Regulation of Wide Bandgap Perovskite by Rubidium Thiocyanate for Efficient Silicon/Perovskite Tandem Solar Cells

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 22, 2024

Abstract Developing high‐quality wide bandgap (WBG) perovskites with ≈1.7 eV ( E g ) is critical to couple silicon and create efficient silicon/perovskite tandem devices. The sufferings of large open‐circuit voltage V OC loss unstable power output under operation continuously highlight the criticality fully develop WBG perovskite films. In this study, rubidium thiocyanate as additive regulators in are incorporated, significantly reducing non‐radiative recombination, ion‐migration, phase segregation. optimized 1.66 solar cells achieved state‐of‐art 1.3 (0.36 deficit), delivered a stabilized conversion efficiency 24.3%, along good device stability (20% degradation (T 80 after over 994 h 1 sun at ≈65°C). When integrated flat front side cell, two‐terminal (30% efficient) obtained 1.97 , T 90 operational lifetime more than 600 room temperature.

Язык: Английский

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Efficient wide-bandgap perovskite photovoltaics with homogeneous halogen-phase distribution

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Окт. 15, 2024

Wide-bandgap (WBG) perovskite solar cells (PSCs) are employed as top of tandem to break through the theoretical limits single-junction photovoltaic devices. However, WBG PSCs exhibit severe open-circuit voltage (V

Язык: Английский

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Temperature-dependent self-trapped exciton emission in Cu(I) doped zinc-based metal halides from well-resolved excited state structures

Nano Research, Год журнала: 2024, Номер 17(8), С. 7768 - 7775

Опубликована: Май 2, 2024

Язык: Английский

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Homogenizing the Halogen Distribution via a Multifunctional Fluorine‐Containing Additive Toward High‐Performance Inverted Wide‐Bandgap Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 21, 2025

Abstract Wide‐bandgap perovskite solar cells, which are essential for tandem photovoltaics, easily suffer from open‐circuit voltage ( V OC ) losses due to challenges in suppressing halogen heterogeneity and defect‐related nonradiative recombination the active layers. Herein, a multifunctional fluorine‐containing additive of 8‐pentafluorobenzyloxy quinoline (8‐PFBQ) is explored modulate crystallization defect properties wide‐bandgap (1.67 eV) perovskites, enhancing both efficiency operational stability ensuing cells. It demonstrated that group 8‐PFBQ can strongly coordinate with lead ions fluorinated benzyl effectively interacts organic halides through anion‐π hydrogen bonding interactions simultaneously. These synergistic effects improve crystal quality composition homogeneity, holistically reducing defects The resulting cells achieve champion power conversion 22.22%, featuring high 1.243 two‐fold enhancement stability. This work presents an alternative strategy management offering insights advancements single‐junction photovoltaics.

Язык: Английский

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Suppression of Light-Induced Phase Segregations in Mixed Halide Perovskites through Ligand Passivation

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 1760 - 1768

Опубликована: Фев. 11, 2025

Mixed halide perovskites (MHPs) are useful for tandem solar cells and optoelectronic devices due to their absorption emission tunability over the whole visible spectrum improved stability. However, one of main challenges is phase segregation under continuous illumination or applied bias, which hinders utilization applications with full potential. Here, in this letter, we studied MHPs, especially a focus CsPbI1.5Br1.5 325 nm laser through photoluminescence (PL) spectroscopy real-time video illumination. We provided remedy prevent unwanted using 1-dodecanthiol (DSH) ligand treatment. It also observed that, during relaxation dark conditions, PL characteristics can even be reverted original condition. Following passivation, film sustain almost 4 min high-power irradiation without any degradation segregation, as spectroscopy. Thereafter, negligible separation occurs after exposure light min. A demonstrates efficacy DSH suppression dispersion. The observation supported by density functional theory calculations, showing that effectively passivate vacancies suppress

Язык: Английский

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Contact Potential Homogenization via Buried Interface Engineering Enables High‐Performance Wide‐Bandgap Perovskite Photovoltaics

