Narrowband Organic Photodetectors: From Fundamentals to Prospects

Advanced Optical Materials, Год журнала: 2024, Номер 12(31)

Опубликована: Авг. 27, 2024

Abstract Organic photodetectors (OPDs) have achieved rapid development due to the emergence of organic semiconducting materials with high absorption coefficient and tunable optical bandgap, as well progress in device physics engineering. The working mechanism fundamental parameters OPDs are briefly introduced. Some smart strategies for realizing performance photovoltaic type narrowband (PV‐NB‐OPDs) photomultiplication (PM‐NB‐OPDs) comprehensively reviewed. recent PV‐NB‐OPDs PM‐NB‐OPDs is systematically introduced from fundamentals prospects, exhibiting colorful application potential full‐color imaging, spectroscopic photodetection, medical monitoring, communication, which may promote their applications.

Язык: Английский

---

Cascaded Energy and Charge Transfer Synergistically Prompting 18.7% Efficiency of Layered Organic Solar Cells with 1.48 eV Bandgap

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 2, 2025

Abstract Series of layer‐by‐layer organic solar cells (LOSCs) are constructed by sequentially spin‐coating donor layer and acceptor layers. A champion power conversion efficiency (PCE) 18.79% is achieved from the LOSCs with PBQx‐TCl/ITIC/PY‐DT as active layers, which should be one top values among OSCs optical bandgap over 1.48 eV. The middle material ITIC has a complementary photon harvesting range PBQx‐TCl PY‐DT, leading to enhanced Meanwhile, can play vital role in energy charge transfer relay increase exciton utilization transport, confirmed varied FFs normal or inverted ITIC/PY‐DT PY‐DT/ITIC Over 7% PCE improvement employing form cascaded This work may provide an efficient strategy for improving performance LOSCs.

Язык: Английский

---

Over 19.2% Efficiency of Layer‐By‐Layer Organic Photovoltaics by Ameliorating Exciton Dissociation and Charge Transport

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 26, 2025

Abstract Layer‐by‐layer (LbL) organic photovoltaics (OPVs) are fabricated with polymer PM1 as donor and small molecule L8‐BO acceptor by employing sequential spin‐coating technology. The BTP‐eC9 PTAA deliberately selected for individually incorporating into layer layer, resulting in the power conversion efficiency (PCE) increased from 18.22% to 19.23%. improvement of performance is attributed synergistically short circuit current density ( J SC ) 27.78 mA cm −2 fill factor (FF) 78.23%. introduction can promote photogenerated exciton dissociation, especially excitons near anode. Meanwhile, molecular crystallinity also enhanced appropriate layer. incorporation provide hole transport channels effectively improve holes generated self‐dissociation L8‐BO, FFs 77.40% synergistic effects layers result a 19.23% PCE optimized LbL‐OPVs. This work demonstrates that there great room hierarchically optimize achieving highly efficient

Язык: Английский

---

The Phase Separation Control in All‐Polymer Solar Cells

SusMat, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

ABSTRACT All‐polymer solar cells (all‐PSCs) are of interest owing to their unique advantages, including remarkably improved device stability and exceptional mechanical stretchability. Over recent years, there has been a notable increase in the power conversion efficiency (PCE) all‐PSCs, largely attributed advancements morphology control active layer. Notably, domain size is paramount importance as it impacts critical factors such exciton dissociation, charge transport, collection. However, low glass transition temperature conjugated polymers, coupled with minimal change mixing entropy, often results an excessive degree phase separation. Consequently, essential comprehend evolution separation develop strategies regulate size. In this review, we elucidate key parameters that contribute enhancement present qualitative quantitative characterization techniques for Building on foundation, introduce principles regulating sizes, encompassing crystallinity, miscibility, molecular conformation from thermodynamic perspective, well film‐forming kinetics crystallization sequence kinetic perspective. Lastly, offer insights into current challenges potential future prospects all‐PSCs.

Язык: Английский

---

Layered All‐Polymer Solar Cells with Efficiency of 18.34% by Employing Alloyed Polymer Donors

Small, Год журнала: 2025, Номер 21(11)

Опубликована: Фев. 7, 2025

Abstract A series of layered all‐polymer solar cells (LA‐PSCs) with the normal or inverted structure are prepared by employing a sequential spin‐coating method PBQx‐TCl, PM1 as polymer donor, and PY‐DT acceptor. The power conversion efficiency (PCE) LA‐PSCs can be improved from 17.20% to 18.34% incorporating 30 wt.% into PBQx‐TCl layer, resulting simultaneously increased J SC 25.35 mA cm −2 , V OC 0.971 FF 74.49%. PCE improvement also achieved PBQx‐TCl:PM1 donor layers. mixed prefer form alloyed states in LA‐PSCs, which confirmed gradually s more content Meanwhile, photogenerated excitons layers dissociated at interface between PM1, especially for located near ITO electrode. exciton dissociation provide an additional channel improving utilization efficiency, positive external quantum spectral difference (∆EQE) values Over 6.6% realized using layer.

