Nature Communications
·
2019
·Vol. 10
·期 1
·1-7
·
IF 11.878
Chen Chao,Gao Liang,Gao Wanru,Ge Cong,Du Xinyuan,Li Zha,Yang Ying,Niu Guangda,Tang Jiang
Circularly polarized light (CPL) detection is required in various fields such as drug screening, security surveillance and quantum optics. Conventionally, CPL photodetector needs the installation of optical elements, imposing difficulties for integrated and flexible devices. The established CPL detectors without optical elements rely on chiral organic semiconductor and metal metamaterials, but they suffer from extremely low responsivity. Organic-inorganic hybrid materials combine CPL-sensitive absorption induced by chiral organics and efficient charge transport of inorganic frameworks, providing an option for direct CPL detection. Here we report the CPL detector using chiral organic-inorganic hybrid perovskites, and obtain a device with responsivity of 797 mA W -1 , detectivity of 7.1 × 10 11 Jones, 3-dB frequency of 150 Hz and one-month stability, a competitive combined feature for circularly polarized light detection. Thanks to the solution processing, we further demonstrate flexible devices on polyethylene terephthalate substrate with comparable performance.
研究领域:
光电技术
·
材料科学
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Lin Fan,Ce Li,Tao Peng,Miao Yan,Xiaoqing Pei,Yifan Liu,Weiling Yang,Shasha Li,Hai Lin,Chun Li,Lina Liu,Xuechao Yu,Fanming Zeng
Phosphor-converted white light-emitting diodes (w-LEDs) have become indispensable for modern lighting and display technologies. However, the development of efficient and thermally robust white phosphors remains a persistent challenge. Here, we report a series of Sr 3 Y 2 Ge 3 O 12 : Dy 3+ garnet-based phosphors that exhibit dual emissions at 480 and 580 nm, enabling cool-white light generation. Co-doping with La 3+ effectively lowers the crystal symmetry and narrows the band gap from 4.67 to 4.56 eV, which enhances the radiative transitions of Dy 3+ . As a result, the emission intensities at 480 and 580 nm bands are boosted by factors of 2.21 and 1.91, respectively. The spectral modification drives a chromaticity shift from cool to warm white light, with correlated color temperature decreasing from 4703 K to 2927 K. Moreover, the modified phosphors exhibit excellent thermal stability (92.51 % at 150 °C) while maintaining high internal quantum efficiency (29.43 %). When integrated with 365 nm excitation chips, the phosphors enable the fabrication of w-LEDs with tunable color temperatures. These findings offer a promising pathway for the design of next-generation high-performance warm w-LEDs.
研究领域:
材料科学
·
发光材料
·
半导体照明
·
固态物理
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2025
·
IF 4.6
Deyu Li,Mingming Zhang,Yutong Zhang,Yi Han,Lei Wang,Xinfeng Liu,Jun Xing
Recently, two-dimensional (2D) halide perovskites achieved impressive performance as broadband white-light emitters, which originate from exciton self-trapping in the distorted lattice. So far, it is still a challenge to modulate the exciton self-trapping process as well as tune the white light-emitting properties of 2D perovskites. Here we develop molecular alloying engineering to modulate the exciton self-trapping rate and depth in halide perovskites. We present a series of 2D perovskite alloys by incorporating molecules A with small steric hindrance and Ai with large steric hindrance, which determine the structural distortion of the perovskite. The higher proportion of Ai induces larger structural distortion of the perovskite and leads to a higher rate of exciton self-trapping and deeper exciton self-trapping depth. The designed perovskite alloys exhibit tunable broadband emission, covering from cool- to warm-white light. Our findings achieve exciton modulation and provide a general method for tailoring the optical properties of perovskites.
研究领域:
材料科学
·
光电子学
·
固体物理学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Fei Li,Jingquan Liu,Xiaole Gong,Fan Qiao,Junhui Chen,Honglei Liu
Spiropyran (SP), a classical photochromic molecule, exhibits reversible structural isomerization under stimuli such as light irradiation, pH changes, and solvent variations. However, its practical application in solid-state materials is still hindered by challenges such as molecular aggregation and fluorescence quenching. In this work, we developed photochromic SP-grafted sodium alginate derivatives via a green and efficient synthetic strategy, which combines the stimuli-responsive properties of SP with the processability of alginate. Through sequential amidation under mild conditions, carboxylated SPs were grafted onto sodium alginate, enabling the synthesis of novel biomaterials with tunable fluorescence. The synthesized biomaterials exhibit reversible color changes under UV/visible light. Processed into films, fibers, and microspheres via ionic crosslinking with Ca 2+ , these materials showcased applications in fluorescence patterning, textile integration, and solvent detection.
