Solar RRL
·
2026
·Vol. 10
·期 9
·e70362
·
IF 4.8
Yingjun Zhou,Chuanhe Ma,Shulei Liang,Yujun Li,Hailong Wang
In Cu 2 ZnSn(S, Se) 4 (CZTSSe) solar cells, the conventional magnetron-sputtered ZnO (ZnO-SP) suffers from high cost, low efficiency, and interface damage. This study systematically compares sol–gel ZnO (ZnO-SG) and 18C6 crown ether-modified sol–gel ZnO (ZnO-SG-18C6) as interfacial layers. X-ray diffraction (XRD), scanning electron microscope (SEM), AFM, and X-ray photoelectron spectroscopy (XPS) show ZnO-SP has a uniform hexagonal wurtzite structure, whereas ZnO-SG displays an amorphous fibrous morphology with bright/dark striations. Both exhibit similar UV absorption peaks, but ZnO-SG shows broader absorption and double-exponential decay. Density–voltage ( J – V ) tests reveal that ZnO-SG-18C6 increases PCE from 8.5% to 10.6%, surpassing the 9.5% achieved with ZnO-SP. Electrochemical impedance spectroscopy (EIS) analysis shows that the ZnO-SG-18C6 layer reduces carrier recombination, with the charge transfer resistance ( R ct ) increasing by 30%. Transient photocurrent measurements further reveal that it enhances the photocurrent response, achieving a 1.8-fold increase in the peak, which rises to four times under a 70% high duty cycle.This work demonstrates ZnO-SG-18C6 as a low-cost, high-efficiency alternative to ZnO-SP in CZTSSe solar cells.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Junyang Chen,Chenenze Jiang,Genglong Chen,Rongting Qin,Kuan Sun,Zhicheng Xiong,Xingwu Yan
Gradient-bandgap photodetectors are promising for their superior carrier separation and broadband spectral sensitivity, enabled by the continuous band alignment within the device. However, the controlled formation of gradient bandgap structures in AgInS 2 (Se) is hindered by its rapid selenization, which readily leads to heavily selenized products and thus poor compositional gradation. To address this challenge, this study introduces a non-stoichiometric engineering strategy by precisely modulating the Ag/In ratio. Slightly reducing the Ag/In ratio effectively slows the selenization kinetics due to an increased reaction barrier and film densification, thereby suppressing Kirkendall effect-related defects and strengthening the built-in electric field and breakdown strength. This leads to a dramatic enhancement in the device's responsivity and response speed. The optimized AgInS 2 (Se) thin-film photodetector with Ag/In ratio = 0.9/1.1 achieves high responsivities of 13.64 A·W⁻¹ at 760 nm and 1.075 A·W⁻¹ at 1050 nm under a –2 V bias, with external quantum efficiencies reaching 2226% and 127%, respectively. The device also exhibits a 3 dB bandwidth of 0.33 MHz and fast response times of 0.79 μs (rise) and 3.18 μs (decay). This work offers a novel material design and process control strategy for the scalable fabrication of high-performance gradient-bandgap photodetectors.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yechen Qian,Xianglong Dai,Wenyao Li,Zhidong Ma,Shiqi Zhang,Ying Zhan,Jiao Li,Huayu Lei,Xiangyu Hu,Xiaolong Lin,Jinguo Wang,Shijie Li
The oxygen evolution reaction (OER) is a pivotal step limiting the efficiency of hydrogen production via water splitting. Developing active and durable non-noble metal electrocatalysts remains challenging. Herein, we propose a strategy combining reconstruction-enabled electronic modulation with an integrated metal-support design. Selenium-modulated CoFeNi/CeO 2 electrocatalysts were synthesized via a cerium-assisted coordination strategy followed by a NaBH 4 -induced reductive surface etching and reconstruction process. The catalyst exhibits a flower-like nanosheet architecture, where oxygen vacancies in CeO 2 interact with selenium-related compositional deviation to regulate the electronic structure of metal centers and optimize the adsorption of reaction intermediates. In alkaline media, the catalyst achieves an overpotential of 247 mV at 10 mA cm −2 , outperforming commercial RuO 2 (322 mV), and a low Tafel slope of 37.91 mV dec −1 . It also demonstrates robust stability over 30 h. Density functional theory (DFT) calculations reveal that reduction-induced selenium redistribution and oxygen-vacancy-associated charge transport cooperatively facilitate proton-coupled electron transfer, accelerating key OER steps. This work establishes a dual-site electronic modulation strategy for efficient OER catalyst design and provides a promising pathway for developing economical and durable electrocatalysts for water-splitting technologies.
