Materials
·
2020
·Vol. 13
·期 5
·1206
·
IF 3.057
Danni Zhang,Baolin Sun,Hui Huang,Yongping Gan,Yang Xia,Chu Liang,Wenkui Zhang,Jun Zhang
Solar-driven electrochromic smart windows with energy-storage ability are promising for energy-saving buildings. In this work, a flexible photoelectrochromic device (PECD) was designed for this purpose. The PECD is composed of two flexible transparent conductive layers, a photocatalytic layer, an electrochromic material layer, and a transparent electrolyte layer. The photocatalytic layer is a dye-sensitized TiO2thick film and the electrochromic layer is a WO3thin film, which also possesses a supercapacitive property. Under illumination, dye-sensitized TiO2thick film realizes photo-drive electrochromism that the WO3changes from colorless to blue with large optical modulation. Meanwhile, the PECD has an electrochemical supercapacitance showing an energy storage property of 21 mF·cm−2(114.9 F·g−1vs the mass of WO3), stable mechanical performance and long cycle performance. The PECD can effectively adjust the transmittance of visible and near-infrared light without any external power supply, realizing zero energy consumption, and can convert solar energy into electrical energy for storage.Keywords:photoelectrochromic devices (PECD);dye-sensitized solar cells (DSSC);electrochromic devices (ECD);smart windows;flexible devices
研究领域:
材料科学
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能源技术
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 7
·3924-3930
·
IF 4.036
Ting Zhang,Shasha Zhang,Zhenkun Gu,Rudai Zhao,Shiheng Wang,Lutong Guo,Tiesheng Li,Yiqiang Zhang,Yanlin Song
Paper is ubiquitous in the daily life and has been widely used for writing and drawing because of their low-cost, widely accessible, and degradable properties. However, simple ways to fabricate paper-based optoelectronic devices remain a great challenge. In this work, we report a facile method to fabricate high-quality perovskite films and optoelectronic devices on paper by direct pen-writing. Through introducing seed layers on papers, planar-integrated single-crystal perovskite films are easily prepared using commercial pens. Based on such a simple and convenient method, perovskite photodetector arrays and image sensors with graphite electrodes are fabricated on paper, and show satisfactory performances. This method provides a simple and effective approach for preparation of paper-based perovskite devices. It will be of significance for the development of degradable optoelectronic devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Laser & Photonics Reviews
·
2023
·Vol. 17
·期 12
·2300476
·
IF 11
Wenhai Sun,Xiang Zhang,Hulin Zhang,Zichen Ren,Mingjun Chen,Yingjun Xiao,Zitong Li,Jianbo Deng,Dukang Yan,Leipeng Zhang,Yao Li
The development of electrochromic devices (ECDs) that can dynamically modulate infrared (IR) emissivity while maintaining a wide color gamut distribution for visible (VIS)-IR compatible spectral manipulation has been a long-standing challenge. Current ECDs are limited by simultaneous changes in IR emissivity and VIS colors when subjected to external potential, restricting their potential applications. This work presents, for the first time, VIS–IR compatible ECDs capable of displaying VIS multicolor and dynamically modulating IR emissivity via a Ge/HfO 2 Fabry–Perot cavity structure. The all-solid-state VIS-IR compatible ECD with the structure of ITO/NiO/Ta 2 O 5 /Li/WO 3 /ITO/Ge/HfO 2 achieves not only emissivity modulation of 0.20 at potentials of −2.5 V and +2.5 V in the wavelength range of 2.5–25 µm, but also, due to the presence of Fabry–Perot cavity, the novelty compatible device structure achieves static multicolor modulation, thus decoupling VIS and IR emissivity modulation. Additionally, a flexible VIS-IR compatible ECD based on polyaniline is also constructed. This novel approach offers a promising possibility for multispectral compatible manipulation, VIS multicolor, and IR signal processing applications.
