A-Site Ion Doping in Cs2AgBiBr6 Double Perovskite Films for Improved Optical and Photodetector Performance DOI Creative Commons

Yuejia Wu,

Yancheng Meng, Qian Hu

et al.

Crystals, Journal Year: 2024, Volume and Issue: 14(12), P. 1068 - 1068

Published: Dec. 12, 2024

Perovskite materials, as emerging semiconductors, have attracted significant attention for their exceptional optoelectronic properties, tunable bandgaps, ease of fabrication, and cost-effectiveness, making them promising candidates next-generation devices. The all-inorganic perovskite Cs2AgBiBr6 distinguishes itself from other materials due to its remarkable optical absorption emission excellent stability, prolonged carrier recombination lifetime, nontoxic characteristics. However, a deeper understanding unique luminescent properties further optimization structure performance are still necessary. This study systematically investigates the double films through A-site Na+ doping. At an optimal doping concentration 3.5% (Na0.07Cs1.93AgBiBr6), film shows 1.4 times 2.7 enhancement in light photoluminescence intensity, compared undoped film. Low-temperature spectroscopy measurements indicate that Na0.07Cs1.93AgBiBr6 exhibits higher exciton binding energy phonon energy. Based on Na0.07Cs1.93AgBiBr6, photodetectors demonstrate improvements, with high photocurrent response 10−2 A, photo-to-dark current ratio (PDCR) 7.57 × 104, responsivity (R) 16.23 A/W, detectivity (D*) 2.92 1012 Jones, linear dynamic range (LDR) 98.75 dB, fast time 943 ms. work provides strategy optimizing offers guidance enhancing high-performance photodetectors.

Language: Английский

Bi-Based Metal Halide Perovskites and Their Photocatalytic Properties: A Review DOI
Yan Jie Li,

B. Mu,

Hong Bin Li

et al.

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Language: Английский

Citations

1
Co and N para-doping modulates the electronic structure of CdIn2S4 to enhance CO2 adsorption, activation and photocatalytic reduction DOI
Yi Liu, Yujia Liu,

Zuofang Yao

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: 371, P. 125275 - 125275

Published: March 18, 2025

Language: Английский

Citations

1
Construction of S‐Scheme Cs2AgBiBr6/BiVO4 Heterojunctions with Fast Charge Transfer Kinetics Toward Promoted Photocatalytic Conversion of CO2 DOI Open Access
Wenxuan Huang, Qiliang Zhu, Zongyin Li

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

Lead-based halide perovskites (LHPs) have been widely explored by researchers in the field of photocatalysis. However, poor stability and toxicity LHPs limit their large-scale applications. Here, lead-free Cs2AgBiBr6/BiVO4 (CABB/BVO)-X% (X = 30, 50, 100) S-scheme heterojunction composites are prepared electrostatic assembly, catalytic activity for photoreduction CO2 is evaluated. After 3 h simulated solar irradiation, CABB/BVO-50% show highest CO yield electron consumption rate 143.59 352.22 µmol g-1, which 9.2 7.8 times higher than that CABB alone, respectively. In addition, photocatalysts exhibit 81.5% high selectivity CO. The generation an internal electric (IEF) between two materials heterojunctions powerfully confirmed employing various characterization techniques DFT calculations. low carrier recombination rate, bandgap-matched heterointerfaces, exceptional charge transfer mechanism primarily responsible outstanding performance. This work provides new insights into design efficient perovskites-based photocatalytic materials.

Language: Английский

Citations

0
Effect of Trivalent Metal Cations in Layered Double Perovskites on Highly Selective CO2 Photoreduction to CO DOI
Wei Chen, Yanyi Huang, Daofu Wu

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Trivalent metal cation engineering in vacancy-ordered layered double perovskites (LDP) is a useful strategy to tune photocatalytic activity. However, the regulatory mechanism of composition on performance still lacks in-depth understanding. This study explores LDP with formula Cs4CdX2Cl12 (X = Bi, Sb) for CO2 reduction. The catalytic fine-tuned by regulating M(III)-site ions. yields CO and CH4 from Cs4CdSb2Cl12 MCs were measured at 23.81 2.68 μmol g-1, resulting selectivity 89.9%. Cs4CdBi2Cl12 demonstrated higher yields, produced 90.77 2.53 achieving 97.2%. In addition, situ diffuse reflectance infrared Fourier transform spectra reveal that modulation ions M(III)-position can enhance activity MCs. Density functional theory (DFT) analysis suggests Bi displays lower energy barrier than Sb rate-determining step, thus facilitating effective reduction CO. These findings highlight influence selection structural properties performance.

Language: Английский

Citations

0
Direct Partial Transformation of 2D Antimony Oxybromide to Halide Perovskite Heterostructure for Efficient CO2 Photoreduction DOI Open Access

Su‐Xian Yuan,

Ke Su,

Meng‐Ran Zhang

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

The photocatalytic activity of lead-free perovskite heterostructures currently suffers from low efficiency due to the lack active sites and inadequate photogenerated carrier separation, latter which is hindered by slow charge transfer at heterostructure interfaces. Herein, a facile strategy reported for construction halide-perovskite-based with swift interfacial transfer, achieved through direct partial conversion 2D antimony oxybromide Sb4O5Br2 generate Cs3Sb2Br9/Sb4O5Br2 heterostructure. Compared traditional electrostatic self-assembly method, this approach endows tightly interconnected interface in situ conversion, significantly accelerating thereby enhancing separation carriers. cobalt-doped demonstrates record-high electron consumption rate 840 µmol g-1 h-1 CO2 reduction CO coupled H2O oxidation O2, over 74- 16-fold higher than that individual Cs3Sb2Br9, respectively. This work provides an effective promoting photocatalysts improve performance artificial photosynthesis.