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高影响因子
Science Advances
·
2026
·Vol. 12
·期 13
·
IF 13.9
Yuxiang Zhan,Kunpeng Zhao,Hexige Wuliji,Yifan Yuan,Xiang Liu,Tian-Ran Wei,Ting Zhang,Min Zhu,Xun Shi
(Ag,Cu) 2 (S,Se,Te) alloys, as rare examples of p-type inorganic ductile semiconductors, have emerged as promising candidates for wearable electronics because of their mechanical flexibility and favorable processability. However, the multicomponent nature of this system introduces diverse microstructures and intricate defect landscapes that complicate the optimization of thermoelectric performance. Here, we reveal the presence of compositionally inhomogeneous yet structurally coherent nanoscale chemical fluctuations within this alloy system. These fluctuations, together with abundant dislocations and twin boundaries, serve as efficient phonon scattering centers to suppress the lattice thermal conductivity to approach glass-like levels. Concurrently, tuning the cation ratios and vacancies allows for precise control over the carrier concentration and thereby leads to enhanced power factors. Last, a peak zT of 0.98 at 360 kelvins is achieved, marking a record for Ag-based ductile thermoelectrics. This study highlights the essential role of chemical fluctuations in modulating phonon and charge transports and offers valuable insight into the microstructure-defect–property interplay in ductile materials.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huanmin Yao,Haibao Mu,Wenrui Tian,Andrea Cavallini,Maoqun Shen,Wendong Li,Daning Zhang,Haoxiang Zhao,Guanjun Zhang
Advanced power modules are evolving toward higher operation voltage and miniaturization, imposing stringent challenges on the electro-thermal co-optimization of packaging materials. However, conventional doping strategies are constrained by the orientation and spatial distribution of fillers, making it difficult to simultaneously achieve high thermal conductivity and excellent electrical insulation. Precisely regulating filler orientation and spatial distribution to maximize electro-thermal synergy remains a critical challenge. This study proposes a synergistic AC-DC combined electric field induction strategy to achieve precise control over filler orientation and targeted enrichment. The AC electric field drives the electrorotation and attraction of SiC whiskers (SiCw), allowing precise orientation to maximize their nonlinear electrical conductivity and thermal conduction properties. Meanwhile, the DC electric field induces the electrophoretic migration of SiCw toward regions of high electric and thermal field concentration, enabling device-level targeted optimization. Experimental results demonstrate that this strategy enhances the thermal conductivity of SiCw/silicone elastomer (SE) composites by 333 % (reaching 0.65 W/(m·K)) while maintaining excellent thermal stability. Additionally, the nonlinear electrical conductivity coefficient is tunable within the range of 0.9 to 4.9, and the switch-field strength is reduced to 1.07 kV/mm, showing superior electric field responsiveness. Further simulations and experiments reveal that the composite reduces peak electric field stress by 32.5 % and increases the partial discharge inception voltage (PDIV) by 54.4 %, significantly enhancing the insulation reliability of power modules. This breakthrough in electro-thermal performance optimization marks a significant advancement in the electrical insulation and thermal protection of high-voltage power modules.
研究领域:
材料科学
·
电力电子学
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Advanced Energy Materials
·
2023
·Vol. 14
·期 10
·2303473
·
IF 27.8
Heyang Chen,Chenlu Shao,Shaoji Huang,Zhiqiang Gao,Haoran Huang,Zhenyu Pan,Kunpeng Zhao,Pengfei Qiu,Tian-Ran Wei,Xun Shi
The discovery of ductile Ag 2 (S, Se, Te) materials opens a new avenue toward high-performance flexible/hetero-shaped thermoelectrics. Specifically, the cubic-structured materials are quite attractive by combining remarkable plasticity, decent thermoelectric figure of merit ( zT ), and no phase transition above room temperature. However, such materials are quite few and the understanding is inadequate on their mechanical and thermoelectric properties. Enlightened by the high-entropy principles, a series of pseudo-ternary Ag 2 S-Ag 2 Se-Ag 2 Te alloys is designed and comprehensive diagrams of composition-structure-plasticity- zT are compiled. Subsequently, the compositional region for the cubic phase is outlined. As a high-entropy example featuring with anion-site alloying and disordered Ag ions, Ag 2- x S 1/3 Se 1/3 Te 1/3 materials exhibit impressively large elongations of 60–97%, ultralow lattice thermal conductivities of ≈0.2 W m −1 K −1 , and decent zT values of 0.45 at 300 K, 0.8 at 460 K. The materials can be readily rolled into thin foils, showing excellent flexibility. Finally, a six-leg in-plane device is fabricated, achieving an output voltage of 13.6 mV, a maximal power of 12.8 µW, and a power density of 14.3 W m −2 under the temperature difference of 30 K, much higher than the organic counterparts. This study largely enriches the members of cubic ductile inorganic materials for the applications in flexible and hetero-shaped energy and electronic devices.
