Nanotechnology最新文献_第4页

Improving the performance of quantum well solar cells with photonic crystal.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-12-19 DOI: 10.1088/1361-6528/ad9d47

Weiye Liu, Jiaping Guo, Ding Ding, Xinhui Tan, Haonan Xu, Lingyu He, Wei Zhang, Lili Han, Zhaowei Wang, Weihua Gong, Jinyun Qi, Xiansheng Tang

{"title":"Improving the performance of quantum well solar cells with photonic crystal.","authors":"Weiye Liu, Jiaping Guo, Ding Ding, Xinhui Tan, Haonan Xu, Lingyu He, Wei Zhang, Lili Han, Zhaowei Wang, Weihua Gong, Jinyun Qi, Xiansheng Tang","doi":"10.1088/1361-6528/ad9d47","DOIUrl":"10.1088/1361-6528/ad9d47","url":null,"abstract":"The fabrication of quantum well solar cells with surface photonic crystal (SPC) and embedded photonic crystal (EPC) structures has resulted in solar cells with improved properties. When compared to reference solar cells (RSCs), the photoluminescence (PL) intensities of SPC solar cells and EPC solar cells have been enhanced by 89% and 114%, respectively. This indicates improved light absorption and emission characteristics in the presence of the periodic patterns (PCs). The short-circuit current (Isc) of EPC solar cells is 31% higher than that of RSCs, suggesting improved light absorption and carrier generation. On the other hand, SPC solar cells exhibit a 6% higher Isc compared to RSCs, and the open-circuit voltage has increased simultaneously. The fill factors (FF) of the solar cells are 84% for RSCs, 86% for SPC solar cells, and 76% for EPC solar cells. The higher FF in SPC solar cells suggests improved charge carrier collection efficiency. In terms of photoelectric conversion efficiency, SPC solar cells demonstrate a 10.6% increase, while EPC solar cells show a 7.7% increase. These improvements indicate that the incorporation of PCs in the solar cells enhances their ability to convert light into electrical energy. These findings highlight the potential of photonic crystals engineering for enhancing the performance of solar cells.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142813707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved performance in 0D/2D mixed dimensional homojunction MoS₂photodetectors by enhancing light absorption.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-12-19 DOI: 10.1088/1361-6528/ad9bb7

Lin Zhang, Peiyu Cheng, Yongqiang Du, Quan Wang

{"title":"Improved performance in 0D/2D mixed dimensional homojunction MoS2photodetectors by enhancing light absorption.","authors":"Lin Zhang, Peiyu Cheng, Yongqiang Du, Quan Wang","doi":"10.1088/1361-6528/ad9bb7","DOIUrl":"10.1088/1361-6528/ad9bb7","url":null,"abstract":"Molybdenum disulfide (MoS2) possesses excellent potential for applications in the field of optoelectronic detection. However, the atomic-level thickness of the monolayer MoS2leads to weak light absorption and a restricted absorption spectrum. The performance of monolayer MoS2devices has reached a bottleneck. Fortunately, the above issues can be effectively solved by coupling with various types of photosensitivity nanostructures. In this work, we integrated MoS2quantum dots (QDs) with high efficient light absorption with monolayer MoS2to fabricate 0D/2D MoS2QDs/MoS2hybrid dimensional homojunction photodetectors. In this structure, MoS2is used as an efficient carrier transport channel, while MoS2QDs act as effective light absorbers to enhance the local electric field around MoS2. The synergistic effect of MoS2QDs and MoS2is utilized to accelerate the migration rate of photogenerated carriers in the structure, and in particular, the highest responsivity of the MoS2QDs/MoS2hybrid device is 27.6 A W-1with the detectivity as high as 2.13 × 1011Jones under 532 nm laser, which is an order of magnitude higher than that of the pristine MoS2devices. The synergistic effect of MoS2QDs with monolayer MoS2is verified by finite-difference time-domain simulation. The results will pave the way for the future development of high-performance MoS2-based photodetectors.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142801292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of nitrogen-doped carbon dot/tin disulfide nanosheet composite electro-catalysts for dye-sensitized solar cells. 用于染料敏化太阳能电池的掺氮碳点/二硫化锡纳米片复合电催化剂的合成。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-12-19 DOI: 10.1088/1361-6528/ad97c4

Lin-Jiun Chen, Cheng-Ju Yu, Prasanta Kumar Sahoo, Yu-Xuan Wang, Yi-Xuan Lin, Chuan-Pei Lee