研究领域:
材料科学
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光学工程
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纳米光子学
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功能材料
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智能器件
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表面物理
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能源材料
✓ 已验证
DOI
高影响因子
SENSORS
·
2024
·Vol. 24
·期 23
·7788
·
IF 3.4
Yongqing Yue,Zixia Yu,Fangpei Li,Wenbo Peng,Quanzhe Zhu,Yongning He
Neuromorphic computing, inspired by the brain, holds significant promise for advancing artificial intelligence. Artificial optoelectronic synapses, which can convert optical signals into electrical signals, play a crucial role in neuromorphic computing. In this study, we successfully fabricated a flexible artificial optoelectronic synapse device based on the ZnO/PDMS structure by utilizing the magnetron sputtering technique to deposit the ZnO film on a flexible substrate. Under UV light illumination, the device exhibits excellent synaptic plasticity, including excitatory postsynaptic current (EPSC), short-term potentiation (STP), and paired-pulse facilitation (PPF). By growing ZnO nanowires, we improved the fabrication processes and further enhanced the synaptic properties of the device, demonstrating long-term potentiation (LTP) and the transition from short-term memory (STM) to long-term memory (LTM). Additionally, the device exhibits outstanding flexibility, maintaining stable synaptic plasticity under bending conditions. This device shows broad application potential in mimicking visual systems and is expected to contribute significantly to the development of neuromorphic computing.
研究领域:
材料科学
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神经科学
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人工智能
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光电技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science Advances
·
2021
·Vol. 7
·期 16
·
IF 14.143
Zhongwu Wang,Hongzhen Lin,Xi Zhang,Jie Li,Xiaosong Chen,Shuguang Wang,Wenbin Gong,Hui Yan,Qiang Zhao,Weibang Lv,Xue Gong,Qingbo Xiao,Fujin Li,Deyang Ji,Xiaotao Zhang,Huanli Dong,Liqiang Li,Wenping Hu
Interface stresses are pervasive and critical in conventional optoelectronic devices and generally lead to many failures and reliability problems. However, detection of the interface stress embedded in organic optoelectronic devices is a long-standing problem, which causes the unknown relationship between interface stress and organic device stability (one key and unsettled issue for practical applications). In this study, a kind of previously unknown molecular conformation–induced stress is revealed at the organic embedded interface through sum frequency generation (SFG) spectroscopy technique. This stress can be greater than 10 kcal/mol per nm 2 and is sufficient to induce molecular disorder in the organic semiconductor layer (with energy below 8 kcal/mol per nm 2 ), finally causing instability of the organic transistor. This study not only reveals interface stress in organic devices but also correlates instability of organic devices with the interface stress for the first time, offering an effective solution for improving device stability.
研究领域:
材料科学
·
光电子学
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光谱学
·
固体物理
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaoqi Mao,Yongjin Zou,Fen Xu,Lixian Sun,Hailiang Chu,Huanzhi Zhang,Jian Zhang,Cuili Xiang
The three-dimensional (3D) architecture of electrode materials with excellent stability and electrochemical activity is extremely desirable for high-performance supercapacitors. In this study, we develop a facile method for fabricating 3D self-supporting Ti3C2 with MoS2 and Cu2O nanocrystal composites for supercapacitor applications. MoS2 was incorporated in Ti3C2 using a hydrothermal method, and Cu2O was embedded in two-dimensional nanosheets by in situ chemical reduction. The resulting composite electrode showed a synergistic effect between the components. Ti3C2 served as a conductive additive to connect MoS2 nanosheets and facilitate charge transfer. MoS2 acted as an active spacer to increase the interlayer space of Ti3C2 and protect Ti3C2 from oxidation. Cu2O effectively prevented the collapse of the lamellar structure of Ti3C2–MoS2. Consequently, the optimized composite exhibited an excellent specific capacitance of 1459 F g–1 at a current density of 1 A g–1. Further, by assembling an all-solid-state flexible supercapacitor with activated carbon, a high energy density of 60.5 W h kg–1 was achieved at a power density of 103 W kg–1. Additionally, the supercapacitor exhibited a capacitance retention of 90% during 3000 charging–discharging cycles. Moreover, high mechanical robustness was retained after bending at different angles, thereby suggesting significant potential applications for future flexible and wearable devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 74
·70452-70459
·
IF 3.289
Makkawi Osman,Yanmin Huang,Wei Feng,Guangbo Liu,Yunfeng Qiu,PingAn Hu
Phase engineering of two-dimensional (2D) materials offers unique opportunities for acquiring novel opto-electronic properties and allows for the searching of outstanding candidates for applications in opto-electronic detectors, sensors, catalysis, or phase-change memory devices. Here, we report the phase-transformation from β-InSe to γ-In2Se3, exploiting the thermal annealing route to trigger the process starting at 200 °C that expands the family of phase-change materials. The presence of γ-In2Se3 is solidly confirmed by the characteristic peaks in X-ray diffraction (XRD) and energy dispersive X-ray (EDX), and is quite stable at ambient condition, thus facilitating substantial application in phase-change memory devices. A Raman shift in the A′1 mode from 225 cm−1 to 230 cm−1 further illustrates the phase transformation. Besides the photoluminescence (PL) peak of β-InSe, the ∼2 eV PL peak, ascribed to γ-In2Se3, is observed in the annealed nanosheet. The increased PL band gap of β-InSe as a function of annealing temperature during phase transformation was possibly affected by the suppressed interlayer coupling, as well as the planar quantum confinement of photo-excited carriers by the external surfaces of the sheets. The photodetector performance with respect to photocurrent, mobility, detectivity, responsivity, and external quantum efficiency was subsequently evaluated after thermal annealing, showing deteriorated optical performance. The present work proved that thermal annealing could induce the successful phase transformation, and adjusted the opto-electronic properties in some extent, providing useful information for processing 2D materials based nano-devices.