研究领域:
材料科学
·
凝聚态物理
·
无机固体化学
·
热电转换
·
柔性电子学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Gangyong Li,Siping Li,Zhi Li,Chen Li,Zhaodi Wang,Huan Li,Rui Chen,Miao Zhou,Bao Zhang,Zhaohui Hou
Rechargeable aluminum batteries (RABs) are promising alternatives to lithium-ion batteries in large-scale energy storage applications owing to the abundance of their raw materials and high safety. However, achieving high energy density and long cycling life simultaneously holds great challenges for RABs, especially for high capacity transition metal selenide (TMS)-based positive materials suffering from structural collapse and dissolution in acidic ionic liquid electrolyte. Herein, Se-doped carbon encapsulated Cu 2 Se with yolk-shell structure (YS/Se-C@Cu 2 Se) is rationally constructed to address such issues. Electrochemical and spectroscopic analyses as well as density functional theory calculations show that the highly conductive Se–C shell enhances the electrochemical reaction kinetics of the electrode and provides strong adsorption for the soluble Cu and Se species. Benefiting from these merits, the optimal YS/Se-C@Cu 2 Se cathode manifests a high specific capacity of 1024.2 mAh/g at 0.2 A/g, a superior rate capability of 240.5 mAh/g at 3.2 A/g, and a long-term cycling stability over 2500 cycles. This work offers a feasible approach to the design and construction of low-cost and efficient TMS-based positive materials for realizing practically usable RABs.
研究领域:
材料科学
·
电化学
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qihang Sun,Baoyu Li,Jiaxin Hu,Hongquan Fu,Juan Zhang,Jinming Chang,Hejun Gao,Yunwen Liao
U(VI) in nuclear wastewater threatens human health and the environment due to its high toxicity and mobility. Photocatalysis is seen as a promising, simple, low-cost, and sustainable method for wastewater treatment, but existing photocatalysts face challenges like complex preparation and severe electron-hole recombination. In this work, ellipsoidal Se-linked ZnSe/ZnO was in situ constructed using a simple one-pot hydrothermal method, with non-metallic selenium serving as the carrier. In 30 minutes, the removal rate of U(VI) can reach 90.2 % in 100 mg/L U(VI) solution. The reaction kinetics of the optimal Se/ZnSe/ZnO ratio reached 0.14939 min −1 , which is nearly 10 times that of pure ZnO. Photocatalytic analysis revealed that introducing Se as the medium for electron transport in the composite material can effectively reduce electron-hole recombination, thereby enhancing photocatalytic efficiency. The results of this study offer a simple and efficient new method for photocatalytic reduction of U(VI) and provide an effective strategy for establishing a conductive medium in the heterojunction using a one-pot hydrothermal method.
研究领域:
环境科学
·
材料科学
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高影响因子
Heliyon
·
2024
·
IF 3.4
Huimin Zhang,Nan Zhang,Zhourui Liu,Ke Jiang,Xiaofeng Zhou
The utilization of water energy through the Single Electrode Droplet-Based Electricity Generator (SE-DEG) represents a universal and high-efficiency method for water energy harvesting. Previous research has extensively elucidated the working principle of SE-DEG based on bulk effect. However, scant attention has been paid to the investigation of the electrical characteristics surrounding the SE-DEG. Remarkably, the electrical characteristics around the SE-DEG can be exploited to generate electricity and harvest corresponding energy. Here we evaluate the electrical characteristics around the SE-DEG by arranging extra electrodes. An interesting phenomenon is found that, on the premise of no contact between extra electrodes and the droplet, there is opposite electricity output from extra electrodes synchronously when the droplet contacts on the PTFE film and SE-DEG electrode and outputs the electricity. This phenomenon is comprehensively explained and verified from working mechanism, the impacts of different arrangements and the array design of extra electrodes. Significantly, utilizing the electrical characteristics could harvest additional kinetic energy with extra electrodes in SE-DEG. This investigation is expected to provide new insights into the future harnessing of water kinetic energy within the SE-DEG framework.
