OPTICAL MATERIALS
·
2026
·
IF 4.3
Siyu Qin,Yanzhao Liu,Zhanghan Qin,Yi Zhu,Yulong Zhao,Meirong Sui,Feng Tong,Xiuquan Gu
All-inorganic red-emitting CsPbI 3 perovskite quantum dots (PQDs) suffer from cubic-phase instability and iodide ion migration, causing phase separation and emission quenching. This work demonstrates that lattice-level Br/I homogenization is essential for stable red emission, rather than physical blending or surface doping. Through systematic compositional screening of CsPb(Br/I) 3 solid solutions, CsPbBr 1 I 2 is identified as the optimal composition, delivering pure emission at 640 nm. Br incorporation strengthens Pb–Br bonds, passivates halide vacancies, and synergistically suppresses phase transitions and ion migration. As a result, CsPbBr 1 I 2 PQDs exhibit an ultralong fluorescence lifetime of 288 ns and retain over 70% of initial photoluminescence (PL) intensity under combined heat, water immersion, and light stresses, whereas control samples retain only 30−40%. A prototype white light-emitting diode (WLED) backlight display fabricated with these PQDs achieves a color gamut covering 127.07% NTSC and 94.88% Rec.2020, delivering vivid, saturated colors. This work provides a reliable compositional regulation strategy and theoretical foundation for perovskite-based wide-color-gamut displays.
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 23
·14586-14592
·
IF 4.036
Qin Li,Xueqing Jin,Meiying Yang,Qi Shen,Chunyan Sun
Debromination is a primary and critical procedure in the treatment of polybrominated diphenyl ethers (PBDEs) in the environment. Herein, oxygen vacancy-enriched Bi2MoO6 is firstly applied in the photoreduction debromination of PBDEs under visible light illumination. The introduction of oxygen vacancies not only promotes the red-shift of the light absorption band by Bi2MoO6, but also activates the C–Br bond through the formation of Br–O halogen bonds, thus realizing efficient visible light reduction of decabromodiphenyl ether (BDE209). The activation adsorption mode inferred by tracking analysis of the degradation process shows that the meta-position adsorption mode is the main adsorption configuration during the activation process, while the ortho-position adsorption mode is the most difficult. Thence, the oxygen vacancy-dominated photocatalytic BDE209 process is a position-selective multi-electron reduction process. The study shows that oxygen vacancy assisted C–Br activation is an excellent strategy for photocatalytic treatment of halogenated persistent organic pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Materials-Applied Research
·
2025
·Vol. 16
·期 6
·1678-1686
·
IF 0.3
Zelenina E. V.,Churkina A. V.,Snyatkov I. V.,Sychov M. M.,Bakhmetyev V. V.
ZnS:Cu, Br (0.005–0.01, 0.8 wt %) radioluminescent materials were synthesized for the first time from solid charge mixtures using a microwave sintering. The temperature range of zinc sulfide matrix recrystallization at microwave synthesis was determined in a range of 600–650°C. The microstructure and phase composition of the synthesized luminescent materials were studied; it was shown that at 650°C, a complete phase transformation of the ZnS matrix into a high-temperature wurtzite modification occurs. The spectral and brightness characteristics of tritium radioluminescence were obtained and compared with samples synthesized using a traditional solid-phase method.
研究领域:
材料科学
·
发光材料
·
微波处理
·
核能材料
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2022
·Vol. 7
·期 12
·2200370
·
IF 8.856
Junjie Wang,Danyang Li,Yu Luo,Jian Wang,Junbiao Peng
Perovskite light-emitting diodes (PeLEDs) for full-color displays based on inkjet printing technology are increasingly attractive. For potential applications, fabricating high-quality perovskite films with defined-pixel sizes is crucially important. The key issue is how to control the contact properties between the perovskite ink and a hole transport layer (HTL). In this study, a novel strategy is proposed by using the poly[(9,9-bis(3′-((N,N-dimethyl)-N-ethylammonium)-propyl)-2,7-fluorene)- alt -2,7-(9,9-dioctylfluorene)] dibromide (PFN-Br) polar polymer to modify the HTL surface, instead of conventional O 2 plasma method. The PFN-Br can enhance the surface energy of HTLs, including PVK, Poly-TPD, TFB, etc., and improve the wettability of perovskite inks on the HTL due to its polar quaternary ammonium groups. Besides, the PFN-Br acts as the easier nucleation to induce a tiny crystallization of perovskites. On the other hand, the diphenyl phosphate liver (DPA) is first used to mix in perovskite inks to optimize the perovskite film phase distribution and the elimination of uncoordinated Pb 2+ , resulting from interactions between PEA + and DPA, Pb 2+ and DPA, respectively. As a result, a defined-pixel matrix green quasi-2D PeLED with the peak external quantum efficiency over 10% via inkjet printing technique is achieved, which is the most efficient matrix green PeLEDs fabricated by inkjet printing technique so far.