A review on flexible solar cells

Science China Materials, Journal Year: 2024, Volume and Issue: 67(9), P. 2717 - 2736

Published: July 8, 2024

Language: Английский

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A Novel Multiple‐Ring Aromatic Spacer Based 2D Ruddlesden–Popper CsPbI₃Solar Cell with Record Efficiency Beyond 16%

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(35)

Published: June 22, 2022

Abstract Two‐dimensional (2D) Ruddlesden–Popper (RP) CsPbI 3 perovskite possesses superior phase stability by introducing steric hindrance. However, due to the quantum and dielectric confinement effect, 2D structures usually exhibit large exciton binding energy, charge tunneling barrier across organic interlayer is difficult eliminate, resulting in poor transport performance. Here, a multiple‐ring aromatic ammonium, 1‐naphthylamine (1‐NA) spacer developed for RP solar cell (PSC). Theoretical simulations experimental characterizations demonstrate that using 1‐NA with extended π‐conjugation lengths reduces energy facilitates efficient separation of excitons. In addition, its cations have significant contribution conduction band, which can reduce bandgap, promote electronic coupling between inorganic layers, improve transport. Importantly, strong π–π conjugation enhance intermolecular interactions hydrogen bonding, prepare high‐quality films preferred vertical orientation, lower defect density, directional As result, 2 (Cs) Pb 4 I 13 PSC exhibits record 16.62% performance enhanced stability. This work provides an approach device developing spacers.

Language: Английский

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Achieving improved stability and minimal non-radiative recombination loss for over 18% binary organic photovoltaics via versatile interfacial regulation strategy

Science China Chemistry, Journal Year: 2022, Volume and Issue: 65(8), P. 1623 - 1633

Published: July 20, 2022

Language: Английский

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Natural Materials for Sustainable Organic Solar Cells: Status and Challenge

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(15)

Published: Jan. 23, 2023

Abstract The exploitation of natural materials has received growing attention because the needs environmental sustainability. In contrast to petroleum‐based synthetic materials, possess significant advantages abundant, low‐cost, degradable, and renewable. Here, recent research status as flexible substrate, cathode interfacial material, anode material for organic photovoltaics (OPVs) are first presented. Then, confronted key challenges that limit widespread application OPVs is summarized, including complex multilength scaled aggregation morphology, non‐conjugated structure, unclear working mechanism. Finally, their potential solutions from perspective chemical structure proposed constructing efficient OPVs. It believed have a broad landscape in low‐cost green manufacturing technology future.

Language: Английский

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Mitigating Detrimental Effect of Self‐Doping Near the Anode in Highly Efficient Organic Solar Cells

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(16)

Published: Jan. 20, 2023

Abstract Poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) has been one of the most established hole transport layers (HTL) in organic solar cells (OSCs) for several decades. However, presence PSS − ions is known to deteriorate device performance via a number mechanisms including diffusion HTL‐active layer interface and unwanted local chemical reactions. In this study, it shown that can also result p ‐doping high efficiency donor:non‐fullerene acceptor blends – resulting photocurrent loss. To address these issues, facile effective approach reported improve OSC through two‐component consisting self‐assembled monolayer 2PACz ([2‐(9H‐Carbazol‐9‐yl)ethyl]phosphonic acid) PEDOT:PSS. The power conversion (PCE) 17.1% using devices with PEDOT:PSS HTL improved 17.7% when PEDOT:PSS/2PACz used. attributed overlaid preventing formation an intermixed ‐doped ion rich region (≈5–10 nm) at bulk heterojunction‐HTL contact interface, decreased recombination losses stability. Moreover, found reduce electrical shunts ultimately yield large area PCE enhanced from 12.3% 13.3% 1 cm 2 cells.

