Virtual and Physical Prototyping
·
2023
·
IF 10.6
Junyi Zhou,Houchao Zhang,Rui Wang,Zhenghao Li,Hongke Li,Peikai Duan,Shuai Shang,Youchao Zhang,Zelin Wang,Wensong Ge,Hongbo Lan,Xiaoyang Zhu
Metal mesh transparent electrodes present a promising alternative to Indium-Tin Oxide (ITO) due to their adjustable period and favourable trade-off between transmittance and conductivity. In this work, a template-free, non-high temperature hybrid additive manufacturing approach of the polyacrylonitrile (PAN)/Cu core–shell structure high-resolution metal mesh flexible transparent electrode (FTE) is proposed. The electric field-driven (EFD) 3D printing method was employed to print ultra-fine lines with widths as low as 1 μm. The composite-plating process combining electroless plating and electroplating has solved the structural defects of single deposition process. The prepared FTE has an excellent conductivity down to 1 Ω/sq and 89% light transmission (at 550 nm). Its exceptional mechanical properties and environmental stability make it suitable for diverse working environments. Even after undergoing 2000 bends at a radius of 3 mm, the resistance change rate remains as low as 1.4%. The resistance exhibits an approximately 8% change rate in the acid–base environment experiments conducted over 72 h. The flexible touch screen prepared with this FTE exhibits excellent writing performance in both flat and curved working scenarios. Furthermore, the significant potential of this FTE in the field of optoelectronics is effectively demonstrated through its exceptional luminescent performance in electroluminescent devices.
研究领域:
材料科学
·
纳米技术
·
电气工程
·
制造技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Daqin Chen,Xiao Chen,Zhongyi Wan,Gaoliang Fang
Full-color visible emissions are particularly crucial for applications in displays and lightings. In this work, we developed a facile room-temperature ligand-assisted supersaturated recrystallization synthesis of monodisperse, cubic structure Cs1–mFAmPbX3 (X = Cl, Br, and I or their mixtures Cl/Br and Br/I, 0 ≤ m ≤ 1) hybrid perovskite quantum dots (QDs). Impressively, cation substitution of Cs+ by FA+ was beneficial in finely tuning the band gap and in exciton recombination kinetics, improving the structural stability, and raising the absolute quantum yields up to 85%. With further assistance of anion replacement, full-spectral visible emissions in the wavelength range of 450–750 nm; narrow full width at half-maxima, and a wide color gamut, encompassing 130% of National Television System Committee television color standard, were achieved. Finally, Cs1–mFAmPbX3-polymer films retaining multicolor luminescence are prepared and a prototype white light-emitting diode device was constructed using green Cs0.1FA0.9PbBr3 and red Cs0.1FA0.9Br1.5I1.5 QDs as color converters, certainly suggesting their potential applications in the optoelectronics field.
研究领域:
材料科学
·
纳米技术
·
光电技术
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Yajie Zhu,Daocheng Hong,Yan Nie,Hanyu Liu,Sushu Wan,Mingcai Xie,Weiqing Yang,Zhihong Wei,Siyang Ye,Yuxi Tian
Cesium lead halide perovskite (CsPbX 3 ) nanocrystals (NCs) have exhibited promising applications in light-emitting diodes (LEDs) due to their tunable bandgap and high quantum efficiency. Backlighting LEDs based on CsPbBr 3 NCs with green emission have been widely designed to show their superiority. However, unlike CsPbBr 3 NCs, backlighting LEDs composed of mixed-halide perovskite (CsPbBr x I 3-x ) NCs have rarely been reported and should be further applied in colorful LEDs for granted, mainly because of the unexpected destructive effects from the commercial polymer matrix verified in this work. Purification of a commercial polymer matrix was promoted as an effective method to eliminate the destructive effects. Further investigation proved that the species with strong polarity and oxidability, e.g., BPO in commercial PMMA , are responsible for such destructive effects by inducing the structural transformation of CsPbBr x I 3-x NCs. We believe such results can help to gain a deeper understanding of the degradation mechanism of mixed-halide perovskite materials and indicate a promising method to develop stable colorful perovskite-based LEDs.
