photovoltaics

Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Comprehensive Summary Indoor organic photovoltaic (OPV) cells have emerged as promising candidates for harvesting energy from artificial light sources. However, the limited spectral range and low photon flux of indoor sources restrict photocurrent power output these devices. In this work, we investigate role a weak absorptive third component in enhancing exciton dissociation improving OPV performance. By introducing eC9‐2Cl into D18‐Cl:F‐BTA3 binary system, create ternary blend that demonstrates significant improvements device efficiency. Transient absorption spectroscopy time‐resolved photoluminescence measurements reveal facilitates efficient transfer dissociation. Under lighting conditions, where acts component, devices exhibit conversion efficiency increase 24.7% to 26.2%. These findings highlight potential components optimizing processes overcoming limitations systems.

Language: Английский

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Layer‐by‐Layer Processed Pseudo‐Bilayer Heterojunctions Advance the Performance of Organic Solar Cells

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Abstract Recent progress in organic (semiconductor) solar cells (OSCs) has led to power conversion efficiencies (PCEs) reaching 20%, with predictions that 25% may be possible. Additional PCE improvements, significant efforts have been made address the engineering challenges traditionally limited OSCs small area devices often poor temporal stability. Layer‐by‐layer (LbL) processing of active layers emerged as a promising approach tackle these challenges, numerous state‐of‐the‐art processed using LbL reported. In this Perspective, recent developments are developed enhancing OSC efficiency and stability, particular focus on working mechanisms pseudo‐bilayer heterojunctions (P‐BHJ) practical aspects fabricating high‐performance techniques. By providing insights into resultant film morphology, it is hoped contribute ongoing improve efficiency, scalability explore their potential for broader applications such example indoor light harvesting or agrivoltaics.

Language: Английский

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