Language: Английский

Citations

0
Artificial Photothermal Synthesis of Hydrocarbons from CO2 and H2O DOI

Zhongkai Xie,

Wenjin Cheng, Hongyun Luo

et al.

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Abstract The excessive release of CO 2 from fossil fuel combustion has disrupted the carbon cycle, leading to elevated greenhouse gas levels. Converting into value‐added chemicals like CH 4 and C H not only offers a sustainable alternative fuels but also helps mitigate emissions. However, producing high‐energy hydrocarbons involves complex electron proton coupling, presenting significant kinetic challenges. Photothermal catalysis, which harnesses solar energy in light heat, emerges as promising method for efficient conversion hydrocarbons. This process reduces thermodynamic barriers protonation by enabling rapid transfer through thermal assistance. development photothermal catalysts capable absorbing light, generating electron–hole pairs, facilitating redox reactions is crucial enhancing efficiency selectivity. review highlights importance catalyst design, reaction conditions, reactor configuration, addresses lack comprehensive reviews on synergistic approach catalysis. By focusing precise design photogenerated heat mechanisms, this aims advance field, emphasizing its potential promote carbon‐neutral future.

Language: Английский

Citations

0
Atomic Size Misfit for Electrocatalytic Small Molecule Activation DOI Creative Commons

Ping Hong,

Changfan Xu,

Huaping Zhao

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 26, 2025

Abstract The efficient activation of small molecules such as H 2 O, CO , and N for sustainable fuel chemical production is a critical challenge in catalysis, owing to the strong covalent bonds (O─H, C═O, N≡N) that resist easy cleavage. Catalysts are pivotal overcoming these energy barriers, enhancing reaction rates selectivity. strategy atomic size misfit, which introduces structural defects like vacancies, grain boundaries, dislocations, has gained attention promising approach optimize catalytic activity. This modulates interactions, alters electronic structures, enhances reactivity active sites, facilitating molecules. Moreover, this holds significant potential reducing environmental impact by enabling more processes. However, current research on misfit remains fragmented, lacking unified framework. A comprehensive review essential consolidate its mechanisms, applications, integration with other tuning methods alloying doping. aims provide valuable insights into design next‐generation catalysts, guiding future developments conversion technologies offering pathways practical, scalable applications molecule activation.

Language: Английский

Citations

0
Recent Advances in Metal Halide Perovskites for CO2 Photocatalytic Reduction: An Overview and Future Prospects DOI

Jinpeng Lv,

Rui‐tang Guo,

Hao‐wen Zhu

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 30, 2024

Abstract The photocatalytic reduction of CO 2 into valuable chemicals and fuels has become a significant research focus in recent years due to its environmental sustainability energy efficiency. Metal halide perovskites (MHPs), renowned for their remarkable optoelectronic properties tunable structures, are regarded as promising photocatalysts. Yet, practical uses constrained by inherent instability, severe electron–hole recombination, scarcity active sites, prompting substantial efforts optimize MHP‐based This review summarizes the latest advancements photocatalysis. First fundamental principles photocatalysis outlined structural optical characteristics MHPs evaluated. Then key strategies enhancing MHP photocatalysts, including morphology surface modification, encapsulation, metal cation doping, heterojunction engineering, molecular immobilization highlighted. Finally, considering progress needs industrial application, challenges future prospects explored. aims support researchers development more efficient stable

Language: Английский

Citations

1
A-Site Ion Doping in Cs2AgBiBr6 Double Perovskite Films for Improved Optical and Photodetector Performance DOI Creative Commons

Yuejia Wu,

Yancheng Meng, Qian Hu

et al.

Crystals, Journal Year: 2024, Volume and Issue: 14(12), P. 1068 - 1068

Published: Dec. 12, 2024

Perovskite materials, as emerging semiconductors, have attracted significant attention for their exceptional optoelectronic properties, tunable bandgaps, ease of fabrication, and cost-effectiveness, making them promising candidates next-generation devices. The all-inorganic perovskite Cs2AgBiBr6 distinguishes itself from other materials due to its remarkable optical absorption emission excellent stability, prolonged carrier recombination lifetime, nontoxic characteristics. However, a deeper understanding unique luminescent properties further optimization structure performance are still necessary. This study systematically investigates the double films through A-site Na+ doping. At an optimal doping concentration 3.5% (Na0.07Cs1.93AgBiBr6), film shows 1.4 times 2.7 enhancement in light photoluminescence intensity, compared undoped film. Low-temperature spectroscopy measurements indicate that Na0.07Cs1.93AgBiBr6 exhibits higher exciton binding energy phonon energy. Based on Na0.07Cs1.93AgBiBr6, photodetectors demonstrate improvements, with high photocurrent response 10−2 A, photo-to-dark current ratio (PDCR) 7.57 × 104, responsivity (R) 16.23 A/W, detectivity (D*) 2.92 1012 Jones, linear dynamic range (LDR) 98.75 dB, fast time 943 ms. work provides strategy optimizing offers guidance enhancing high-performance photodetectors.

Language: Английский

Citations

1