研究领域:
材料科学
·
光电领域
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 9
·期 3
·494-500
·
IF 6.569
Yaxin Xu,Jiarui Hu,Xingfu Xiao,Huanfeng He,Guoliang Tong,Junnian Chen,Yunbin He
Bismuth halide hybrid perovskites have aroused intense interest in optoelectronic fields. However, developing novel bismuth halide hybrid perovskites to balance the hydrophobicity and electron transport ability is still challenging. Besides, the conventional temperature-lowering crystallization method usually causes high supersaturation and facilitates the formation of impurity phase and defect structures. Herein, we reported the synthesis of bulk zero-dimensional (0D) guanidinium bismuth iodide ((Gua)3Bi2I9) single crystals via an antisolvent-assisted evaporation crystallization method at room temperature. The as-grown (Gua)3Bi2I9 single crystals have sizes of up to 5 × 5 × 0.6 mm3. Besides, they have shown to have distinct semiconductor properties, such as a direct bandgap of 2.08 eV, low density of defects and traps of 3.35 × 1010 cm−3 and obvious photoconductivity. Moreover, (Gua)3Bi2I9 exhibits a large bulk resistivity of 3.94 × 1011 Ω cm and strong X-ray attenuation coefficient, which satisfies the distinct attributes for X-ray detection. As a consequence, the assembled vertical Au/(Gua)3Bi2I9 single crystal/Au X-ray photoconductor achieves a sensitivity of 18.23 μC Gyair−1 cm−2 at a bias voltage of 500 V. This study provides a new horizon for the design and synthesis of bismuth halide perovskites toward non-toxic X-ray detectors.
研究领域:
材料科学
·
光电领域
·
医学检测
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 5
·期 8
·085506
·
IF 1.151
Wang Ye,Jin Xiang,Feng Huang,Dingyong Zhong
Titanium dioxide (TiO2) is a widely used electron transport material in organic-inorganic hybrid perovskite solar cells (PSCs). In order to reveal the influence of an additional mesoporous TiO2 (mp-TiO2) layer on fabricating large-area perovskite solar cells using TiO2 as the electron transport layer, we have conducted a comprehensive study on the solution-processed PSCs with or without an additional mp-TiO2 layer. Photoemission spectroscopy measurement indicates that, compared with the compact TiO2 (cp-TiO2) layers, the mp-TiO2 layers possess a slightly larger work function, which will improve the electron extraction efficiency at the perovskite-TiO2 interface. The PSCs with an additional mp-TiO2 layer exhibit better performances than those with only a cp-TiO2 layer. They suffer from a smaller efficiency loss when enlarging the device area from 0.16 to 1.44 cm2 and exhibit a better long-term stability. About 89% of the initial efficiency is retained after keeping in dry air for 1000 h for the device with an active area of 1.44 cm2. For both cases, increasing the active device area is beneficial to long term stability, photoluminescence measurement indicates that this is result from the degradation of perovskite films starts at the margin of the cells. Our work implies the indispensable role of the additional mp-TiO2 layer for optimizing the performances of large-area PSCs using TiO2 as the electron transport layer.
研究领域:
材料科学
·
能源技术
·
光电领域
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yue Qin,Huimin Zhang,Qilin Yuan,Hanzhuang Zhang,Jiajia Ning,Wenyu Ji
Inorganic semiconductor nanocrystals (NCs) are considered potential emitters for next-generation displays due to their special quantum size confinement effect. Herein, Cd-free AgInZnS (AIZS) NCs were produced via the cation exchange reaction from AgIn5S8 NCs for light-emitting diodes as green emitters. AIZS NC-based light-emitting diodes showed a maximum current efficiency of 6.34 cd/A and an external quantum efficiency of 1.3%, which are the highest values for AIZS NC-based light-emitting diodes for green emitters so far. The composition of AIZS NCs produced with different ligands can vary the band gap structure of AIZS NCs, affecting the balance of charge injections in the device to induce different performances of AIZS NC-based light-emitting diodes.