研究领域:
材料科学
·
高分子化学
·
生物工程
·
光学材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Mingqing Zhang,Dongjie Zhou,Yu Zhang,Huanchen Yu,Zhengji Wen,Xiao Dai,Kun Ba,Yunxiang Di,Tong Shu,Jianlu Wang,Jiaming Hao,Meikang Han
Thin-film interference with a Fabry–Pérot cavity is a classic approach to generating structural colors for anti-counterfeiting, sensors, and aesthetical demands. However, an absorbing layer capable of balancing the reflectance and absorption bands remains elusive, thereby limiting the chromatic and luminant tunability of structural coloration. Here wide-color-gamut films are reported with MXene as the absorbing layer in a simple trilayer configuration for vivid structural colors, outperforming conventional metal- and semiconductor-based films. It is demonstrated that the ‘lossy’ refractive indices of different metallic MXene compositions broaden the absorption bandwidth of multilayer films and maintain the high reflectance, enabling a substantial and complementary gamut with high tunability beyond the area of sRGB color space. Various structural color films/patterns based on MXenes showcase the compatibility for different scenarios. The results accompanied by theoretical calculations provide insights into the fundamental understanding of light-MXene interaction in coloration. The unique optical absorbance and solution processibility of the MXene family offer a versatile platform for the physical manipulation of light beyond conventional manufacturing approaches.
研究领域:
光学材料
·
纳米光子学
·
功能涂层
·
材料科学
·
表面科学
·
仿生光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Nanophotonics
·
2023
·
IF 1.5
Ziheng Wang,Xueying Chu,Jinhua Li,Dengkui Wang
Detectors with cost-effective, polarization-sensitive, and integrative functionalities are required for next-generation ultraviolet (UV) detection systems. Low-dimensional semiconductor materials have potential for optical device applications, especially polarization detection, because of their excellent polarization characteristics. Therefore, ultralong ZnO microwires, ∼0.5 to 1 cm long, were prepared using the chemical vapor-phase epitaxy method, making it easy to build photoelectric devices. The emission polarization of the ZnO microwires excited by circularly polarized light was ∼0.60, indicating a high-anisotropy optical property. Their UV-polarization spectrum and photoelectric detection were determined. When the ZnO microwire was excited by linearly polarized UV light, the intensity of photoluminescence (PL) changed periodically with the polarization direction of the UV light. The PL polarization of the ZnO microwire for linear UV detection was ∼0.12. For a ZnO microwires photoelectric device, the photocurrent anisotropy ratio reached 1.28 when the polarization angle of the incident UV light changed. These results suggest that the obtained ultralong ZnO microwires have the potential for application in future UV-polarization detection systems.
研究领域:
材料科学
·
光学工程
·
半导体器件
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2018
·Vol. 13
·期 9
·1192-1198
·
IF 3.692
Heshu Fang,Xia Zhao,Yuan Lin,Song Yang,Jun Hu
The construction of stimuli-responsive materials by using naturally occurring molecules as building blocks has received increasing attention owing to their bioavailability, biocompatibility, and biodegradability. Herein, a symmetrical azobenzene-functionalized natural glycyrrhizic acid ( trans - GAG ) was synthesized and could form stable supramolecular gels in DMSO/H 2 O and MeOH/H 2 O. Owing to trans – cis isomerization, this gel exhibited typical light-responsive behavior that led to a reversible gel–sol transition accompanied by a variation in morphology and rheology. Additionally, this trans - GAG gel displayed a distinct injectable self-healing property and outstanding biocompatibility. This work provides a simple yet rational strategy to fabricate stimuli-responsive materials from naturally occurring, eco-friendly molecules.
研究领域:
材料科学
·
生物化学
·
有机合成
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 35
·27491-27495
·
IF 3.84
Wei Tang,Ye Sun,Miao Yu,Xiao Liu,Yongqi Yin,Bin Yang,Limei Zheng,Feng Qin,Zhiguo Zhang,Wenwu Cao
Single-phase SrTiO3:mPr3+ (m = 0.01–0.1) nanoparticles have been synthesized by a hydrothermal method. Different from reported Pr3+-based phosphors which were all dominated by red emissions, considerably strong and overwhelming blue-green emission centered at 491 nm has been achieved together with minor green and red emissions. The absolute and relative intensities of these emissions can be modified by Pr3+ concentrations and annealing temperatures in a controlled manner, giving rise to varied emission colors. In particular, owing to the appropriate combination of the blue to red emissions, desirable white-light emission has been realized from the as-grown SrTiO3:0.01Pr3+ and the annealed SrTiO3:0.06Pr3+ samples at 350 °C with CIE chromaticity coordinates of (0.33, 0.35) and (0.35, 0.37) and a correlated color temperature of 5601 K and 4883 K, respectively, indicating the promising application potential of SrTiO3:Pr3+ as single-phase phosphors for white light-emitting-diodes. This work may provide a fresh route to acquire white emission from a single-composition phosphor.
