SOLID-STATE ELECTRONICS
·
2024
·
IF 1.4
Guoxiang Song,Xinan Zhang,Haoxuan Xu
Doping is a useful technique for metal oxide thin-film transistors (TFTs) to adjust the threshold voltage and charge carrier density. However, a notable drawback is the disruption of the microstructure caused by doping crystalline lattice, leading to a partial decrease in charge carrier mobility. In this work, we suggest a surface doping technique that modifies the carrier concentration and passivates the device surface while preserving the channel layer lattice structure through the use of organic dopant molecules. It is shown that tin oxide (SnO 2 ) TFTs doped in this manner typically exhibit improved electrical characteristics, particularly greater mobility and a noticeably lower threshold voltage, without negatively affecting the devices on/off current ratio. Furthermore, compared to pristine devices, bias stress stability and long-term durability are also enhanced. These findings suggest that surface doping may find use in high-performance oxide semiconductor devices and circuits.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2024
·Vol. 8
·期 12
·2400230
·
IF 6
Zezhou Xia,Xinyu Lei,Yuwei Hu,Xiujun Liu,Yitong Ji,Dongyang Zhang,Yingying Cheng,Xiangda Liu,Zhuozheng Xu,Xueyuan Yang,Jie Zhong,Wenchao Huang
Ultrathin flexible organic solar cells (OSCs) have garnered widespread attention in wearable electronic devices for their lightweight and excellent conformability. Silver nanowires (AgNWs) are one of the most widely used bottom electrodes because of their high conductivity and transmittance. However, the high roughness of AgNWs on the flexible substrate exerts adverse effects on device performance. To address this critical issue, a bilayer electron-transport-materials (ETMs) strategy consisting of an indium-doped zinc oxide (IZO) and a pristine ZnO is developed. The IZO is utilized as the first layer of ETM, which can effectively fill voids in AgNWs to form a high-conductive composite electrode. The ZnO is used as the second layer of ETM, facilitating charge extraction. The ultrathin flexible OSCs prepared based on the gradient bilayer ETMs can achieve a power conversion efficiency (PCE) of 16.1%, associated with improved mechanical stability, showing a PCE retention of 93% after 10 000 bending cycles ( R = 1 mm) and 82% under 1000 compression (30%)-release cycling test. To the best of knowledge, it's one of the highest efficiency for ultrathin (less than 10 μm) flexible OSCs based on the solution-processed electrodes. This work will provide a new avenue for fabricating high-performance and mechanically robust ultraflexible ITO-free OSCs.
研究领域:
材料科学
·
能源技术
·
光电转换
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Jiang Haotian,Zhang Jie,Wei Li
Superior gas sensing properties may be obtained by forming suitable metal/semiconductor nanocomposites. In this work, gold (Au) was utilized to form composite nanofibers with tin oxide (SnO 2 ) to detect nitric oxide (NO) gas. Au/SnO 2 composite nanofibers were synthesized through a facile electrospinning and annealing treatment. Various techniques, including XRD, SEM, TEM, UV–vis, XPS, and BET, were used to characterize these Au/SnO 2 heterostructures. The characterization results demonstrate that Au exists in the form of metallic clusters even at an extremely low concentration of 0.1 at% and, it can provide more active sites and chemisorbed oxygen species due to its spillover effect. The gas sensing results show that the Au/SnO 2 composite nanofibers exhibit excellent sensing performance to NO at 130 °C. Specifically, the composite nanofiber with 0.1 at% Au shows an ultrahigh response of 183 (resistance ratio) to 100 ppb NO gas at 130 °C. The sensor exhibits good selectivity, repeatability, and long-term stability. These remarkable sensing properties indicate that Au/SnO 2 composite nanofibers have promising applications to some demanding fields such as detecting NO from human exhaled breath.
