Small
·
2021
·Vol. 17
·期 28
·2101403
·
IF 13.281
Qiqian He,Gaoyu Chen,Yongkai Wang,Xiaoyu Liu,Danting Xu,Xiangxing Xu,Ying Liu,Jianchun Bao,Xun Wang
All-Inorganic perovskite CsPbX 3 (X = Cl, Br, I) quantum dots (QDs) have attracted tremendous attention in the past few years for their appealing performance in optoelectronic applications. Major properties of CsPbX 3 QDs include the positive photoconductivity (PPC) and the defect tolerance of the in-band trap states. Here it is reported that when hybridizing CsPbX 3 QDs with indium tin oxide (ITO) nanocrystals to form CsPbX 3 -ITO nano-heterojunctions (NHJs), a voltage tuned photoresponse—from PPC to negative photoconductivity (NPC) transform—is achieved in lateral drain-source structured ITO/CsPbX 3 -ITO-NHJs/ITO devices. A model combining exciton, charge separation, transport, and most critical the voltage driven electron filling of the in-band trap states with drain–source voltage ( V DS ) above a threshold, is proposed to understand this unusual PPC-NPC transform mechanism, which is different from that of any known nanomaterial system. This finding exhibits potentials for developing devices such as photodetectors, optoelectronic switches, and memories.
研究领域:
材料科学
·
光电子学
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DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2012
·
IF 7.286
Chunhui Duan,Chengmei Zhong,Chunchen Liu,Fei Huang,Yong Cao
A phosphate group-containing bisadducts fullerene derivative bis-[6,6]-phenyl-C60-pentyl phosphoric diethyl ester (B-PCPO) has been developed as an indium tin oxide (ITO) interlayer material in inverted polymer solar cells. The B-PCPO possessed good alcohol solubility, n-type nature, good electron transporting ability, and ITO modification function simultaneously, and it was utilized as an ITO interlayer in solution-processed multilayer inverted bulk-heterojunction polymer solar cells to improve the electron transporting and collection. It was found that the B-PCPO interlayer could effectively decrease the work function of ITO and thereby enhance the electron collection of ITO electrode. The device studies showed that the resulting solar cells' efficiencies were significantly increased from 4.83% to 6.20% by using a B-PCPO interlayer, benefiting from the dramatic enhancement in open circuit voltage and moderate increase in fill factor. Our results provide a promising approach to improve the performance of inverted polymer solar cells.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yingying Wang,Jianyun Zhang,Xinglong Zhang,Yingxuan Liu,Xiaoshan Huang,Zhaolei Ba,Naiqiang Yin,Jing Yu,Chundong Liu
The detection of trace thiram is critically important due to its environmental persistence and biotoxicity. Conventional pesticide residue analysis faces fundamental limitations in sensitivity and accuracy due to low analyte recovery efficiency during sampling, making surface-enhanced Raman spectroscopy an ideal solution for trace thiram monitoring. In this study, we developed a high-performance SERS substrate based on in-situ synthesized silver nanoparticle-decorated indium tin oxide (AgNPs/ITO) glass, fabricated via cyclic voltammetry electrochemical deposition. The substrate demonstrated exceptional sensitivity for standard probe molecules such as R6G, achieving an enhancement factor (EF) of up to 8.62 × 10 6 with excellent signal uniformity and universality. For pesticide detection, the substrate exhibited a remarkably low LOD of 0.55 μg/L for thiram and enabled effective in-situ identification of thiram residues on vegetable leaf surfaces, demonstrating robust capability for practical pesticide residue analysis.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2017
·
IF 4.95
Suyan Zhai,Chen Fang,Jilin Yan,Qun Zhao,Yifeng Tu
The variation of I27L gene closely relates to increasing risk of type 2 diabetes, thus it is greatly significant to develop various methods for its identification or monitoring. We report here a novel label-free electrochemiluminescent (ECL) biosensor for simple and effective determination of I27L gene based on Au nanoparticles functionalized ITO electrode. The ECL technique is employed to monitor the hybridization of DNA strands by measuring the changes of its intensity. Here, the ECL signal was quenched by blocked access of probe (luminol anion) owing to the electrostatic repulsion of negatively charged sensor surface and the space resistance. The quantification of target strand can be directly realized by calibrating the quenched ECL signal toward its logarithm concentration in good linearity within the range from 1.0 × 10 −11 to 1.0 × 10 −7 M and a detection limit of 8.1 × 10 −12 M. In addition, the biosensor exhibited good stability, excellent reproducibility and outstanding selectivity against one-base mismatched strand. What's more, the simple, low-cost, sensitive device could be easily miniaturized, makes it as an attractive candidate for integrating into portable platforms for point-of-care molecular diagnostics.