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Mengfeifei Jin,Xiaojuan Liang,Huiling Zhang,Jianming Liu,Guangzhan Shao,Weidong Xiang,Yinglin Song
As laser technology advances, the importance of laser protection puts an urgent demand for robust and high-efficient optical limiting materials. In this work, CsPbX 3 (X = Cl/Br, Br) NCs were synthesized by precisely controlling the ratio of Cl − to Br − and the heat treatment temperature, and the third-order nonlinear (TONL) optical properties of them were investigated systematically and deeply based on a nonlinear optical imaging technique with the phase-object (NIT-PO) at 532 nm for the first time. All of them demonstrate strong reverse saturation absorption (∼10 -12 –10 -11 m/W), and the sign of TONL refraction index (γ) relates to the component (CsPb(Cl/Br) 3 NCs glasses: ∼10 -20 m 2 /W, CsPbBr 3 NCs glasses: ∼−10 -20 to 10 -19 m 2 /W). In addition, they have excellent characteristics of thermal stability and water stability, as well as photostability under 455 nm laser irradiation, indicating that it is a promising optical limiting material.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Chun Sun,Yelin Ding,Yiwei Zhao,Zhihui Deng,Kai Lian,Zhengtong Wang,Jiazhi Cui,Ruifeng Wang,Jiabao Bai
BiOBr has garnered significant attention for photocatalysis owing to its distinctive layered structure. Nevertheless, it is full of challenges to synthesize high-quality BiOBr nanosheets by a simple room-temperature strategy due to the rapid chemical reaction between (Bi 2 O 2 ) 2+ cations and Br - anions. Herein, a Cs 3 Bi 2 Br 9 conversion strategy is proposed to fabricate BiOBr nanosheets with highly exposed (001) facets. BiOBr nanoclusters can grow on the surface of Cs 3 Bi 2 Br 9 during the hydrolysis process, which can prevent further corrosion of Cs 3 Bi 2 Br 9 , resulting in a sluggish BiOBr formation rate. During the conversion process, atom rearrangement occurs, leading to the creation of abundant oxygen vacancies. Furthermore, through precise adjustment of the amount of Cs, we can finely modulate the width and thickness of BiOBr nanosheets. As a result, the optimal sample achieves complete photodegradation of rhodamine B under 12.5 min of light irradiation. Utilizing this facile and convenient preparation method, an ohmic heterojunction comprising MXene and BiOBr has been synthesized, effectively promoting the separation of photogenerated carriers. Excitingly, the fabricated BiOBr/MXene exhibits higher photocatalytic efficiency than the single BiOBr, which can degrade rhodamine B within 7.5 min.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Carbohydrate Polymer Technologies and Applications
·
2024
·
IF 6.2
Zhiqiang Pang,Ning Li,Cuihua Dong,Hairui Ji,Yang Liao,Guihua Yang,Xuejun Pan
Lithium bromide molten salt hydrate (∼62 wt% aqueous solution of LiBr) can dissolve cellulose, but the cellulose dissolution mechanisms are not fully understood. This study revisited cellulose dissolution in the LiBr solution and aimed to provide new insights into the dissolution mechanisms. The collected evidence suggested that cellulose dissolution in the LiBr solution is primarily attributed to the disruption of intermolecular H-bonds of cellulose by the ion-dipole coordination between hydrated Li + and cellulose hydroxy. The coordination between Li + and cellulose was verified by 7 Li NMR and simultaneous DSC-TGA analysis. The observations in this study also suggest that polarizable, large-size, and low-electronegativity Br – plays a synergetic and supplementary role in the dissolution of cellulose. In addition, the dissolution of cellulose in the LiBr solution is greatly dependent on dissolution conditions (LiBr concentration, temperature, pH, and cellulose loading) and cellulose properties (particle size and degree of polymerization).
