Cs3Bi2Cl3Br6:g-C3N4 Nanostructure-Based Thin Film Photocatalysts for Hydrogen Production under Daylight and Simulated Light DOI

Dattatray Namdev Sutar,

Ashna K. Pramod,

Hafijul Islam

и другие.

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(22), С. 25556 - 25568

Опубликована: Ноя. 3, 2024

The strategic design of nanocomposites and their rationally constructed heterojunctions offer an effective approach for enhancing light harvesting optimizing energy conversions. Herein, we report the synthesis aqueous-stable, lead-free Cs3Bi2Cl3Br6 perovskite integrated with g-C3N4. An excellent band alignment Cs–Bi-based g-C3N4 was achieved by tuning anion in perovskite, leading to remarkable photocatalytic performance. construction a hybrid nanocomposite thin film device impressive hydrogen generation rate 341 μmol h–1 g–1, which is 16 times higher than that perovskite@g-C3N4 powder form. test results are albeit when quartz reactor used, where 20 mg optimized catalyst reaches up 539 g–1 apparent quantum efficiency (AQE) 1.32%. Spectroscopic studies, including photoluminescence (PL) time-correlated single photon counting (TCSPC), have established presence long-lived charge-separated state confirmed excited electron injection into Cs3Bi2Cl3Br6@g-C3N4 not only accelerate charge transfer but also significantly enhance evolution stability photocatalysts.

Язык: Английский

Sr2AlTaO6: Ni2+ phosphors with excellent IQE and thermal stability as NIR-II source for night vision, nonvisual detection, and far-field imaging DOI
Fengmei Zhu, Yuan Gao,

J. F. Qiu

и другие.

Chemical Engineering Journal, Год журнала: 2025, Номер 505, С. 159559 - 159559

Опубликована: Янв. 13, 2025

Язык: Английский

Процитировано

7
Fe3+-activated BaZrO3 with broadband NIR-II phosphor for large-area Illumination, non-visual and biomedical imaging DOI
Yi Zhang, Fengmei Zhu, Hao Song

и другие.

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161473 - 161473

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

4
An Er3+-Doped Cs2NaScCl6 Lead-Free Double Perovskite with Efficient Broadband Visible to Near-Infrared Emission and Multimodal Upconversion Luminescence DOI
Chunli Zhao, Yuan Gao, Tiantian Song

и другие.

The Journal of Physical Chemistry Letters, Год журнала: 2023, Номер 14(40), С. 9011 - 9018

Опубликована: Окт. 2, 2023

Lanthanide ions are widely used as dopants for halide perovskites their broad energy level coverage from the visible to near-infrared (NIR) range. In this work, Cs2NaScCl6:Er3+ was synthesized by an improved solid-state reaction method, which showed effective NIR emission under ultraviolet excitation. Through calculations based on density functional theory and Bader charge analysis, it is shown that [ErCl6]3- octahedra show a strong localization effect in lattice, conducive transfer process of Cl-Er3+, sensitization responsible efficient luminescence Er3+, where around λem = 1540 nm originated Er3+:4I13/2 → 4I15/2 transition with ultrahigh photoluminescence quantum yield reached ∼28.3%. Notably, also exhibited bright upconversion green light (at 540 nm) excitation variety laser diodes (808, 980, 1550 via self-sensitization processes.

Язык: Английский

Процитировано

37
Achieving Multicolor Emitting of Antimony-Doped Indium-Based Halide Perovskite via Monovalent Metal Induced Phase Engineering DOI
Chunli Zhao, Yuan Gao, Jianbei Qiu

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(51), С. 59610 - 59617

Опубликована: Дек. 15, 2023

Lead-free metal halide perovskites have attracted attention because of their excellent optical properties and nontoxicity. Here, we report the synthesis Sb3+-doped indium perovskite Cs2InCl5·H2O:Sb3+ by an improved solution coprecipitation method. The treatment with selected monovalent cation halides led to Cs2MInCl6 (Ag+, K+, Na+) in different crystal structures or phases. Sb3+ has isolated ns2 electron, acts as luminescence center exhibits bright broadband emission that originated from self-trapped excitons. Under UV light excitation, these phosphors emitted multicolored ranging blue, green, yellow, red depending on whether not which ion was used. phosphor samples were used print high-resolution 2D color barcodes for security anticounterfeiting applications. study presented here provides a new approach design lead-free unique properties.

Язык: Английский

Процитировано

26
A Nickel-doped, lanthanum gallium germanate-based phosphor as an ultra-broadband short-wavelength infrared region emitter for optical imaging DOI

Mengdie Tan,

Yuan Gao, Jiayuan Chen

и другие.

