All Roads Lead to Rome: Isomers with Divergent Cathode Modification Mechanisms toward Ohmic Contact

Journal of the American Chemical Society, Год журнала: 2024, Номер unknown

Опубликована: Окт. 25, 2024

Cathode interfacial layers (CILs) hold utmost importance for achieving ohmic contact at the organic semiconductor-cathode interface of photovoltaic devices. Delving deep into diverse design principles and working mechanisms is great significance designing novel CILs with high performance. Herein, two nonamine-based are designed: one featuring a cyclopentadiene unit, designated as CIL-cp; while other, lacking cyclopentadiene, referred to CIL-ph, which an isomer CIL-cp. The subtle changes in chemical structures result distinct modification toward contact. On hand, robust electron-withdrawing characteristic endows CIL-cp lower energy levels, resulting dipole active layer-CIL-cp due electron transfer from D18 other CIL-ph exhibits strong CIL-Ag interface, significantly reduces work function (W

Язык: Английский

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In-Depth Analysis of Electron and Hole Transport Layers for Enhancing Ca₃PI₃ Solar Cell Efficiency through Advanced Numerical Simulation

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

This study investigates lead-free calcium–phosphorus iodide (Ca3PI3) perovskite solar cells with various electron transport layers (ETLs) like TiO2 and SnS2 hole (HTLs) such as CuO, MoO3, P3HT, Sb2S3, CuSbS2, GeSe. The ideal HTL, was chosen, its performance simulated by using the SCAPS-1D tool. Two device structures were analyzed: device-I (Al/FTO/TiO2/Ca3PI3/MoO3/Ni) device-II (Al/FTO/SnS2/Ca3PI3/MoO3/Ni). Various parameters carefully optimized to achieve best performance, including donor acceptor densities, defect density, thickness, series shunt resistances, generation-recombination dynamics, current density (IV), quantum efficiency (QE%), temperature. top-performing achieved a power conversion (PCE) of 29.02%, VOC 1.288 V, JSC 25.235 mA/cm2, fill factor (FF) 89.26%. Device II showed PCE 26.47%, 1.2486 25.233 FF 84.01%. These results emphasize promise for high-performance Ca3PI3-based photovoltaic applications.

Язык: Английский

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Phosphates Modulated NiO_x HTL toward a Lower V_oc Loss in Wide Bandgap Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 13, 2024

Abstract The combination of p‐type NiO x and self‐assembled monolayers (SAMs) has recently emerged as an optimal structure for hole transport layer (HTL) in wide‐bandgap perovskite solar cells (WBG PSCs). However, the unique requirements this cascade HTL system differ significantly from those neat . Specifically, tendency to agglomerate can lead poor film morphology inadequate interfacial contact with SAMs, resulting significant open‐circuit voltage ( V oc ) loss PSCs. Herein, these issues are addressed by incorporating sodium hexametaphosphate (SHMP) into ink. This approach enhances dispersibility nanoparticles, improving conductivity films through interactions between P = O P‐O groups Ni ions. Additionally, SHMP promotes better Me‐4PACz interface increasing number hydroxyl on uniform surface films. Consequently, a high power conversion efficiency (PCE) 21.02% is achieved WBG (1.79 eV) PSCs smallest relative 24.69%. encapsulated devices exhibit excellent stability under humidity elevated temperatures. Furthermore, when combined Sn‐Pb narrow‐bandgap perovskite, PCE 27.66% attained 2‐terminal tandem (TSCs).

Язык: Английский

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Defect Passivation Enabled by Amphiphilic Polymer Additives for Perovskite Solar Cells with Suppressed Charge Recombination

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 12(19), С. 7434 - 7442

Опубликована: Апрель 26, 2024

Harmful defects are typically major performance and stability degrading factors in perovskite solar cells (PSCs). In order to prevent defect formation ion migration, some small molecule additives often used PSCs, which, however, highly volatile very likely drift. this work, an amphiphilic polymer, p(HEMA-co-DEAMA), is synthesized doped into organic salt solution. Through Lewis base coordination hydrogen bonding, it can be chemically bonded a perovskite. Further analysis reveals that trap density significantly reduced after simple treatment with suppressing charge recombination boosting the power conversion efficiency (PCE) of PSCs. Moreover, ordered long chain structure p(HEMA-co-DEAMA) forms gridlike crystal, which stitches grain boundaries thus modulates growth crystals therein. Importantly, exposure alkyl chains on also provides hydrophobic coating, protects film from environmental humidity further enhances operation stability. Therefore, unpackaged devices modified exhibit excellent retaining more than 90% original PCE when stored for 1000 h air environment, indicating viability our strategies.