研究领域:
生物技术
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医学诊断
·
纳米科技
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2015
·
IF 3.827
Hongwei Lei,Pingli Qin,Weijun Ke,Yaxiong Guo,Xin Dai,Zhao Chen,Haoning Wang,Borui Li,Qiao Zheng,Guojia Fang
In this paper, a thin layer of high work function CuS was introduced to the interface between the anode and hole transporting layer (HTL) to modify the indium tin oxide (ITO) anode. Modified ITO substrates possess a higher work function, a lower sheet resistance and a negligible loss in transparency. More importantly, a thin layer of CuS can also benefit for the hole transporting of the device. Polymer solar cells (PSCs) utilizing modified ITO anodes exhibit a significant enhancement in power conversion efficiency ( PCE ) and air stability compared to devices with normal ITO anodes. This anode modification strategy applies to different active layer systems. Anode-modified devices with poly (3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PC 61 BM) as the active layer exhibit a PCE of 3.5%, while poly(4,8-bis(5-(2-ethyl-hexyl)-thiophene-2-yl)-benzo[l,2-b:4,5-b′] dithiophene-alt-alkylcarbonyl-thieno[3,4-b]thiophene) (PBDTTT-C-T) and [6,6]-phenyl-C71-butyric acid methyl ester (PC 71 BM) system shows a PCE of 7.4%. As a result, this work provides a good compatibility for modification of ITO by a thin layer of CuS in PSCs to achieve better performance.
研究领域:
材料科学
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光伏技术
·
有机电子学
·
纳米材料
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 8
·1154
·
IF 4.034
Wen Yang,Jing Yu,Xiangtai Xi,Yang Sun,Yiming Shen,Weiwei Yue,Chao Zhang,Shouzhen Jiang
In this paper, a graphene/ITO nanorod metamaterial/U-bent-annealing (Gr/ITO-NM/U-bent-A)-based U-bent optical fiber local surface plasmon resonance (LSPR) sensor is presented and demonstrated for DNA detection. The proposed sensor, compared with other conventional sensors, exhibits higher sensitivity, lower cost, as well as better biological affinity and oxidize resistance. Besides, it has a structure of an original Indium Tin Oxides (ITO) nanocolumn array coated with graphene, allowing the sensor to exert significant bulk plasmon resonance effect. Moreover, for its discontinuous structure, a larger specific surface area is created to accommodate more biomolecules, thus maximizing the biological properties. The fabricated sensors exhibit great performance (690.7 nm/RIU) in alcohol solution testing. Furthermore, it also exhibits an excellent linear response (R2= 0.998) to the target DNA with respective concentrations from 0.1 to 100 nM suggesting the promising medical applications of such sensors.Keywords:localized surface plasmon resonance biosensor;U-bent fiber;ITO metamaterials;high sensitivity;specificity deteection
研究领域:
光学传感
·
生物传感器
·
纳米材料
·
分子检测
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 40
·19584-19589
·
IF 9.931
Zijie Xu,Weifeng Li,Jiani Huang,Qian Liu,Xing Guo,Wenxi Guo,Xiangyang Liu
Electrochromic devices (ECDs) presenting reversible color variation are considered as the most promising alternative to traditional smart windows. However, the fabrication of large-scale ECDs with high flexibility and stability is still challenging. In this work, we present a crackle pattern technology for controllable and large-scale fabrication of rectangular Ag network films for indium tin oxide-free (ITO-free) flexible ECDs. This rectangular Ag film exhibits superior mechanical robustness and controllable optoelectronic performance (2.0 Ω sq−1 at 91% transmittance). In the application of WO3 based ECD, the rectangular film presents an ultrafast switching time (0.25/0.18 s for bleaching/coloring) and is thus applicable in flexible displays. Moreover, this device demonstrates a large optical modulation of 76% at 630 nm and sustains 78.9% of its initial modulation even after 20 000 cycles, which is close to the commercial standard for rigid ECDs. The obtained rectangular Ag films are successfully assembled into a flexible all-solid-state ECD (21 × 13 cm2), which can be utilized in smart windows, glasses and other fields that require bending or cutting.