研究领域:
材料科学
·
纳米技术
·
光电领域
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Zhaoxiang Huai,Lixin Wang,Yansheng Sun,Rui Fan,Shahua Huang,Xiaohui Zhao,Xiaowei Li,Guangsheng Fu,Shaopeng Yang
Various cathode interface materials have been used in organic solar cells (OSCs) to realize high performance. However, most cathode interface materials have their respective weaknesses in maximizing the efficiency or stability of OSCs. Herein, three kinds of alcohol-soluble cathode interfacial materials are combined with bathocuproine (BCP) to serve as multifunctional bilayer cathode buffers for the regular OSCs, and thus greatly enhanced power conversion efficiencies over 10.11% and significantly improved device stability have been achieved. By utilizing double interlayers, both light absorption and light distribution in active layer are improved. Furthermore, double interlayers offer favorable energy-level alignment, alcohol treatment, and duplicate protection of active layer, resulting in significantly reduced leakage current, suppressed recombination, and efficient charge collection. The improved device stability is related to the blocking effect of the complex formed between BCP and the metal electrode and the additional protection effect of the underlying alcohol-soluble materials. In view of the universal use of alcohol-soluble organic electrolyte as cathode buffer layers and by courtesy of the superiority of the double cathode layers relative to the monolayer controls, the double interlayer strategy demonstrated here opens a new way to fully exploiting the potential of OSCs and is believed to be extended to a wider application.
研究领域:
材料科学
·
能源技术
·
光电领域
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Xueliang Zhang,Xiaoman Zhang,Xiaodong Zhang,Lefu Mei,Luoxin Wang,Hua Wang,Xiangming Li,Kun Nie
Lead-free halide perovskites have excellent optoelectronic properties and have been widely studied in the optoelectronic field. A kind of all-inorganic double perovskite crystals (PCs) with high output voltage and high sensitivity was successfully synthesized via a more energy-efficient crystallization method in this study. The luminescence intensity of the perovskite crystals was significantly enhanced by Bi 3+ doping. These perovskite crystals were used to prepare red light-emitting diodes (LEDs) with color purity of up to 93.1 %. In addition, the perovskite crystals were used to modify aramid chopped fibers (ACFs)/polyphenylene sulfide (PPS) composite fibers to fabricate flexible luminescent fibers. The modified composite fibers also demonstrated exceptional piezoelectric properties. Therefore, the modified composite fiber was used to prepare a piezoelectric sensor. The maximum output voltage of the sensor could reach 50 V at room temperature with a response time of only 8 ms. The piezoelectric constant d 33 of this piezoelectric sensor was 374 pC/N, indicating that the sensor had high sensitivity. When the temperature increased to 373 K, the output voltage gradually rose to 100 V. The red and white LED devices demonstrated the potential of perovskites for lighting and display applications. Meanwhile, the flexible light-emitting fibers and piezoelectric sensors further expanded the application scope of perovskite in multifunctional optoelectronic devices.
研究领域:
材料科学
·
光电领域
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 14
·6719-6726
·
IF 6.97
Jie-Ling Xie,Zhao-Qian Huang,Bin Wang,Wei-Jun Chen,Wen-Xiu Lu,Xin Liu,Jun-Ling Song
The development of nontoxic and stable all-inorganic perovskite nanocrystals (NCs) represents a major challenge to unlock widely practical applications in photoelectric fields. It is an effective strategy to discover nontoxic metal perovskite nanocrystals (NCs) with excellent optical properties. In addition, it has been proved that alkali metals such as rubidium (Rb) and potassium (K) have a good influence on improving the optical performance of perovskites. Hence, we reported new lead-free perovskite Rb7Bi3Cl16 single crystals, which displayed a zero-dimensional cluster structure and were composed of two kinds of octahedra with different distortions. At the same time, we synthesized its NCs, which showed a blue emission at 437 nm with a PLQY of 28.43% and presented a good optical and moisture stability for one month. The excellent moisture-stability might be attributed to their much higher ratio of Rb atoms and the ideal [BiCl6]3− octahedra on the surface, which are beneficial to form an inorganic BiOCl shell to protect the Rb7Bi3Cl16 NCs from moisture attack.