研究领域:
材料科学
·
环境科学
·
医学检测
✓ 已验证
产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2024
·Vol. 24
·期 14
·21792-21799
·
IF 4.3
Zhenheng Zhang,Shengyi Yang,Zhenhua Ge,Haiyuan Xin,Ying Wang,Yurong Jiang,Bingsuo Zou
Self-driven photodetectors based on flexible silicon nanowire (Si-NW) array have attracted widespread research interests since they can continuously operate without external bias. However, their practical performances are limited due to the high density of intrinsic defects introduced by the chemical etching procedure for the Si-NWs. To address this issue, first ultrathin silicon wafers are etched with a metal-assisted chemical etching method, then flexible Si-NWs are obtained, and finally, a high-performance self-driven photodetector Si/[Si-NWs/FASnBr3]/MoO3/Au, in which Si-NWs are surface passivated with FASnBr3 nanocrystals, is presented. As a result, the responsivity and specific detectivity of the self-driven photodetector reach 0.694 A/W and $2.9\times 10^{{13}}$ Jones, respectively, under $0.8~\mu $ W/cm $^{{2}}~980$ nm illumination at zero bias, with a rising time of 58.552 ms and a falling time of 43.729 ms. The enhanced device performance is mainly due to the improved surface passivating effect on the silicon nanowire surfaces by FASnBr3 nanocrystals. Thus, it provides an efficient method to passivate the surfaces of silicon nanowires, and it is a promising method to enhance the performances of self-driven Si-NW-based photodetectors.
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
Nanomaterials
·
2024
·Vol. 14
·期 5
·437
·
IF 4.4
Yanjun Xing,Zhiqiang Deng,Qiuxiang Wang,Jiaxing Xiong,Xiaohui Liu,Like Huang,Yuejin Zhu,Jing Zhang
The poor film stability of Sn-Pb mixed perovskite film and the mismatched interface energy levels pose significant challenges in enhancing the efficiency of tin–lead (Sn-Pb) mixed perovskite solar cells. In this study, polyvinylpyrrolidone (PVP) is introduced into the PVK perovskite precursor solution, effectively enhancing the overall stability of the film. This improvement is achieved through the formation of robust coordination bonds between the carbonyl (C=O) in the pyrrole ring and the undercoordinated SnIIand PbII, thereby facilitating the passivation of defects. Furthermore, the introduction of PVP inhibits the oxidation of tin (Sn), thereby enhancing the n-type characteristics of the perovskite film. This adjustment in the energy level of the PVK perovskite film proves instrumental in reducing interface energy loss, subsequently improving interface charge transfer and mitigating device recombination. Consequently, perovskite solar cells incorporating PVP achieve an outstanding champion power conversion efficiency (PCE) of 21.31%.
研究领域:
材料科学
·
太阳能技术
·
界面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE ELECTRON DEVICE LETTERS
·
2024
·Vol. 45
·期 3
·396-399
·
IF 4.1
Yilun Zhong,Jiwei Zou,Taoming Guo,Lei Han,Ye Zou,Wei Tang,Yongpan Liu,Huazhong Yang,Yunlong Guo,Chen Jiang
Transparent organic thin-film transistors (OTFTs) are promising for bioelectronics applications, by allowing simultaneous optical imaging with electrical sensing and modulation. However, the state-of-the-art transparent OTFTs have limited device performance, in terms of low mobility and high threshold voltage. This is mainly attributed to the large contact resistance induced by the energy level mismatch between the transparent electrodes and organic semiconductors. He re, we report transparent OTFTs with indium tin oxide electrodes modified by fluorinated silanes to improve device performance. It is found that the OTFTs with electrode modified by fluorinated silanes exhibit increased mobility from 0.12 cm2/ $\text{V}\cdot \text{s}$ to 1.58 cm2/ $\text{V}\cdot \text{s}$ and lower threshold voltage from–12.45 V to–2.21 V. The contact resistance of the OTFT characterized by a transmission line method, shows a reduction from over 1 $\text{M}\Omega $ to below 100 $\text{k}\Omega $ .