研究领域:
能源科学
·
材料科学
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.3
Wenting Fan,Yijiao Wang,Xiuying Jin,Yugen Zhang,Xiang Zhang,Tengfei Zhang
Sulfide-based solid-state electrolytes (SSEs) are attractive candidates for high-energy all-solid-state lithium-ion batteries due to their high ionic conductivity. However, the intrinsic chemical instability against Li metal leads to continuous interfacial degradation. Herein, we design a gradient hybrid electrolyte by introducing a borohydride-based interfacial buffer to achieve complete anode-electrolyte isolation without sacrificing energy density. The borohydride component, with its intrinsic reducibility and deformability, facilitates the formation of a stable solid electrolyte interphase (SEI) while maintaining ionic transport comparable to pristine sulfide SSEs. Benefiting from this interfacial stabilization, the hybrid SSE enables long-term cycling over 2000 h and delivers a high specific capacity of 516.3 mAh g–1 at 10 C with selenium cathode featuring dual-electron reactions. This study demonstrates that borohydride-mediated interfaces effectively suppress parasitic reactions and provide a universal and scalable strategy to unlock the potential of sulfide-based solid-state batteries.
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Nanomaterials
·
2022
·Vol. 12
·期 5
·815
·
IF 5.719
Yang Xia,Zheng Fang,Chengwei Lu,Zhen Xiao,Xinping He,Yongping Gan,Hui Huang,Guoguang Wang,Wenkui Zhang
Conventional lithium-ion batteries with a limited energy density are unable to assume the responsibility of energy-structure innovation. Lithium-selenium (Li-Se) batteries are considered to be the next generation energy storage devices since Se cathodes have high volumetric energy density. However, the shuttle effect and volume expansion of Se cathodes severely restrict the commercialization of Li-Se batteries. Herein, a facile solid-phase synthesis method is successfully developed to fabricate novel pre-lithiated Li2Se-LiTiO2composite cathode materials. Impressively, the rationally designed Li2Se-LiTiO2composites demonstrate significantly enhanced electrochemical performance. On the one hand, the overpotential of Li2Se-LiTiO2cathode extremely decreases from 2.93 V to 2.15 V. On the other hand, the specific discharge capacity of Li2Se-LiTiO2cathode is two times higher than that of Li2Se. Such enhancement is mainly accounted to the emergence of oxygen vacancies during the conversion of Ti4+into Ti3+, as well as the strong chemisorption of LiTiO2particles for polyselenides. This facile pre-lithiated strategy underscores the potential importance of embedding Li into Se for boosting electrochemical performance of Se cathode, which is highly expected for high-performance Li-Se batteries to cover a wide range of practical applications.
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高影响因子
SOLAR ENERGY
·
2023
·
IF 6.7
Yonggang Zhao,Qiaogang Song,Zhineng Zhou,Yufei Chen,Ying Zhang,Lang Wu,Xu Su,Xinghuan Hu,Shurong Wang
In the solution method, the surface morphology characteristic of the precursor film is essential for obtaining the high quality of the absorber layer. Herein, the post-heating treatment (PHT) precursor films were adopted to modify the morphology significantly and the effects of different PHT temperatures on the properties of precursor films, absorber layer films, and photovoltaic devices were investigated. The precursor film with a more porous surface could be obtained by PHT, which facilitates the downward diffusion of Se easily during sulfoselenization and the formation of a large-grain-spanning monolayer structure. Furthermore, the Cu 2 ZnSn(S, Se) 4 absorber layer surface holes were significantly reduced, owing to sufficient grain growth during sulfoselenization. As a result, the device efficiency with PHT was increased to 11.07% mainly due to improved Cu 2 ZnSn(S, Se) 4 absorber spectral response. This study might provide a new potential method for adjusting precursor film morphology and thus enhancing the corresponding device performance.
研究领域:
光伏技术
·
材料科学
·
薄膜太阳能电池
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高影响因子
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