ORGANIC ELECTRONICS
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2019
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IF 3.495
Zhongyuan Guan,Fei Chen,Zhenyang Liu,Peiwen Lv,Mingjun Chen,Mingxuan Guo,Xu Li,Feng Teng,Song Chen,Aiwei Tang
For quantum-dot light-emitting diodes (QD-LED), replacing Cd-based II-VI nanocrystals (NCs) with the Cu-In-Zn-VI counterparts combines the consideration of environmental benignity and device performance. To prove this concept, the chemical composition and nanostructures of Cu-In-Zn-VI nanocrystals need to be thoroughly explored aiming to competitive optoelectronic properties. Herein, we reported a detailed study of Cu–In–Zn–Se–S synthesis and demonstrated how the optical bandgap, emission full width at half-maximum (FWHM) and the performance of QD-LED were tuned by simply changing the dose of precursors in a non-injection synthesis. Evident by optical absorption , the optimization of Se and Cu doses enabled good dispersity and desired emission wavelength . Further analysis of photo-electron spectroscopy revealed the chemical composition from core to surface favored soft confinement of exciton by gradually increasing the loading of Zn element. Finally, we successfully demonstrated solution-processed QD-LEDs with the best external quantum efficiencies as high as 4.2% and emission wavelength centering at 663 nm. To our best knowledge, this is the most efficient solution-processed red QD-LED based on Cu-In-Zn-VI nanocrystals.
研究领域:
材料科学
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光电工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
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2022
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IF 5.545
Zang Shuaipu,Zhang Xuhui,Sun Yingying,Li Ning,Wang Lei,Li Lin Song
Harnessing environment-friendly and low-cost multinary Cu-In-Zn-S quantum dots (QDs) as emitters for light-emitting diodes (LEDs) has attracted great attention for display and lighting application. However, suboptimal QD structure is a huge obstacle, which results in serious non-radiative recombination and efficiency roll-off. Herein, we synthesized structure-tailored Cu-In-Zn-S/ZnS//ZnS QDs by improving the reactivity of shell growth by 2-ethylhexanoic acid (EHA) ligands. The EHA-assisted shell growth can boost an extended alloyed layer at the core-shell interface and a smoothed confinement barrier, which effectively passivate the interface defects and suppress Förster resonance energy transfer (FRET) process. These synthesized QDs display a bright photoluminescence emission (quantum yield of 83%) and a larger size of 8.4 nm. Moreover, the resulting LEDs based on the EHA-assisted QDs exhibit a maximum luminance of 8074 cd/m2, and a current efficiency of 7.3 cd/A with a low efficiency roll-off. Our results highlight a remarkable ligand strategy to tailor the QD structure for high performance QD-based LEDs.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Jiaojiao Cao,Yubo Lian,Huatao Weng,Zhenyu Chen
The effect of an external DC electric field on the inhibition behavior of Zn-MOFs in 0.5 mol/L NaCl solution for copper was investigated via electrochemical measurements and various characterization techniques. Results indicated that the corrosion inhibition efficiency of the Zn-MOFs decreased under strong electric field intensities, which went from 94.2% to 61.7%. The corrosion inhibition efficiency of the materials decreased with increasing electric field duration when maintained at a certain electric field intensity. When the electric field duration time was 6 h, 12 h, 18 h and 24 h, the corresponding efficiency was 90.4%, 86.8%, 78.2% and 61.7% respectively. The effect of an electric field on the corrosion inhibition performance of the Zn-MOFs could essentially be attributed to changes in the structure of the material framework.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
ACS Catalysis
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2026
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IF 13.6
Xinhao Bai,Peng Wu,Jianjun Chen,Chang Wang,Jinxing Mi,Xiaoping Chen,Feifan Huang,Junhua Li
The challenge of tackling atmospheric pollutants and the demand for low-carbon environmental technologies have imposed urgent requirements on the control of CO and NOx pollutants. Synergistic catalytic treatment is regarded as the most ideal emission reduction technique, with the difficulty lying in simultaneously enhancing catalytic activity and resolving competitive adsorption. In this work, the Cu component was incorporated into the CeTiO2 catalyst. The optimized Cu2/CeTiO2 catalyst achieved over 90% conversion for both CO and NOx across a broad temperature range of 225–325 °C. Characterization and theoretical calculations demonstrated that Cu doping decreased the valence state of Ce and Ti sites, thereby enhancing lattice oxygen activation and migration ability. The increased CO adsorption also contributed to the elevated CO oxidation activity. The broadening of the simultaneous removal temperature range was achieved by eliminating competitive adsorption of reactants. Specifically, the competitive adsorption between NH3 and CO was mitigated after Cu doping. NO was primarily adsorbed at the Ce and Ti sites, while Cu was engineered as the CO capture site. This substantially reduced the competitive adsorption between the two reaction atmospheres, enabling simultaneous removal of both pollutants. This research offers a reliable approach and catalyst construction strategy for the simultaneous removal of CO and NOx, thereby advancing the development of pollution reduction and carbon mitigation technologies.
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产品关联
DOI
高影响因子
Solar RRL
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2025
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IF 4.7
Yongliang Lai,Bowen Liu,Dongdong Shen,Zhuoer Deng,Xinan Shi,Daocheng Pan
Indium tin oxide (ITO) is usually served as the transparent conductive electrode of Cu(In, Ga)(S, -Se) 2 (CIGSSe) solar cells. However, ITO is fabricated by sputtering method, which will increase the cost of CIGSSe solar cells and prevent its large-scale market applications in the future. Hence, it is particularly important to develop low-cost transparent conductive window layers to replace the traditional ITO. Silver nanowires (AgNWs) are considered to be the most promising alternative to ITO. Compared with sputtered ITO, AgNWs have the advantages of high transmittance, low cost, and easy fabrication. Nevertheless, the poor adhesion and stability of AgNWs can prevent the transportation of carriers of CIGSSe solar cells. Here, we select amorphous TiO x as an adjuvant to fabricate AgNWs/TiO x composite transparent conductive layer to substitute the traditional ITO. Under the assistance of TiO x matrix, not only the connection, adhesion, and stability of AgNWs are greatly enhanced, but also the surface roughness of AgNWs is also reduced. The influence of AgNWs concentration on the performance of CIGSSe solar cells is investigated. When the AgNWs concentration is 2.5 mg/mL, the transmittance and sheet resistance of AgNWs thin film are 93.35% and 93 Ω/sq, respectively, and the devices achieved the highest efficiency of 13.59%.
研究领域:
材料科学
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能源技术
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
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2012
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IF 7.286
Gang Wang,Shuyang Wang,Yong Cui,Daocheng Pan
A novel and versatile metal–organic molecular precursor-based solution approach and the fabrication of high efficiency Cu(In,Ga)(S,Se)2 solar cells are presented. Many types of metal oxides, hydroxides, and acetylacetonates (acac), such as Cu2O, ZnO, SnO, Sb2O3, MnO, PbO, In(OH)3, Cd(OH)2, Ga(acac)3, and so forth, can be easily dissolved in butyldithiocarbamic acid, forming thermally degradable metal–organic molecular precursor solutions. By developing a simple and green ethanol solution-processed route and tuning the chemical composition of the Cu(In,Ga)(S,Se)2 thin film, as-fabricated solar cells exhibit an average power conversion efficiency up to 8.8%.
研究领域:
材料科学
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）