研究领域:
材料科学
·
电子工程
·
生物电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Linfeng Chen,Hongyang Li,Pengsen Qian,Yuqi Wang,Jianjun Zhang,Gaoran Li
Tin oxide, characterized by its exceptional theoretical capacity, emerges as a highly promising alternative anode in the pursuit of high-energy-density lithium-ion batteries (LIBs). However, inherent limitations in conductivity and structural integrity impede the fulfillment of its energy storage potential. Herein, sophisticated SnO 2 -carbon nanorods (SnO 2 /C NRs) derived from a tin-based metal-organic framework are developed for superior lithium storage. The ultrafine SnO 2 nanocrystals are embedded within a hollow and porous rod-like architecture, ensuring fast multidirectional charge transfer and well-accommodated volume variation during the lithiation/delithiation process. Moreover, the integration of the carbon matrix further promotes electron conduction and reinforces the structural integrity towards fast, efficient, and durable electrochemistry. As a result, the SnO 2 /C NRs electrodes demonstrate excellent long-term cyclability with a minimal capacity fading rate of 0.089 % per cycle over 500 cycles, and a commendable rate capability with a highly reversible capacity of 922.1 mAh g −1 at 3 C. This work establishes a unique and insightful paradigm for designing advanced electrode materials towards energy-dense next-generation LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Mingchen Xu,Xinfa Zhu,Gaoning Fan,Xiyu Jia,Yonghui Zhang,Mengjun Wang,Hongxing Zheng,Pengyu Zhou,Chao Fan
Visible photodetectors based on two-dimensional tin disulfide (SnS2) have attracted interest for applications in optical communication, information capture, and military reconnaissance owing to their high absorption efficiency, atomic-scale thickness, and nontoxicity. However, their intrinsic bandgap limits their spectral detection range, hindering further practical applications. Herein, we introduce VIII B-nickel (Ni) with a similar ionic radius to Sn to form Ni-doped SnS2 few-layers via micromechanical exfoliation. As the Ni-doping concentration increases, the bandgap decreases from 2.14 (SnS2) to 1.95 eV (Sn0.9Ni0.1S2). Subsequently, Ni-doped SnS2-based photodetectors are fabricated and characterized. These devices exhibit an extended spectral detection range and excellent performance, with a maximum responsivity of 2009 A W–1 and high normalized detectivity of 2.47 × 1012 cm Hz1/2 W–1. Furthermore, to suppress dark current and noise, SnS2/Ni-doped SnS2 homostructures and their corresponding photodetectors are fabricated. The built-in electrical field of the homostructure effectively reduces the dark current of the homostructure photodetector to 110 nA. Consequently, the responsivity is enhanced to 3350 A W–1 and the response time is reduced to 3.5 ms, outperforming most other 2D material–based and commercial photodetectors. And Ni-SnS2 VPDs show an application potential in imaging and visible-light communication systems. Thus, this study presents an effective approach to extend the detection spectrum of SnS2-based photodetectors and pave the way for their future applications.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Cell Reports Physical Science
·
2021
·
IF 0
Rongjun Zhao,Linqin Wang,Jing Huang,Xiaohe Miao,Licheng Sun,Yong Hua,Yude Wang
Electron transport layer (ETL)/perovskite interface passivation is particularly challenging because of the use of polar solvents (e.g., DMF) for perovskite solution deposition, which usually destroy the bottom as-formed defect passivation layers. Herein, a novel multifunctional composite ETL, NH 2 -ZnO@SnO 2 , is prepared by mixing amino-capped ZnO (NH 2 -ZnO) nanocrystals (NCs) with SnO 2 nanoparticles. The best-performing PSCs on the basis of NH 2 -ZnO@SnO 2 achieve efficiency of 22.52%, which is significantly higher than that of the pristine SnO 2 counterpart (18.45%). The enhanced performance of the NH 2 -ZnO@SnO 2 ETL can be attributed to higher electron extraction capacity, better energy-level alignment with perovskite material, and more efficient carrier transport in device. Most important, the NH 2 groups on the surface of ZnO NCs can effectively passivate the under-coordinated Pb 2+ ions from perovskite films, thus reducing charge recombination at ETL/perovskite interface. The results suggest that NH 2 -ZnO NCs@SnO 2 composite is a promising ETL for improving the performance of PSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Huimin Shi,Hang Zhang,Zhi Chen,Tao Wang,Lei Wang,Wei Zeng,Guanhua Zhang,Huigao Duan