研究领域:
材料科学
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光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2021
·Vol. 6
·期 3
·2100554
·
IF 8.582
Daiyu Li,Pei Jiang,Wenhao Zhang,Jiankang Du,Chen Qiu,Jiale Liu,Yue Hu,Yaoguang Rong,Anyi Mei,Hongwei Han
Perovskite solar cells (PSCs) have achieved a certified power conversion efficiency (PCE) of 25.5% and show potential for low-cost photovoltaic applications. One key of pushing PSCs into industrialization is enlarging their areas. However, the PCE of larger-area PSCs is dramatically limited by the undesired increase in series resistance ( R S ), which leads to obvious loss of fill factor (FF). Herein, R S in fully printable mesoscopic PSCs is modulated with a carbon electrode by optimizing the device geometry, preparing busbars to collect currents from electrodes and improving the conductivity of the back electrode. A rectangular device shape and tin busbars on conductive substrate effectively reduce the R S . Meanwhile, an additional hot-pressed highly conductive low-temperature carbon layer on the back carbon electrode also reduces the R S . An enhanced PCE of 13.99% for 1 cm 2 PSCs by R S modulation is obtained, whereas the control device exhibits a PCE of 7.74%. The PCE increase is due to the improvement of FF from 0.372 to 0.638 with reduced R S from 27.13 to 9.66 Ω cm 2 .
研究领域:
材料科学
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能源材料
·
光伏技术
·
纳米结构材料
·
电化学
·
器件物理
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 25
·2424645
·
IF 19
Zhefeng Liu,Rui Wang,Jianing Han,Tianhao Chen,Zichao Deng,Yalan Sun,Yongbin Zhao,Aihua Chen
Wearable blue-green photodetectors have attracted considerable attention in underwater and medical applications. However, semiconductor-based photodetectors generally suffer from inevitable performance deterioration because of elastic modulus mismatch between rigid inorganic materials and polymer matrixes. Besides, most of the photodetectors reported so far can't be used on both sides and the multiple functionalizations can only be realized by stacking different types of devices. Herein, an intrinsically flexible and size-customizable blue-green photodetector has been fabricated based on well-designed composite fabrics with oriented electrospun fibers, consisting of pseudo-stilbene azobenzene-containing cross–linked liquid crystalline polymers (NAzo-CLCP) and piezoelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] nanogenerator. Taking advantage of the synergistic effect between liquid crystalline alignment and polymer networks, the NAzo-CLCP devices construct a consecutive and efficient conversion of illuminance – internal stress – electric signal. A responsivity of 233 mV W −1 is achieved in voltage signals and a comparable response time of 0.1 s in current signals compared to the reported wearable semiconductor-based photodetectors. Benefiting from the inherent flexibility and compatibility of the hydrophobic fabrics, the NAzo-CLCP devices exhibit robust stabilities under cyclic irradiations, humidity and temperature variations, and especially slightly dynamic conditions, fulfilling basic requirements for wearable electronics. For practical applications, a photodetector array for light positioning based on blue light and a bracelet for real-time health monitoring based on green light are developed. Profiting from the uniformity of the fabrics and the consistency of detection performance, the integrated bifunction of code transmission and health monitoring over a double-sided one-piece photodetector has been realized for the first time, providing extensive potential for wearable electronics based on the NAzo-CLCP fabrics.
