APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Xuandong Wang,Jie He,Jieyuan Li,Gang Lu,Fan Dong,Tetsuro Majima,Mingshan Zhu
Direct conversion CO 2 to useful chemical fuels by photocatalysis has been considered to be a promising strategy for renewable energy production. The realization of this goal relies mainly on the development of photocatalysts with ideal charge separation efficiency. Here, we use all-inorganic perovskite nanocrystals (CsPbBr 3 ) immobilized on two-dimensional (2D) black phosphorus nanosheets (BP), resulting in a new and effective CsPbBr 3 /BP photocatalyst for CO 2 photoreduction. Compare to pristine CsPbBr 3 , the introduction of BP generates more active sites for facilitating CO 2 activation and trapped the excited electrons from CsPbBr 3 with high charge separation efficiency. Time-resolved photoluminescence and transient absorption measurements together with density functional theory calculations provide a clear elucidation of the charge separation pathways that contribute to the enhanced CO 2 conversion rate. This significant feature provides a new venue for constructing all-inorganic perovskite-based photocatalyst by combining with BP for solar energy conversion and artificial photosynthesis.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS
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2019
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IF 1.822
Fangying Juan,Fan Xu,Mei Wang,Mingxu Wang,Guozhi Hou,Jun Xu,Haoming Wei,Yinghua Wang,Yangqing Wu,Bingqiang Cao
Plasmonic Au nanorods/CsPbBr 3 quantum dots film has been prepared via spin-coating. It is found that photoluminescence intensity of Au nanorods/CsPbBr 3 quantum dots film exhibits 2-fold enhancement compared with pristine CsPbBr 3 quantum dots film. Time-resolved photoluminescence decay curves show that the lifetime of CsPbBr 3 quantum dots film decreases from 6.15 ns to 4.78 ns after combining with Au nanorods. The finite-difference time-domain simulation indicates that Au nanorods arouse a localized surface plasmon resonance around 500 nm, which enhances the emission intensity of CsPbBr 3 quantum dots film.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 45
·16711-16719
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IF 4.39
Ying Jiang,Cunxin Mei,Zhijie Zhang,Zhongliang Dong
Perovskite CsPbBr3 nanocrystals (NCs) have emerged as promising candidates for the photocatalytic reduction of CO2. However, the CO2 conversion efficiency of pristine CsPbBr3 is still unsatisfactory, mainly due to severe radiative recombination, poor stability and low CO2 capturing ability. Coincidentally, nanoporous carbon powder (NCP) has received tremendous attention for environmental remediation and renewable energy production. Herein, by immobilizing CsPbBr3 NCs into the pores of NCP, a CsPbBr3/NCP hybrid has been successfully constructed for the first time, which combined the advantages of CsPbBr3 NCs and NCP. In comparison with pristine CsPbBr3, the resultant hybrid photocatalyst exhibited much superior photocatalytic performance in CO2 reduction, which could be attributed to the enhanced electron extraction and transfer between CsPbBr3 NCs and NCP, higher CO2 capturing ability and more active sites for CO2 activation. Furthermore, the nanohybrid displayed remarkable reusability in photocatalytic CO2 reduction. This study is anticipated to provide a new pathway for the design and fabrication of high-performance photocatalysts based on perovskites for solar-energy-conversion applications.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Light-Science & Applications
·
2024
·Vol. 13
·期 1
·1-11
·
IF 20.6
Luo Chengzhao,Ding Yanhui,Ren Zhenwei,Wu Chenglong,Huo Yonghuan,Zhou Xin,Zheng Zhiyong,Wang Xinwen,Chen Yu
The high pixel resolution is emerging as one of the key parameters for the next-generation displays. Despite the development of various quantum dot (QD) patterning techniques, achieving ultrahigh-resolution (>10,000 pixels per inch (PPI)) and high-fidelity QD patterns is still a tough challenge that needs to be addressed urgently. Here, we propose a novel and effective approach of orthogonal electric field-induced template-assisted dielectric electrophoretic deposition to successfully achieve one of the highest pixel resolutions of 23090 (PPI) with a high fidelity of up to 99%. Meanwhile, the proposed strategy is compatible with the preparation of QD pixels based on perovskite CsPbBr 3 and conventional CdSe QDs, exhibiting a wide applicability for QD pixel fabrication. Notably, we further demonstrate the great value of our approach to achieve efficiently electroluminescent QD pixels with a peak external quantum efficiency of 16.5%. Consequently, this work provides a general approach for realizing ultrahigh-resolution and high-fidelity patterns based on various QDs and a novel method for fabricating QD-patterned devices with high performance.
研究领域:
材料科学
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纳米技术
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显示技术
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电气工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Photonics
·
2024
·Vol. 18
·期 8
·870-877
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IF 32.3
Hua Yunqiu,Zhang Guodong,Sun Xue,Zhang Peng,Hao Yingying,Xu Yadong,Yang Yujie,Lin Qianqian,Li Xiang,Zhai Zhongjun,Cui Fucai,Liu Hongjie,Liu Jiaxin,Tao Xutang
Halide perovskites have shown great potential for X-ray detection in medical imaging and product inspection applications. However, the ion migration in perovskites causes large noise and baseline drift, deteriorating the X-ray detection and imaging performance. Here we adopt the atmosphere-controlled edge-defined film-fed growth (EFG) method to grow high-quality shape-controlled CsPbBr 3 single crystals (SCs) in an Ar and HBr mixed atmosphere. Compared with the vertical Bridgman (VB)-CsPbBr 3 SCs, the EFG-CsPbBr 3 SCs show a much lower trap density, a higher resistivity (1.61 × 10 10 Ω cm) and a larger ion migration activation energy (0.378 eV), decreasing the leakage current and baseline drift. An X-ray detector based on EFG-CsPbBr 3 SCs hence exhibits outstanding balanced performance, with a negligible dark-current drift of 1.68 × 10 −9 μA cm −1 s −1 V −1 , an incredibly low detection limit of 10.81 nGy air s −1 and a sensitivity of 46,180 μC Gy air −1 cm −2 under a high electric field of 5,000 V cm −1 . Furthermore, the detector maintains a stable response for 30 days. Our work provides an effective strategy to improve lead-halide perovskite SCs for high-performance X-ray detection and imaging.
研究领域:
材料科学
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物理学
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电子工程
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医学成像
✓ 已验证
产品关联
DOI
高影响因子
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