Язык: Английский

---

Leveraging Compatible Iridium(III) Complexes to Boost Performance of Green Solvent‐Processed Non‐Fullerene Organic Solar Cells

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 18, 2024

Abstract In organic solar cells (OSCs), the short exciton lifetime poses a significant limitation to diffusion and dissociation. Extending suppressing recombination are crucial strategies for improving OSC performance. Herein, an effective approach is proposed by introducing phosphorescent emitter, tris(2‐(4‐(tert‐butyl)phenyl)‐5‐fluoropyridine)Iridium(III), with long‐lived triplet in OSCs. This research reveals that steric structure of fac ‐Ir(tBufppy) 3 exhibits excellent compatibility both donor PM6 acceptor BTP‐eC9, maintaining efficiencies over 90% even 30% third component loading. Moreover, 10% addition mitigates excessive aggregation optimizing active layer morphology fill factor. Transient absorption spectroscopy transient photoluminescence measurements demonstrate introduction significantly extends lifetimes suppresses recombination, which increases short‐circuit current ( J SC ). Ultimately, employing non‐halogenated solvent o‐xylene processing, impressive power conversion efficiency (PCE) 18.54% achieved devices based on PM6:10% :BTP‐eC9, surpassing binary PM6:BTP‐eC9 (17.41%). work provides promising further improve PCEs OSCs iridium(III) complex as component.

Язык: Английский

---

Dual-Donor-Induced Crystallinity Modulation Enables 19.23% Efficiency Organic Solar Cells

Nano-Micro Letters, Год журнала: 2024, Номер 17(1)

Опубликована: Ноя. 27, 2024

Abstract Trap-assisted charge recombination is one of the primary limitations restricting performance organic solar cells. However, effectively reducing presence traps in photoactive layer remains challenging. Herein, wide bandgap polymer donor PTzBI-dF demonstrated as an effective modulator for enhancing crystallinity bulk heterojunction active layers composed D18 derivatives blended with Y6, leading to dense and ordered molecular packings, thus, improves photoluminescence quenching properties. As a result, photovoltaic devices exhibit reduced trap-assisted losses, achieving optimized power conversion efficiency over 19%. Besides enhancement, comprised third component simultaneously attain decreased current leakage, improved carrier mobilities, suppressed bimolecular recombination, energy losses. The advanced crystalline structures induced by its characteristics, such well-aligned level, complementary absorption spectra, are ascribed promising improvements. Our findings suggest that phase engineering feasible approach tuning packings layer, providing guidelines designing morphology modulators high-performance

Язык: Английский

---

Design and virtual screening of donor and non-fullerene acceptor for organic solar cells using long short-term memory model

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(35), С. 23859 - 23871

Опубликована: Янв. 1, 2024

In this study, we trained long short-term memory models to predict photovoltaic performance parameters. Additionally, cleaved and reorganized molecules obtain novel high-performance donor–acceptor pairs.

Язык: Английский

---

Steric modulation of tetradentate platinum(II) bis-carbene complex enables over 18.4% efficiency of layer-by-layer all-polymer solar cells

Nano Energy, Год журнала: 2024, Номер 130, С. 110174 - 110174

Опубликована: Авг. 23, 2024

Язык: Английский

---

An Arginine-Doped Cathode Interlayer Enables Enhanced Efficiency in Organic Solar Cells

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

The appearance of the cathode interlayer (CIL), a transition bridge between and organic photoactive layer (OPL), provides new pathway for performance improvement solar cells (OSCs). PFN-Br is widely employed in many optoelectronic devices, including nonfullerene OSCs, to transport electrons improve charge injection at interface. However, due relatively low conductivity PFN-Br, thickness CIL prepared with usually less than 10 nm, which evidently contradicts requirements large-scale roll-to-roll manufacturing. Herein, strategy using N-α-carbobenzyloxy-d-Arginine (NA) as doping material proposed PFN-Br. homogeneous distribution NA can modify work function (WF) facilitate an interface dipole arrangement that favorable transfer, resulting binary CILs tunable WF increased conductivity. To verify this method, series devices were PBDB-T:IT-M or PM6:Y6 OPL different proportions CIL. use PFN-Br:NA (0.75:0.06, weight%) helps morphology, making it exhibit trend fiber network structure, leading higher fill factor short circuit current density. Consequently, optimal power conversion efficiency (PCE) based on from 10.5% 11.1% 15.4% 16.0%, respectively. In addition, NA-doped device exhibits better nitrogen stability after 360 h dark storage compared control. discovery these modification approaches insight into hybrid interlayers required efficient reliable OSCs.

Язык: Английский

---