Language: Английский

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Polymer Photocatalysts Containing Segregated π‐Conjugation Units with Electron‐Trap Activity for Efficient Natural‐light‐driven Bacterial Inactivation

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(48)

Published: Oct. 16, 2023

Development of highly efficient and metal-free photocatalysts for bacterial inactivation under natural light is a major challenge in photocatalytic antibiosis. Herein, we developed an acidizing solvent-thermal approach inserting non-conjugated ethylenediamine segment into the conjugated planes 3,4,9,10-perylene tetracarboxylic anhydride to generate photocatalyst containing segregated π-conjugation units (EDA-PTCDA). Under light, EDA-PTCDA achieved 99.9 % Escherichia coli Staphylococcus aureus (60 45 min), which highest efficiency among all antibacterial reports. The difference surface potential excited charge density corroborated possibility built-in electron-trap effect segments EDA-PTCDA, thus forming active EDA-PTDA/bacteria interface. In addition, exhibited negligible toxicity damage normal tissue cells. This catalyst provides new opportunity antibiosis conditions.

Language: Английский

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Stable Organic Solar Cells Enabled by Simultaneous Hole and Electron Interlayer Engineering

Energy & environment materials, Journal Year: 2024, Volume and Issue: 7(5)

Published: May 11, 2024

The development of high‐performance organic solar cells (OSCs) with high operational stability is essential to accelerate their commercialization. Unfortunately, our understanding the origin instabilities in state‐of‐the‐art OSCs based on bulk heterojunction (BHJ) featuring non‐fullerene acceptors (NFAs) remains limited. Herein, we developed NFA‐based using different charge extraction interlayer materials and studied storage, thermal, stabilities. Despite power conversion efficiency (PCE) (17.54%), found that self‐assembled monolayers (SAMs) as hole‐extraction interlayers exhibited poor stability. time required for these reach 80% initial performance (T 80 ) was only 6 h under continuous thermal stress at 85 °C a nitrogen atmosphere 1 maximum point tracking (MPPT) vacuum. Inserting MoO x between ITO SAM enhanced T 50 ~15 after tests, respectively, while maintaining PCE 16.9%. Replacing PDINN electron transport layer ZnO NPs further enhances cells' stability, boosting 1000 170 h, respectively. Our work reveals synergistic roles charge‐selective device architecture developing efficient stable OSCs.

Language: Английский

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Exploring Acceptor-Functionalized Perylenes as Hole Transport Materials for Solution Process Organic Light-Emitting Diodes

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: 6(5), P. 3874 - 3883

Published: May 10, 2024

The high charge carrier mobility and organized solid-state structure of perylene-based materials enable them to be used in optoelectronics. impressive luminance organic light-emitting diodes (OLEDs) helps improving visibility for both indoor outdoor activities. Considering the good structures, we report three molecular systems viz. PhPrPy, AnPrPy, TPAPrPy, integrated with functionalized pyridines, leading formation donor–acceptor (D–A) which were finally explored as hole transport (HTMs) solution-process OLEDs. pyridine units phenyl, p-methoxyphenyl, triphenylamine functionalities. For theoretical screening, density functional theory was adopted evaluating molecules their optimized geometries, highest occupied orbital/lowest unoccupied orbital energy levels, reorganization energies, electron distribution excited states. energies ionization potentials indicated possible capability transportation. studies revealed that incorporation a unit framework significantly reduced energy. Based on predictions, chose TPAPrPy most promising one device fabrication. fabricated green phosphorescent OLED HTM showed performance power efficacy (PE), current (CE), external quantum efficiency (EQE) ∼77 lm/W, ∼78 cd/A ∼22%, respectively. Given PE, CE, EQE present device, important outcome using balance between low trade-off. Importantly, roll-off observed when measured at brightness 100 1000 cd/m2.

Language: Английский

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N-type small molecule electrolyte cathode interface layer with thickness insensitivity for organic solar cells

Nano Energy, Journal Year: 2024, Volume and Issue: 128, P. 109890 - 109890

Published: June 14, 2024

Language: Английский

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A robust and thickness-insensitive hybrid cathode interlayer for high-efficiency and stable inverted organic solar cells

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(35), P. 18723 - 18732

Published: Jan. 1, 2023

A robust and thickness-insensitive cathode interlayer (PFOPy-N) consisting of a cross-linkable interfacial polymer (PFOPy) n-type self-doped molecule (PDINN) is developed for high-efficiency stable inverted organic solar cells.

Language: Английский

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