Titanium nitride (TiN) has been attracting increasing interest as an anode material for electrochemical energy storage and conversion systems due to its superior thermal stability, electrical conductivity and chemical durability. The most commonly used strategy to synthesize TiN nanostructures is nitriding TiO 2 nanostructures using ammonia gas as the nitrogen source, and thus is not environmental friendly. Herein, we report an ammonia-free strategy to synthesize TiN nanomaterials using TiO 2 precursors via a magnesium-assisted nitriding reaction using nitrogen gas (N 2 ) as the nitrogen source. Systematical studies were conducted to reveal the mechanism of magnesium-assisted nitriding process in constructing TiN nanostructures under N 2 atmosphere. The as-synthesized TiN NRs were directly used as the anodes for lithium ion batteries and delivered an excellent reversible capacity of 710 mAh g −1 at the current density of 100 mA g −1 after 200 cycles. In addition, the TiN NRs also exhibited excellent cycling stability and rate capability. Our work provides a low cost, environmental friendly and reliable strategy to synthesize TiN materials from TiO 2 by using N 2 as the nitrogen source, which may facilitate the practical applications of TiN materials in electrochemical/photo-electrochemical energy storage and conversion systems.
研究领域:
材料科学
·
电化学能源存储
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Ziqi Liu,Ruolin Zhao,Feifan Hong,Sizhi Ding,Jiakun Yang,Renhuan Li,Yi Fan,Haizhen Liu,Jin Guo,Zhiqiang Lan
Hydrogen storage materials are the primary solution for addressing safety concerns in hydrogen energy storage and transportation. Despite the advantages of magnesium-based hydrogen storage materials, such as high capacity and good reversibility, their poor kinetic performances severely limit their practical applications. In this study, the synthesis of titanium nitride supported on carbon (TiN@C) was achieved through a controllable hydrothermal method , aiming to enhance the hydrogen storage performances of MgH 2 .With the catalytic action of TiN@C, MgH 2 could rapidly release over 6.0 wt% of hydrogen at 300 °C within 15 min, while the onset dehydrogenation temperature decreased to 226 °C. The dehydrogenated MgH 2 could reabsorb 5.80 wt% of hydrogen at 200 °C for 15 min with a reduced activation energy of 44.9 kJ·mol −1 , demonstrating excellent kinetic performance. Mechanism analysis revealed that the multiphase interface between MgH 2 (Mg) and TiN@C significantly improved the hydrogen desorption kinetics of materials, especially TiN and the in-situ formed TiH 2 were the main reasons for improving the hydrogen storage performance of materials.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Yang Guo,Mingyuan Sun,Wenjian Yang,Songyang Yuan,Hui Xiong,Ziyu Tan,Jiandong Fan,Wenzhe Li
Tin-based perovskite has been widely studied due to its green, nontoxic, and excellent photoelectric physical properties. However, the high sensitivity of Sn2+ cations against moisture and oxygen was a huge challenge for preparing stable solar cells. In this study, 4-(aminomethyl) pyridine (4AP) cation is introduced to construct two-dimensional (2D) and Dion–Jacobson (DJ) perovskite 4APSnX4 (X = Cl, Br, I). First, through halogen component regulation, the charge transfer efficiency is improved. Then, it is found that increasing the temperature could build the charge transfer channel through an organic component and further improve the charge transfer efficiency. Finally, we prepared stable quasi-2D tin-based perovskite solar cells with the champion efficiency of 5.03%. We tracked the performance of unencapsulated devices over 200 h in an ambient environment (R.H. = 30%, T = 25 °C) and found no appreciable decay in efficiency. This study provides a new strategy for solving the transmission and stability problem of 2D tin perovskite.
研究领域:
材料科学
·
太阳能技术
·
物理化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）