High‐Performance Organic Narrow Dual‐Band Circular Polarized Light Detection for Encrypted Communications and Color Imaging

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 10, 2024

Conventional circularly polarized light (CPL) detectors necessitate several optical elements, posing difficulties in achieving miniature and integrated devices. Recently developed organic CPL require no additional elements but usually suffer from low detectivity or asymmetry factor (g-factor). Here, an detector with excellent a high g-factor is fabricated. By employing inverted quasi-planar heterojunction (IPHJ) structure incorporating liquid crystal film, outstanding of 1.62 developed. Unfavorable charge injection effectively suppressed by the IPHJ structure, which reduces dark current photodetector. Consequently, left 6.16 × 10

Язык: Английский

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How can we improve the stability of organic solar cells from materials design to device engineering?

Aggregate, Год журнала: 2024, Номер 5(5)

Опубликована: Апрель 22, 2024

Abstract Among a promising photovoltaic technology for solar energy conversion, organic cells (OSCs) have been paid much attention, of which the power conversion efficiencies (PCEs) rapidly surpassed over 20%, approaching threshold potential applications. However, device stability OSCs including storage stability, photostability and thermal remains to be an enormous challenge when faced with practical The major causes instability are rooted in poor inherent properties light‐harvesting materials, metastable morphology, interfacial reactions highly sensitive external stresses. To get rid these flaws, comprehensive review is provided about recent strategies methods improving from active layers, engineering encapsulation techniques high‐performance OSC devices. In end, prospectives next stage development devices satisfactory long‐term afforded community.

Язык: Английский

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In‐Situ Removable Solid Additive Optimizing Active Layer and Cathode Interlayer of Organic Solar Cells

Advanced Energy Materials, Год журнала: 2024, Номер 14(40)

Опубликована: Июль 21, 2024

Abstract In situ removable (ISR) solid additive can employ cold sublimation process to optimize active layer morphology for organic solar cells (OSCs), thus remaining unique potential. Herein, a feasible guideline is proposed discover new ISR 1‐bromo‐4‐chlorobenzene (CBB), whose removing time ( T R ) between those of reported additives 1,4‐dichlorobenzene (DCB) and 1‐chloro‐4‐iodobenzene (CIB). The CBB with moderate beneficial affording the optimal achieving highest power conversion efficiency (PCE) 18.58% D18:L8‐BO binary layer, as supported by most efficient exciton splitting, fastest transfer, balanced carrier transports. Due ability, DCB, CBB, CIB are further aggregation PDINN cathode interlayer. Particularly, CBB‐ CIB‐treated interlayers afforded based OSCs excellent PCEs 19.38% 19.26%, along remarkable fill factors 80.98% 81.37%, respectively. suppress non‐radiative recombination devices, resulting in higher open‐circuit voltage. This work not only provides an effective approach flourish but also expands application OSCs.

Язык: Английский

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Dithienoquinoxaline-quaterthiophene wide bandgap donor polymers with strong interchain aggregation for efficient organic solar cells processed with a non-halogenated solvent

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(10), С. 5731 - 5739

Опубликована: Янв. 1, 2024

Wide bandgap oligothiophene based polymers PQx4T and PQx4T-2F were synthesized, among which was very efficient to construct toluene-processed active layers with a non-fullerene acceptor.

Язык: Английский

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19.36% Efficiency Organic Solar Cells Based on Low‐Cost Terpolymer Donors with Simple Molecular Structures

Advanced Functional Materials, Год журнала: 2024, Номер 34(44)

Опубликована: Май 19, 2024

Abstract Low cost and high performance are key elements for the industrialization of organic solar cells (OSCs). In view this, developing highly‐efficient photovoltaic molecules with simple chemical structure is one most effective countermeasures. Herein, three simple‐structure terpolymers PTQ12‐5, PTQ12‐10, PTQ12‐15 designed synthesized, by embedding difluoro‐substituted bithiophene (2T‐2F) unit into backbone low‐cost high‐efficiency polymer PTQ10. The synthesis contains only two‐step synthetic routes over 85% yields from cheap raw compounds, thus exhibiting distinctly characteristic. Remarkably, PTQ12‐5 shows significantly higher absorbance coefficient hole mobility than Consequently, PTQ12‐5‐based OSCs more efficient exciton dissociation charge transfer, suppressed carrier recombination, tighter molecular π‐π stacking, faster balanced transport, demonstrates a improved efficiency 18.77% that PTQ10‐based device (18.03%). Moreover, an outstanding 19.36% achieved in ternary further modulating energy level alignment blending features photoactive molecules, which highest based on polymers to date. This work has significant implications guiding design high‐performance materials.