{"title":"Synthesis of nitrogen-doped carbon dot/tin disulfide nanosheet composite electro-catalysts for dye-sensitized solar cells.","authors":"Lin-Jiun Chen, Cheng-Ju Yu, Prasanta Kumar Sahoo, Yu-Xuan Wang, Yi-Xuan Lin, Chuan-Pei Lee","doi":"10.1088/1361-6528/ad97c4","DOIUrl":"10.1088/1361-6528/ad97c4","url":null,"abstract":"Nitrogen-doped carbon dots (N-CDs) and vertically-grown tin disulfide (SnS2) nanosheets are synthesized via hydrothermal method and chemical vapor deposition technique, respectively. The SnS2nanosheets are directly fabricated on flexible carbon cloth (CC), and then their basal planes are decorated with N-CDs. The as-prepared composite electrodes are used as the counter electrode for the application in dye-sensitized solar cells (DSSCs). The characterizations of N-CDs and SnS2nanosheets are studied by high resolution transmission electron microscopy, scanning electron microscopic, energy dispersive x-ray spectrometer, Raman spectrometer and x-ray photoelectron spectroscopy etc. Moreover, the cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and photocurrent-density voltage are utilized to understand the electro-catalytic performance of N-CDs/SnS2/CC composite counter electrode. The N-CDs/SnS2/CC composite electrode shows higher cathodic reduction current density and lower charge transfer resistance in CV and EIS measurements, respectively, as compared to those of the electrodes with N-CDs or SnS2alone. Meanwhile, the DSSC using N-CDs/SnS2/CC exhibits cell efficiency (η) of 7.68%, which is higher than those of cells having SnS2/CC (η= 7.54%) and N-CDs/CC (η= 5.66%) counter electrodes, respectively; it also reaches 94% cell efficiency of the cell using Pt/CC counter electrode (η= 8.15%). The design concept of the modification of the basal planes by defect-rich carbon dots (i.e. N-CDs) and highly-exposed edge sites (i.e. vertically-grown SnS2nanosheets) makes promising route to enhance the performance of two-dimensional electro-catalysts.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SnSe₂thermal conductivity from optothermal Raman and Stokes/anti-Stokes thermometry.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-12-19 DOI: 10.1088/1361-6528/ad99df

Micah P Vallin, Rijan Karkee, Theresa M Kucinski, Huan Zhao, Han Htoon, Chanho Lee, Ramon M Martinez, Saryu J Fensin, Richard Z Zhang, Michael T Pettes

{"title":"SnSe2thermal conductivity from optothermal Raman and Stokes/anti-Stokes thermometry.","authors":"Micah P Vallin, Rijan Karkee, Theresa M Kucinski, Huan Zhao, Han Htoon, Chanho Lee, Ramon M Martinez, Saryu J Fensin, Richard Z Zhang, Michael T Pettes","doi":"10.1088/1361-6528/ad99df","DOIUrl":"10.1088/1361-6528/ad99df","url":null,"abstract":"The optothermal Raman method is useful in determining the in-plane thermal conductivity of two-dimensional (2D) materials that are either suspended or supported on a substrate. We compare this method with the Stokes/anti-Stokes scattering thermometry method, which can play a role in both calibration of Raman peak positions as well as extraction of the local phonon temperature. This work demonstrates that the Stokes/anti-Stokes intensity ratio plays an important role in determining the in-plane thermal conductivity of 2D tin diselenide (SnSe2) dry-transferred onto a polished copper (Cu) substrate. The statistically-averaged thermal conductivity of the 108 ± 24 nm-thick SnSe2yielded 5.4 ± 3.5 Wm-1K-1for the optothermal Raman method, and 2.40 ± 0.81 Wm-1K-1for the Stokes/anti-Stokes thermometry method, indicating that the Stokes/anti-Stokes thermometry method to calculate the thermal conductivity of a material can simultaneously increase both precision and accuracy. The uncertainty value was also lowered by a factor of 1.9 from the traditional optothermal Raman method to the Stokes/anti-Stokes thermometry method. The low in-plane thermal conductivity of 2D SnSe2, 1.3-2.9 times lower than bulk, is useful for applications in thermal and electrical energy conversion and thermoelectric devices.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142770691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring hydrogen adsorption and release in 2D M₂C-MXenes: structural and functional insights.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-12-19 DOI: 10.1088/1361-6528/ad9bb8