研究领域:
材料科学
·
光子学
·
固态化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 39
·18496-18500
·
IF 6.97
Yunxia Wang,Jibo Tang,Shunping Zhang,Hongxing Xu,Tao Ding
Plasmon-assisted optical growth significantly improves the controllability of polymerization on the nanoscale, which greatly facilitates the fabrication of nanodevices and their integration. Traditional approaches for nanodevices strongly rely on nanofabrication techniques, which involve complicated multi-steps and expensive instrumentation. Here, we build photoelectric nanoswitches by precisely implanting photoelectric active polymers, polypyrrole, into metallic bowtie nanogaps via charge transfer induced oxidative polymerization, which show conductivity up to 4 μS m−1 with an optical switching response time of ∼50 ms. We further demonstrate their photoelectric switchability with different laser powers, wavelengths and amounts of polypyrrole in the gaps. This plasmon-assisted optical growth strategy not only provides a facile and accurate means to control the polymerization process, but also greatly expedites the fabrication of nanodevices and their integration.
研究领域:
纳米技术
·
光子学
·
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Xinlong Yan,Chen Peng,Weimin He,Weiheng Duan,Yi Lu,Kan Zhang,Yuzhen Jia,Ruichen Wang,Weihu Yang,Shiguo Liu,Hetong Han,Zhaohui Song,Fan Yang
Generally, the light output (LO) of scintillators decreases after the gamma-ray irradiation. However, the LO enhancement is observed in CsPbCl 3 crystals after gamma-rays irradiation at doses of 10 2 , 10 3 , 10 4 and 10 5 rad. A new luminescence band around 580 nm with a decay time of 12 μs is observed after the irradiation. Its intensity depends on the integrated dose of irradiation. A positive correlation between its intensity and LO is observed, illustrating the LO enhancement can be attributed to the new luminescence band. The absorption wavelength of radiation induced color centers at 2.84 eV is consistent with the excitation wavelength of the new luminescence band. There is a positive correlation between the concentration of color centers at 2.84 eV and the intensity of the new luminescence band. It indicates the new luminescence band is attributed to the luminescence of radiation induced color centers. Considering the high mobility of Cl − ions in the CsPbCl 3 crystal, it is speculated the radiation induced color centers may be vacancies of Cl − ions. The intensity of the new luminescence band decreases with time, which is attributed to the annihilation of radiation induced color centers at room temperature. The study provides valuable insights into the performance of CsPbCl 3 crystal under high irradiation. It also explains the abnormal LO enhancement in CsPbCl 3 crystals after gamma-ray irradiations, which may be useful to understand the defects of inorganic halide perovskite crystals.
研究领域:
材料科学
·
核物理
·
光学材料
·
钙钛矿半导体
·
辐射探测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 102
·期 9
·5082-5089
·
IF 3.094
Hui Mei,Weizhao Huang,Yizhi Zhao,Laifei Cheng
Ceramic is a typical brittle-essence material, which makes the low strength a fatal problem for ultra-light ceramic lattices with ultra-high porosity. In this study, ultra-light ceramic lattices with calculated density of ca. 0.8 g/cm 3 and porosity up to ca. 80% reaching maximum compressive strength of 107 MPa were successfully printed by a three-dimensional (3D) printing technology stereolithography. Ultra-high-specific strength of the printed ceramic lattices (32 N·m/g) was even much higher than that of the steel lattices (2 N·m/g) (Int J Mach Tool Manuf, 62, 2012, 32). Short-cut quartz fibers and in situ growing Si 3 N 4 whiskers were introduced as reinforcements to improve the strength of the printed lattices. Compressive strengths of the ceramic lattices improved by 2.8 and 3.6 times stronger than the originals, respectively. Significantly, energy absorption of the ceramic lattices under compression reached over 10 times larger than before. In comparison with the originals, micronano reinforcements significantly improved the compressive properties of the lattices with microsupporting structures and network formed in internal pores while maintaining the ultra-light structure.
研究领域:
材料科学
·
增材制造
·
陶瓷工程
·
材料力学性能
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2024
·
IF 6.1
Wenxue Li,Siyuan Chen,Shiwang Xie,Xianmao Lu,Zhou Li,Yujia Lv,Dan Luo
Bacteriorhodopsin is a biological material with excellent photosensitivity properties. It can directly convert optical signals into electrical signals and is widely used in various biosensors. Here, we present a bR-based wearable pH biometer that can be used to monitor wound infection. The mechanism of the pH-sensitive effect of the bR electrode is explained, which generates a transient photovoltage under light irradiation and a negative photovoltage when the lamp is turned off. Since the photoelectric signal of bR is affected by different pH values, the photovoltage is changed by adjusting the pH value. The ratio (Vn/Vp) of negative photovoltage (Vn) to positive photovoltage (Vp) has a good linear relationship (R2 = 0.9911) in the pH range of 4.0–10.0. In vitro experiments using rats as a model confirmed that this wearable pH biometer can monitor pH changes that occur in wound infection.
研究领域:
生物技术
·
生物工程
·
传感器
·
医疗器械
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）