Язык: Английский

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Thickness Insensitive UV Blocking Layer Meliorating Carrier Extraction and Deep Trap towards Stable Organic Solar Cells

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

Abstract The photostability of organic solar cells (OSCs) is extremely crucial to their commercial application. Herein, double‐layered anode interface layer (DL‐AIL) with ultraviolet (UV) absorber BP2 constructed by layer‐by‐layer processing simultaneously improve power‐conversion efficiencies (PCEs) and OSCs. DL‐AIL exhibits good UV absorbance photon utilization due the effective Förster energy transfer from polymer donor. High electric conductivity, optimal work function, improved surface roughness can be obtained as well. based devices also achieve higher PCEs excellent thickness insensitivity, attributed remarkable increase on conductivity reduced transport resistance. More intriguingly, even under irradiation in air xenon lamp band, an extrapolated T 80 lifetime device 85 nm thick reach 1306 h, which approximately 54 times that PEDOT:PSS device. Furthermore, degradation mechanism OSCs different AIL revealed transient charge extraction, capacitance‐voltage capacitance‐frequency. incorporation delivers carrier density constrained deep trap aged devices. Consequently, this new finding demonstrates strategy promote efficiency long‐term stability

Язык: Английский

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Designer Conjugation-Break Spacer That Boosts Charge Transport in Semiconducting Terpolymers

Macromolecules, Год журнала: 2024, Номер 57(12), С. 5902 - 5914

Опубликована: Июнь 5, 2024

Conjugated polymers (CPs) are pivotal for high-mobility applications, typically avoiding nonconjugated units due to their perceived negative impact on charge transport. Contrary this belief, our study introduces a unit, DKPDO, which when employed as conjugation-break spacer (CBS), significantly enhances DKPDO was obtained center-modified isoindigo variant featuring strongly electron-withdrawing amide groups that diminish the electron density and foster multiple hydrogen-bonding interactions. This results in enhanced deficiency reinforced coplanarity relative isoindigo. incorporated into polymer backbone, comprising bithiophene, create series of terpolymers with varied molar ratios, allowing systematic evaluation solubilities, interchain interactions, crystallinities, energy levels. Notably, incorporating universal improvement hole mobilities operational stabilities over DKPDO-free counterpart. Remarkably, terpolymer containing 2.5% achieves high mobility 4.12 cm2 V–1 s–1, approximately 6-fold higher than parent CP among highest CPs based center-inserted units. The not only, first time, realizes transport enhancement CBS backbones but also sets precedent strategic use developing high-performing CPs.

Язык: Английский

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A Three‐in‐One Hybrid Strategy for High‐Performance Semiconducting Polymers Processed from Anisole

Advanced Science, Год журнала: 2024, Номер 11(25)

Опубликована: Апрель 22, 2024

Abstract The development of semiconducting polymers with good processability in green solvents and competitive electrical performance is essential for realizing sustainable large‐scale manufacturing commercialization organic electronics. A major obstacle the processability‐performance dichotomy that dictated by lack ideal building blocks balanced polarity, solubility, electronic structures, molecular conformation. Herein, through integration donor, quinoid acceptor units, an unprecedented block, namely TQBT, introduced constructing a serial conjugated polymers. distinct non‐symmetric structure high dipole moment, imparts enhanced solubility anisole—a solvent—to polymer TQBT‐T. Furthermore, PTQBT‐T possess highly rigid planar backbone owing to nearly coplanar geometry quinoidal nature resulting strong aggregation solution localized aggregates film. Remarkably, films spuncast from anisole exhibit hole mobility 2.30 cm 2 V ‐1 s , which record solvent‐processable via spin‐coating, together commendable operational storage stability. hybrid block emerges as pioneering electroactive unit, shedding light on future design strategies high‐performance compatible processing marking significant stride towards ecofriendly

Язык: Английский

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Efficient and Stable Air‐processed Organic Solar Cells Enabled by an Antioxidant Additive

Advanced Materials, Год журнала: 2024, Номер 36(35)

Опубликована: Июнь 14, 2024

Current high-efficiency organic solar cells (OSCs) are generally fabricated in an inert atmosphere that limits their real-world scalable manufacturing, while the efficiencies of air-processed OSCs lag far behind. The impacts ambient factors on cell fabrication remain unclear. In this work, effects systematically investigated, and it is unveiled oxidation doping light absorbers dominant reasons causing degradation when air. To address issue, a new strategy for fabricating high-performance by introducing antioxidant additive (4-bromophenylhydrazine, BPH) into precursor solutions, developed. BPH can effectively inhibit oxygen infiltration from to photoactive layer suppress trap formation caused oxidation. Compared with conventional OSCs, remarkably increases power conversion efficiency (PCE) 16.7% 19.3% (independently certified as 19.2%), representing top value OSCs. Furthermore, significantly improves operational stability air two times T80 lifetime over 500 h. This study highlights potential using additives fabricate stable air, promoting industrialization

Язык: Английский

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Perylene diimide cathode interface layer with siloxane bay-modification for efficient and stable organic solar cells

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161155 - 161155

Опубликована: Март 1, 2025

Язык: Английский

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