研究领域:
材料科学
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纳米技术
·
电子工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Weixin Zhou,Jun Chen,Yi Li,Danbei Wang,Jianyu Chen,Xiaomiao Feng,Zhendong Huang,Ruiqing Liu,Xiujing Lin,Hongmei Zhang,Baoxiu Mi,Yanwen Ma
Metal mesh is a significant candidate of flexible transparent electrodes to substitute the current state-of-the-art material indium tin oxide (ITO) for future flexible electronics. However, there remains a challenge to fabricate metal mesh with order patterns by a bottom-up approach. In this work, high-quality Cu mesh transparent electrodes with ordered pore arrays are prepared by using breath-figure polymer films as template. The optimal Cu mesh films present a sheet resistance of 28.7 Ω·sq–1 at a transparency of 83.5%. The work function of Cu mesh electrode is tuned from 4.6 to 5.1 eV by Ag deposition and the following short-time UV–ozone treatment, matching well with the PEDOT:PSS (5.2 eV) hole extraction layer. The modified Cu mesh electrodes show remarkable potential as a substitute of ITO/PET in the flexible OPV and OLED devices. The OPV cells constructed on our Cu mesh electrodes present a similar power conversion efficiency of 2.04% as those on ITO/PET electrodes. The flexible OLED prototype devices can achieve a brightness of 10 000 cd at an operation voltage of 8 V.
研究领域:
材料科学
·
电子工程
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DOI
PubMed
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Maolin Mu,Wen Li,Lunyao Pan,Xiankan Zeng,Qungui Wang,Yongjian Chen,Chenglong Li,Di Shen,Xinning Wang,Shiyu Yang,Hongqiang Xin,Weiqing Yang
Achieving balanced charge injection and transport in perovskite light-emitting diodes (PeLEDs) remains challenging due to the large energy level offset between the indium tin oxide (ITO) electrode and the hole transport layer, coupled with an unsatisfactory hole injection capability. Given that Cu 2 ZnSnS 4 (CZTS) offers a deep valence band maximum, high hole mobility, high stability, and cost-effectiveness. Here, CZTS is introduced as a hole injection layer between the ITO and poly(9-vinylcarbazole) (PVK) layers to align energy level and increase hole injection capacity. The huge difference between CZTS and PVK work functions creates a robust interfacial electric field, resulting in an interfacial dipole effect, which significantly enhancing hole injection and boosting the carrier radiative recombination efficiency. Meanwhile, the robust CZTS/PVK interface favors high-quality FAPbBr 3 films with good morphology and reduced defects. The resulting optimized PeLEDs with a peak emission wavelength of 529 nm achieve an external quantum efficiency (EQE) of 15.44%, a turn-on voltage of 3 V and current efficiency (CE) of 75.3 cd A −1 , significantly outperforming the control devices, which exhibit an EQE of 7.55%, a turn-on voltage of 3.4 V and CE of 35.4 cd A −1 . This study provides novel insights into constructing efficient PeLEDs through enhanced hole injection using CZTS.