Язык: Английский

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Synergistic Toughening and Strain Releasing Strategy in Metal Halide Perovskite Photovoltaics

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 24, 2024

Abstract Metal halide perovskite with high Young's modulus is prone to form cracks when subjected mechanical stresses such as bending, twisting, or impacting, ultimately leading a permanent decline in the performance of their photovoltaic devices. These properties pose challenges durability long‐term service devices and production flexible To address this issue, poly (lipoic acid‐co‐Styrene) elastomer employed modulate films. The peak force quantitative nanomechanical atomic microscopy measurements nanoindentation tests demonstrated reduction modulus, lower preventing formation defects during deformation. Moreover, approach also suppressed non‐radiative recombination solar cells by leveraging interaction between functional groups defects. Through method, rigid inverted attained power conversion efficiency 24.42% alongside remarkable stability. Concurrently, achieved 22.21%. This strategy offers promising avenue for fabricating enhancing durability.

Язык: Английский

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Surface Regulation via Carboxylate Polymer for Efficient and Stable CsPbI₂Br Perovskite Solar Cells

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 7, 2024

Abstract CsPbI 2 Br perovskite solar cell (PSC) is a promising candidate for high‐efficiency single‐junction and tandem cells. However, due to the numerous surface defects of film mismatch energy levels at Br/charge transport layer interface, power conversion efficiency (PCE) PSC still significantly lower than theoretical limits. To alleviate those issues, in this work, carboxylate‐based p‐type polymer, TTC‐Cl, employed modify layer. TTC‐Cl can interact with uncoordinated Pb 2+ , thereby mitigating surficial reducing non‐radiative recombination losses. Furthermore, also improves band properties thin surface, rendering it more p‐type, which facilitates hole transport. Consequently, PSCs modification achieve remarkable PCE 17.81%, notably higher that counterpart without (15.87%). Moreover, exhibit better stability. This work highlights importance regulation via carboxylate polymer further enhancing performance PSCs.

Язык: Английский

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High-Performance and Stable Perovskite/Organic Tandem Solar Cells Enabled by Interconnecting Layer Engineering

ACS Nano, Год журнала: 2024, Номер unknown

Опубликована: Дек. 23, 2024

Perovskite/organic tandem solar cells (PO-TSCs) have recently attracted increasing attention due to their high efficiency and excellent stability. The interconnecting layer (ICL) is of great importance for the performance PO-TSCs. charge transport (CTL) recombination (CRL) that form ICL should be carefully designed enhance carrier extraction promote balance from two subcells. Here, we propose an effective strategy optimize by using [2-(9

Язык: Английский

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TiO2/perovskite interface with oxyacid salt for efficient carbon-based CsPbI2Br solar cell: The chemical adsorption induced surface electron transfer modulates energy level

Solar Energy, Год журнала: 2025, Номер 288, С. 113328 - 113328

Опубликована: Фев. 5, 2025

Язык: Английский

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Defect Control and Strain Regulation Enabled High Efficiency and Stability in Flexible Perovskite Solar Cells

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Фев. 13, 2025

Flexible perovskite solar cells (f-PSCs) show unique charm in the electronics industry due to their mechanical flexibility, portability, and compatibility with curved surfaces. However, severe interfacial defects residual tensile strain remain pivotal limitations performance stability. Here, a novel strategy using 4-amino-2-(trifluoromethyl) benzonitrile (ATMB) multiple functional groups (−NH2, −CF3, −C≡N) is proposed modify interface of perovskite/Spiro-OMeTAD, realizing significant improvements both efficiency stability PSCs. The comprehensive defect passivation effects ATMB result great reduction density on surface grain boundaries films. Moreover, introduction as top layer reduces Young's modulus films then releases stress. Furthermore, modification induces an upshift valence band perovskite, facilitating hole extraction. Consequently, rigid PSC attained best PCE 22.46%, f-PSC achieved 21.42% modification, significantly exceeding PCEs 20.32% 19.01% control devices. combined phytic acid (PA)-doped SnO2, 23.04% 21.66% were obtained for flexible PSCs, respectively. humidity stability, light flexibility devices obviously increased.

Язык: Английский

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Construction of novel D-A type self-assembled molecules together with NiOx for flexible perovskite solar cells

Tetrahedron, Год журнала: 2025, Номер unknown, С. 134541 - 134541

Опубликована: Фев. 1, 2025

Язык: Английский

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