研究领域:
生物医学工程
·
柔性电子学
·
光电传感
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可穿戴设备
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转化医学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2024
·
IF 2.8
Lu Li,Weiyi Chen,Meng Wang,Xinjiang Shi,Shiming Zhang,Debao Xiao
In this paper, we present the first application of organic hole-transporting semiconductors 4,4′,4′'-tris(carbazol-9-yl)triphenylamine (TCTA) and 4,4′-cyclohexylbis[N,N-bis(4-methylphenyl) aniline] (TAPC) in electrochromism area, demonstrating that TCTA or TAPC is suitable for use as hole-transporting materials on the anode of 1,1′-bis(3-sulfopropyl) viologen (SPV)-based electrochromic devices. For such devices, we obtain a decreased driving voltage of SPV-based electrochromic devices down to −2.0 V in the presence of TCTA or TAPC with comparison to that of ca. −2.5 V in the absence of the hole-transporting material. The optical contrast of the device increased from 57.19 % (without hole-transport layer) to 66.41 % (TCTA) or 62.97 % (TAPC) at 533 nm. The response time of 66.2 s in the absence of hole-transporting layer can decrease to 30.6 s with TCTA and 62.7 s with TAPC, respectively. The coloration efficiency of the as-fabricated devices at 533 nm can reach from 67.3 cm 2 /C (SPV-only) up to 153.2 cm 2 /C (TCTA) and 80.5 cm 2 /C (TAPC). This work paved a new way for boosting electrochromic performances of viologen-based devices via electrode modification of anode by hole-transporting material TCTA and TAPC which have been used effectively and efficiently in organic electroluminescent devices and solar cells.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2025
·
IF 4.5
Chunfang Wang,Yining Wang,Faqiong Zhao,Baizhao Zeng
Organic-inorganic composite photoactive materials can combine the merits of organic and inorganic components and show better performance in comparison with single-component materials. In this work, a novel photoactive material was synthesized through chemical polymerization of 3,4-ethylenedioxythiophene (EDOT) on the surface of hydrothermally prepared Bi 2 WO 6 , followed by modification of self-polymerized dopamine (PDA). The integration of poly(3,4-ethylenedioxythiophene) (PEDOT) and Bi 2 WO 6 effectively facilitated the separation of photogenerated electron-hole pairs, thus demonstrated substantially strong photoelectrochemical signal compared to pure Bi 2 WO 6 . The PDA film, with abundant functional groups, could further sensitize the material and facilitate the immobilization of recognition units. As a proof of application, the composite was combined with carcinoembryonic antibody to construct an immunosensor for carcinoembryonic antigen sensing. Resultantly, although the components and construction procedure were simple, the prepared sensor demonstrated a broad linear detection range of 0.001–20 ng/mL and a relative low detection limit of 0.50 pg/mL. It also showed high selectivity and stability. Its practical feasibility was confirmed by detecting real samples and yielding satisfactory results.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Electronic Materials Letters
·
2022
·Vol. 18
·期 6
·519-531
·
IF 3.151
Li Ce,Gu Shaoqiang,Ma Tao,Li Dongchan
Alternative current electroluminescent device with excellent air permeability were fabricated by a facile electrospinning method, and the optimal fabrication conditions of the device substrate and light-emitting layer, such as voltage, acceptance distance, concentration, and propulsion rate, were determined. The microscopic morphology, luminance and air permeability of the samples were explored and analyzed. The characterization results show that the flexible alternative current electroluminescent device fabricated by electrospinning method exhibits excellent mechanical properties and high air permeability. The device can reach 55.74 cd/m 2 at a voltage of 130 V and a frequency of 3 kHz, and the air permeability can reach 5.81 g/(h·m 2 ). It is discussed that its excellent breathability is attributed to the overall microns fabric structure. On the basis of these results, we believe our electrospinningac process will accelerate development of more comfortable electroluminescent devices with the flexibility required for real-world applications. Graphical abstract
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）