研究领域:
材料科学
·
光电领域
✓ 已验证
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Qi Pan,Jingjing Hu,Jie Fu,Yi Lin,Chen Zou,Dawei Di,Yunjun Wang,Qiao Zhang,Muhan Cao
The instability of perovskite nanocrystals (NCs) to moisture, heat, and blue light severely hinders their commercial applications in quantum dot displays. Here, organic semiconducting molecules are introduced onto CsPbBr3 NCs, and the as-obtained CsPbBr3 NCs have a high photoluminescent quantum yield (PLQY) of 82% and extremely high stability in harsh commercial accelerated operational stability tests (such as high temperature (85 °C) and high humidity (85%)). The products can survive and maintain more than 80% of the initial PL intensity value under high temperature, high humidity, and long-term blue light irradiation for hundreds to thousands of hours. They are among the most stable perovskite NCs and even superior to those encapsulated by inert shells and commercial green-emissive CdSe@ZnS quantum dots (QDs). The mechanism of the exceptional stability has been proposed, mainly including the strong interaction and moderate photocarrier transfer between the quasi type II heterostructure formed by the molecule and CsPbBr3. By using these stable CsPbBr3 NCs, a QD-enhanced liquid crystal display prototype has been successfully fabricated with a wide color gamut. This work provides understandings on the functionality of ligands in perovskite fields and a promising prospect in perovskite-based display technologies.
研究领域:
材料科学
·
光电领域
·
显示技术
✓ 已验证
DOI
PubMed
高影响因子
ACS Nano
·
2022
·
IF 18.027
Wei Dong,Xiaoyu Zhang,Fan Yang,Qingsen Zeng,Wenxu Yin,Wei Zhang,Haoran Wang,Xuyong Yang,Stephen V. Kershaw,Bai Yang,Andrey L. Rogach,Weitao Zheng
Close attention to the interfaces of solution-processed metal halide perovskite-based light-emitting devices (LEDs) is crucial for their optimal performance. Solution processing of these devices typically leads to the formation of van der Waals interfaces with a weak connection between different functional layers, leaving great room for improvement in charge transport through strengthening of the interlayer interaction. Here, we have realized a hydrogen-bond-assisted interface that makes use of ultrasmall amine-terminated carbon dots to enhance the interaction between the hole transport layer made of PEDOT:PSS and the hybrid lead bromide perovskite emitting layer, which not only promotes the hole injection efficiency but also orients the quasi-2D perovskite crystals penetrating the vertical direction of the device without any, or very few, horizontal grain boundaries, which has a profound effect on the photophysical and transport properties of the emitting layer. As a result, LEDs based on quasi-2D perovskites show up to 24.5% external quantum efficiency, 80 000 cd m–2 brightness, and over 5-fold extended longevity.
研究领域:
材料科学
·
光电领域
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yishan Li,Xiaohong Tan,Shaoru Wu,Wenping Hong,Jiamin Luo,Shanshan Zhao,Libo Sun,Jinming Lin,Qiang Chen,Maosheng Zhang
Organic-inorganic halide perovskite nanocrystals (PNCs) have been extensively utilized in the field of sensing, attributed to their superior optoelectronic properties, including high photoluminescence quantum yield, tunable band gap, and narrow full width at half maximum. However, the majority of sensors based on PNCs have traditionally relied on a single fluorescence signal emission and its intensity variations, leading to limitations in visualization resolutions. Hence, we developed a rapid, sensitive, and visually discernible dual-emission ratiometric fluorescence sensor for the detection of methylamine (MA) gas that based on the in situ formation of methylamine lead bromide (MAPbBr 3 ) PNCs within europium metal-organic frameworks (Eu-MOFs) in the ambient atmosphere. In this strategy, Eu-MOFs not only served as the protective matrices to enhance the stability of MAPbBr 3 PNCs but also as luminescent materials in ratiometric fluorescence sensing, owing to their exceptional luminescent properties. More importantly, benefiting from the excellent gas adsorption properties and protective abilities of MOFs, the proposed sensor demonstrates higher sensitivity, stability, and reproducibility. Experimental results indicated a good linear correlation with MA concentrations ranging from 9.0 to 90.0 ppm, achieving a limit of detection as low as 1.0 ppm. In comparison to other reported methodologies, this approach demonstrates a remarkably short response time of 20 seconds.
研究领域:
材料科学
·
分析化学
·
光电领域
✓ 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）