Ceramics International, Год журнала: 2024, Номер 50(13), С. 23685 - 23693

Опубликована: Апрель 10, 2024

Язык: Английский

Процитировано

15
Long-Wavelength Near-Infrared MgIn2O4:Ni2+ Phosphor with 47.93% IQE and 34.66% EQE for Night Vision Lighting, Nonvisual Detection, and Biological Imaging DOI
Fengmei Zhu, Yu Deng, Yuan Gao

и другие.

ACS Materials Letters, Год журнала: 2024, Номер 6(10), С. 4555 - 4563

Опубликована: Сен. 3, 2024

Presently, there are very limited options for a broad-band long-wavelength near-infrared phosphor-converted light-emitting diode (LWNIR pc-LED) with wavelengths above ∼1500 nm, and most LWNIR phosphors have low luminescence quantum efficiency. Here, Ni2+-doped MgIn2O4 antispinel were prepared by high-temperature solid-state reaction method. Under 365 nm excitation, they exhibited emission in the range of 1200–2100 an peak ∼1490 full width at half-maximum ∼313 indicating weak crystal field environment high electron polarization around center [MgO6] octahedron. The IQE EQE MgIn2O4:Ni2+ ∼47.93% ∼34.66%, respectively. optimized phosphor was encapsulated LED chip to obtain pc-LED device night vision lighting, nonvisual detection, biological imaging. Our results confirmed that lighting based imaging technology showed clear safety advantages over traditional high-energy ray

Язык: Английский

Процитировано

15
The synthesis and application of Ni2+-doped NIR-II Phosphors composed of MgAl2-xGaxO4 solid-solution DOI
Yu Deng, Fengmei Zhu, Yuan Gao

и другие.

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1005, С. 175914 - 175914

Опубликована: Авг. 8, 2024

Язык: Английский

Процитировано

10
Synthesis and Photoluminescence Modulation of Cs4Cd1–xMnxBi2Cl12-Based Two-Dimensional Layered Double Perovskites DOI
Chunli Zhao, Yuan Gao, Jianbei Qiu

и другие.

Inorganic Chemistry, Год журнала: 2023, Номер 62(42), С. 17382 - 17389

Опубликована: Окт. 10, 2023

Two-dimensional (2D) layered double perovskites have attracted much attention because of their excellent photoelectric properties. However, few reports been published on the synthesis 2D from halide as precursors. Here, we report that CsCdCl3 and Cs3Bi2Cl9 were synthesized by coprecipitation method, a two-dimensional perovskite Cs4CdBi2Cl12 was readily mixing two perovskites. We doped different amounts Mn2+ into to form CsCd1–xMnxCl3, which introduced impurity states energy level exhibited an orange-red light emission is characteristic Mn2+. A series Cs4Cd1–xMnxBi2Cl12 CsCd1–xMnxCl3 Cs3Bi2Cl9, showed bright orange-yellow luminescence under ultraviolet excitation. The presence high concentrations Cd2+ in weakened strong Mn–Mn coupling suppressed transfer defects, thus minimizing nonradiative decay promoting efficient transfer. Our work provides new concept for low-dimensional metal with unique optical

Язык: Английский

Процитировано

19
Long-wavelength near-infrared light emitting Ni2+-doped double perovskite molybdate-based solid-solution phosphors DOI
Fengmei Zhu,

Yuan Gao,

Jianbei Qiu

и другие.

Journal of Materials Chemistry A, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

We developed Ni 2+ -doped (Sr/Ba) 2 MgMoO 6 double perovskite molybdate-based solid-solution long wavelength near-infrared luminescence (1000–2000 nm) phosphors, which shiftss in the range of 1400–1610 nm by simple adjustment Sr/Ba ratio.

Язык: Английский

Процитировано

9
Cr3+-Doped LiAlO2 NIR-I Emitting Phosphors with Superior Resistance to Thermal Quenching for Night Vision Monitoring and Bioimaging DOI
Fengmei Zhu,

Yuan Gao,

J. F. Qiu

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(44), С. 60599 - 60607

Опубликована: Окт. 22, 2024

Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) as a new NIR light source has outstanding application potential in the fields of spectroscopy analysis, sensing, imaging, and pattern recognition. Therefore, development phosphors with good luminescence thermal stability attracted much attention. To this end, we developed LiAlO2:Cr3+ garnet-type by high-temperature solid-state reaction method. Under 405 nm excitation, Cr3+ ions located tetrahedrons LiAlO2 emit emission broadband that covers 650-900 mixed several sharp narrowband R-line emissions, which showed excellent integrated intensity measured at 573 K is ∼90.86% 303 caused structural rigidity low expansion coefficient matrix material. An pc-LED device assembled optimized commercially available purple LED chip emitted output power ∼98.172 mW driving current 300 mA demonstrated an electro-optical conversion efficiency ∼9.09%, while it night vision monitoring biomedical imaging.

Язык: Английский

Процитировано

8