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jinghao Hua,Changchang Ma,Dayu Wu,Haitao Huang,Xiaojun Dai,Kaidi Wu,Haihong Wang,Zhaowei Bian,Sheng Feng
In this study, a novel Z-scheme Bi 19 S 27 Br 3 /CoAl-LDH heterojunction was prepared. An interface charge transfer channel was established between Bi 19 S 27 Br 3 and CoAl-LDH, accelerating the transition efficiency of interface electrons from CoAl-LDH to Bi 19 S 27 Br 3 . Thereby ensuring more excited electrons to participate in CO 2 photoreduction reactions. The reduction products were tested under artificial light conditions, and triethanolamine was selected as a sacrificial agent. After 5 h of illumination, the CO yield of Bi 19 S 27 Br 3 /CoAl-LDH Z-scheme heterojunction was 86.41 μmol·g −1 is 4 times and 7 times higher than Bi 19 S 27 Br 3 and CoAl-LDH, respectively. The yield of CH 4 in Bi 19 S 27 Br 3 /CoAl-LDH is 3.97 μmol·g −1 is 4 times higher than CoAl-LDH. Also Bi 19 S 27 Br 3 itself does not produce CH 4 . The results indicate that the Z-scheme heterojunction effectively enhances the photoreduction ability of CO 2 , providing a new approach for accurately controlling the direction of photo generated charge separation to prepare high-performance photocatalysts.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2022
·Vol. 6
·期 12
·2200862
·
IF 9.173
Kai Wang,Bo Yu,Changqing Lin,Ruohe Yao,Zuorong Nie,Hong Wang,Huangzhong Yu
The rapid development of perovskite solar cells (PSCs) perovskite is inseparable from the investigation of plentiful new additive materials. Herein, a conjugated organic material called TPD-Br containing two carbonyl groups and Br atoms is synthesized. TPD-Br with Lewis-base groups can provide excellent passivation for defects between perovskite layer and electron transport layer. Furthermore, Br atom can also interact with iodine ions via halogen bonds. TPD-Br passivates the perovskite defects because it can interact with undercoordinated Pb 2+ ions by forming Pb O bond, lower defect density and larger grain size occur in the perovskite can be obtained. Consequently, high-quality perovskite films with fewer defects can be fabricated. The PSCs with TPD-Br additive achieve a champion power conversion efficiency of 20.74%. These results illustrate that TPD-Br, as a superior passivate defect additive, can improve the performance and stability of PSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hao Xiong,Hanyou Zhang,Baisheng Sa,Ping Li,Lingyan Lin,Aijun Yang,Jiansheng Li,Jinquan Hong,Linqin Jiang,Yu Qiu
All-inorganic halide perovskite nanocrystals (PNCs) have attracted extensive attention due to their potential for the next-generation displays. The ammonium and halide composition affect strongly the photoelectrical properties and the long-term stability of PNCs. In this work, we present a novel class of mixed all-inorganic (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NCs prepared via cation/anion co-exchange reaction between CsPbBr 3 NCs and the mechanochemically reacted NH 4 Pb n X 2n+1 (X = Cl, Br, I, n = 1 or 2) powders. The cubic morphologies of (Cs,NH 4 )Pb(Br,X) 3 NCs with different halogen element combinations were successfully obtained. In the meanwhile, the extended emission ranges from deep-blue (453 nm) to warm-yellow (564 nm). Higher PLQY and higher stability against ambient air and UV light were achieved simultaneously by controlling the ion co-exchanging process. The photoluminescence quantum yield (PLQY) of (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NCs were also significantly enhanced compared with that of pure CsPbBr 3 after ions exchanging (>85% versus 58%). In addition, the stability of (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NC thin films under the UV-irradiation and in the ambient atmosphere were also dramatically improved. The cation/anion co-exchanging synthetic strategy developed in our research provides a new pathway to modulate and realize mixed-ion PNCs with high optoelectronic performance.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 43
·6091-6095
·
IF 3.1
Jing Huang,Minghao Li,Zhanhui Liu,Jingyan Hua,Hui Zeng,Yunyun Chen,Jing Su
In this work, copper-based halides Cs2CuCl4, Cs2CuBr4 and mixed-halides Cs2CuCl2.8Br1.2, Cs2CuCl2Br2 and Cs2CuCl1.2Br2.8 single crystals were grown via the evaporation method using deionized water as a solvent. The structure and actual element component of the Cs2Cu(Cl, Br)4 crystals were studied using XRD and EDS. The halides of Cs2Cu(Cl, Br)4 exhibit both good light absorption and PL performance. The absorption peaks related to LMCT electron transition bands were observed, and the tunable band gap was obtained by adjusting the Br−/Cl− ratio. PL spectra show purple, blue, and green luminescence, and the luminescence mechanism was analyzed. Our study indicates that the Cs2Cu(Cl, Br)4 halides have application prospects in optoelectronic devices.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2013
·
IF 10.677
Peng Yu,Li-Ming Wu,Liu-Jiang Zhou,Ling Chen
Deep-ultraviolet nonlinear optical (deep-UV NLO) crystals are of worldwide interest for the generation of coherent light with wavelength below 200 nm by the direct second-harmonic generation (SHG) output from solid-state lasers. The unprecedented deep-UV NLO phosphates representing their own structure types, Ba3P3O10Cl (BPOC), Ba3P3O10Br (BPOB), have been discovered, which display moderate powder SHG intensities in type I phase matchable behaviors with a short UV cutoff edge of 180 nm (measured by a single crystal, one of the shortest values among phosphates to date). Insightfully, the geometry and polarization of the C1-P3O105– building unit are affected by the crystal packing. DFT calculations and cutoff energy dependent SHG coefficient analyses reveal that the SHG origin is from the cooperation of asymmetric C1-P3O105– anion, Ba2+ cation, and Cl–/Br– anion.
研究领域:
材料科学
·
光学材料
·
非线性光学
·
固态化学
·
晶体设计
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）