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 25, 2025

Abstract Microscale imperfections and inhomogeneity at buried interface leads to energy losses insufficient carrier extraction of wide bandgap (WBG) perovskite solar cells (PSCs). Here, we report a collaborative strategy by introducing 3‐aminopropanoic acid (3‐APA) mix with [4‐(3,6‐dimethyl‐9H‐carbazol‐9‐yl)butyl]phosphonic (Me‐4PACz) as hole‐selective self‐assembled monolayer (SAM). With the addition 3‐APA, wettability precursors is increased. Furthermore, film morphology heterogeneity improved. As result, nonradiative recombination interfacial loss are greatly suppressed. This also marginally higher ionization potential monolayers, approximating valence band film. Benefits from suppressed charge transfer loss, mixed SAM present overcome passivation transport trade‐off, delivering V OC × FF 84.5% S–Q limit. The combine benefits enable efficient 1.67 eV WBG PSCs power conversion efficiency 22.4% high open circuit voltage 1.255 fill factor 85.5%. Under strategy, demonstrat all‐perovskite tandem 28.4%.

Язык: Английский

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Improvement of Photovoltaic Performance of Perovskite Solar Cells by Synergistic Modulation of SnO₂ and Perovskite via Interfacial Modification

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(19), С. 24748 - 24759

Опубликована: Май 1, 2024

In the past decade, perovskite solar cell (PSC) photoelectric conversion efficiency has advanced significantly, and tin dioxide (SnO2) been extensively used as electron transport layer (ETL). Due to its high mobility, strong chemical stability, energy level matching with perovskite, easy low-temperature fabrication, SnO2 is one of most effective ETL materials. However, material an limitations. For example, films prepared by spin-coating contain a large number oxygen vacancies, resulting in loss open-circuit voltage (VOC) loss. addition, crystal quality perovskites closely related substrate, disordered orientation will lead ion migration, uncoordinated Pb2+ defects. Therefore, interface optimization essential improve stability PSC. this work, 2-(5-chloro-2-benzotriazolyl)-6-tert-butyl-p-cresol (CBTBC) was introduced for modification. On hand, hydroxyl group CBTBC forms Lewis mixture Sn atom, which reduces vacancy defect prevents nonradiative recombination. other SnO2/CBTBC can effectively influencing crystallization kinetics nitrogen element passivate defects at SnO2/perovskite interface. Finally, prevailing PCE PSC (1.68 eV) modified 20.34% (VOC = 1.214 V, JSC 20.49 mA/cm2, FF 82.49%).

Язык: Английский

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Effects of halogens and alkali metals on guanidinium-ethylammonium hybrid-doped perovskite photovoltaic devices

Hybrid Advances, Год журнала: 2024, Номер 6, С. 100252 - 100252

Опубликована: Июль 24, 2024

Effects of substitution halogen anions and addition alkali metal cations for guanidinium (GA)-ethylammonium (EA) hybrid-doped perovskite solar cells were investigated by fabricating devices comparing their photovoltaic properties. The compositions the additives found to contribute improvement preferred orientations crystals, order effectiveness was I, Cl, Br. In addition, contributed conversion efficiencies, 3 % cesium at CH3NH3 site most effective. It also that short-circuit current densities fill factors depended on (100) crystal orientation compounds.

Язык: Английский

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A negatively-charged supramolecular trap for precisely catching strontium ion

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Март 17, 2025

Due to the analogous physicochemical properties and weak coordination ability of alkali alkaline earth metals, accurate separation radioactive 90Sr from groundwater or seawater still presents a big challenge in environmental radioactivity remediation. Here we mimic complexation behavior molecular crown-ether carboxylic acids construct an elegant negatively charged supramolecular trap anionic crown ether-based metal-organic framework (ZJU-X99) for precisely catching Sr2+. Owing synergistic effects electrostatic interactions arising In(COO)4- nodes host-guest recognition 18-crown-6 rings, ZJU-X99 exhibits rapid adsorption kinetics (1 min), high capacity (263 mg/g), exceptional selectivity Sr2+ even when 1000-fold Na⁺, K⁺ Cs⁺ coexist. Relative ions are intricately ensconced within trap, resulting lowest binding energy minimal structural alterations. Dynamic column experiments decontamination trials further validate its practical application prospects. Our findings offer valuable insights into design frameworks featuring tailored sites targeted ions. Accurate remains Here, authors

Язык: Английский

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Optimization of crystallization dynamics in wide-bandgap bromine–iodine perovskite films for high-performance perovskite–organic tandem solar cells

Energy & Environmental Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

By introducing moroxydine hydrochloride to optimize the crystallization of wide-bandgap perovskites, phase separation halides was suppressed, achieving a PCE 18.76%. This technology significantly improved photothermal stability.

Язык: Английский

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