研究领域:
材料科学
·
光电子学
·
固体物理
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Junying Peng,Shengjie Lu,Nan Su,Wenbei Situ,Xianliang Song
Caffeine, a central nervous system stimulant ubiquitously present in many plants such as coffee and tea, is conventionally quantified using chromatographic and electrophoretic techniques. Despite the advantages of rapid response, simple instrumentation, and low cost, photoelectrochemical (PEC) sensing remains underdeveloped for caffeine analysis. In this study, a novel PEC sensor was constructed by integrating BiVO 4 nanoparticles with Co-TCPP MOF on ITO (BiVO 4 /Co-TCPP MOF/ITO), with the aim of caffeine detection. A series of structural, morphological, optical and photoelectrochemical analyses were conducted on the BiVO 4 /Co-TCPP MOF/ITO electrode. The results demonstrated that the incorporation of Co-TCPP MOF significantly enhanced the photoelectrochemical performance of the material attributable to their extensive π-conjugated system, achieving a photocurrent density of 2.01 mA/cm 2 at 0.6 V (vs. Ag/AgCl), approximately 3.3-fold higher than pristine BiVO 4 (0.59 mA/cm 2 ). After optimization of key parameters including Co-TCPP MOF dosage, electrolyte, applied bias, the sensor exhibited a robust linear response to caffeine in the range of 0.5–120 μM, with a detection limit of 0.12 μM. Moreover, it displayed excellent selectivity, reproducibility (RSD < 3.5%), and long-term operational stability. Application to real tea and coffee samples achieved satisfactory recoveries (95.8–103.2%), with results consistent with HPLC-MS/MS, confirming its reliability. This work provides an efficient PEC caffeine sensing platform and new insights for designing MOF-semiconductor hybrids for advanced optoelectronic sensing.
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DOI
高影响因子
Small
·
2026
·
IF 11.8
Yutian Wang,Yufei Li,Letu Siqin,Ruijian Liu,Hongmei Luan,Chengjun Zhu
Excessive back interface interdiffusion and absorber defects are the primary limitations to the performance of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells. In this study, we address these limiting factors by introducing an ITO interlayer at the back interface. During the initial stage of selenization, the ITO functions as a diffusion barrier, effectively suppressing the migration of metal elements toward the Mo electrode and thereby mitigating elemental loss. In the middle and final stages of selenization, the ITO acts as a self-sacrificing layer, supplying Sn and In elements to compensate for the absorber layer. The dual-functional ITO interlayer facilitates the redistribution of elemental composition within the absorber layer. It reduces Sn-related vacancy defects through supplemental Sn supply and alleviates Sn-related substitutional defects via trace In doping. Through the optimization in this work, the defects in the absorber layer were effectively reduced. The reverse saturation current density decreased from 4.14 × 10 −7 to 2.67 × 10 −8 A/cm 2 , indicating effective suppression of carrier recombination. Finally, the ITO-10 sample achieved a photoelectric conversion efficiency of 13.11%. This work presents a new interlayer material that reveals the synergistic mechanism of bulk doping and defect regulation in transparent conductive oxide ITO for CZTSSe.
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DOI
PubMed
高影响因子
Science China-Materials
·
2026
·Vol. 69
·期 3
·1677-1690
·
IF 7.7
Liu Tong,Han Litao,Pei Lunan,Zhong Xinyi,Yang Wentong,Leng Kelin,Zeng Qiang,Kou Dongxing,Zhou Zhengji,Liu Fangyang,Wu Sixin
Kesterite Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells suffer from significant open-circuit voltage ( V OC ) deficits due to severe interfacial and bulk recombination, restricting their power conversion efficiency (PCE) far below the Shockley-Queisser limit. This work proposes a low-temperature annealing strategy during ITO sputtering (SA) to synergistically address these challenges. The temperature applied during ITO sputtering not only improves the crystallinity, carrier concentration, and optical transmittance of the ITO layer but also promotes the diffusion of In from ITO into both CdS and CZTSSe layers. Consequently, lattice matching at the CZTSSe/CdS interface is optimized, enabling epitaxial growth. And a favorable ITO/In:CdS/In&Cd:CZTSSe structure with optimal band alignment is obtained. As a result, a champion device with a PCE of 14.29% was achieved. The SA-treating also enabled the CZTSSe solar cells to achieve the highest V OC reported to date, exceeding 590 mV. This underscores the essential role of SA processing in optimizing interface engineering and suppressing defects, thus promoting the development of low-cost, high-performance kesterite photovoltaics.
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高影响因子
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