Wenzhen Xu, Liang Sun, Wenyan Zhai, Jia Yang, Tao Jiang, Jianhong Peng

{"title":"Exploring hydrogen adsorption and release in 2D M2C-MXenes: structural and functional insights.","authors":"Wenzhen Xu, Liang Sun, Wenyan Zhai, Jia Yang, Tao Jiang, Jianhong Peng","doi":"10.1088/1361-6528/ad9bb8","DOIUrl":"10.1088/1361-6528/ad9bb8","url":null,"abstract":"Two-dimensional M2C-MXenes, characterized by their lightweight nature, tunable surface structures, and strong affinity for hydrogen, hold significant promise for addressing various challenges in hydrogen energy utilization. This study focuses on investigating the hydrogen adsorption and desorption properties, as well as the stability of hydrogenated compounds in 19 pure M2C-MXenes nanosheets. The results indicate that hydrogen adsorption on M2C primarily occurs through weak physisorption, with Mn2C and Fe2C from the fourth period, and Ag2C and Cd2C from the fifth period exhibiting the lowest adsorption energies. In contrast, hydrogen atoms are adsorbed on M2C primarily through chemisorption, leading to the potential dissociation of H2molecules into two hydrogen atoms. Among the M2C-MXenes, Ti2C, and Zr2C in thed4andd5, respectively, demonstrate the most stable hydrogen atom binding. Hydrogen evolution is most facile on Cu2C and Ag2C surfaces. Two types of stacking configurations, face-centered cubic and hexagonal close-packed, are observed for hydrogenated M2C surfaces (e.g. Co2C and Zr2C), showing excellent thermodynamic stability. This work elucidates the hydrogen utilization performance of pure M2C-MXenes nanosheets and guides future research aimed at achieving high hydrogen storage capacities through the functional tuning of MXenes.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142801234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reactive laser ablation in liquid synthesis of aluminosilicate nanominerals. 反应激光烧蚀在铝硅酸盐纳米矿物液态合成中的应用。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-12-19 DOI: 10.1088/1361-6528/ada160

Chamari Weththasingha, Emily Anne Jackson, Massimo F Bertino, Wei-Ning Wang, Katharine Tibbetts

{"title":"Reactive laser ablation in liquid synthesis of aluminosilicate nanominerals.","authors":"Chamari Weththasingha, Emily Anne Jackson, Massimo F Bertino, Wei-Ning Wang, Katharine Tibbetts","doi":"10.1088/1361-6528/ada160","DOIUrl":"https://doi.org/10.1088/1361-6528/ada160","url":null,"abstract":"Nanoscale aluminosilicate minerals have wide ranging applications in areas including catalysis, environmental remediation, and medicine. This work reports a reactive laser ablation in liquid (RLAL) synthetic route to aluminosilicate nanominerals that enables facile tuning of their elemental composition, crystallinity, and morphology. Both the precursor solution pH and the choice of base used to adjust the pH were found to determine the properties of the nanominerals produced by laser ablation of a silicon target in aqueous solution of aluminum nitrate. Addition of ammonia produced amorphous phases with fiber- or tube-like morphologies and high aluminum content under alkaline conditions. In contrast, the addition of potassium hydroxide produced highly crystalline quasi-spherical particles, with numerous aluminum silicate and potassium aluminum silicate phases. These results show that manipulation of the precursor solution chemistry for RLAL can produce aluminosilicate nanominerals with a wide range of properties, demonstrating the flexibility of RLAL for synthesis of tailored nanominerals for specific applications.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142864908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

E-beam fluorinated CVD graphene:in-situXPS study on stability and NH₃adsorption doping effect.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-12-19 DOI: 10.1088/1361-6528/ad9ab0

V Malesys, T Duan, E Denys, Hu Li, K Leifer, L Simon

引用次数: 0

Flexible solid-state supercapacitors based on biowaste-derived activated carbon and nanomaterials for enhanced performance.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-12-18 DOI: 10.1088/1361-6528/ada0c0

Dilara Koroglu, Haluk Bingol, Betul Uralcan

引用次数: 0

High performance Mg-Li dual metal-ion batteries based on highly pseudocapacitive hierarchical TiO₂-B nanosheet assembled spheres cathodes. 基于高伪电容分层 TiO2-B 纳米片组装球阴极的高性能镁锂双金属离子电池。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-12-17 DOI: 10.1088/1361-6528/ada03a

Mewin Vincent, Venkata Sai Avvaru, Maciej Haranczyk, Vinodkumar Etacheri

{"title":"High performance Mg-Li dual metal-ion batteries based on highly pseudocapacitive hierarchical TiO2-B nanosheet assembled spheres cathodes.","authors":"Mewin Vincent, Venkata Sai Avvaru, Maciej Haranczyk, Vinodkumar Etacheri","doi":"10.1088/1361-6528/ada03a","DOIUrl":"https://doi.org/10.1088/1361-6528/ada03a","url":null,"abstract":"Although Mg-Li dual metal-ion batteries are proposed as a superior system that unite safety of Mg-batteries and performance of Li-ion based systems, its practical implantation is limited due to the lack of reliable high performance cathodes. Herein, we report a high-performance Mg-Li dual metal-ion battery system based on highly pseudocapacitive hierarchical TiO2-B nanosheet assembled spheres (NS) cathode. This 2D cathode displayed exceptional pseudocapacitance (a maximum of 93%) specific capacity (303 mAh/g at 25 mA/g), rate performance (210 mAh/g at 1A/g), consistent cycling (retain ~100% capacity for 3000 cycles at 1A/g), coulombic efficiency (nearly 100%) and fast-charging (~12.1 min). These properties are remarkably dominant to the existing Mg-Li dual metal-ion battery cathodes. Spectroscopic and microscopic mechanistic studies confirmed negligible structural changes during charge-discharge cycles of the TiO2-B nanosheet assembled spheres electrodes. Exceptional electrochemical properties of the 2D electrode is ascribed to remarkable pseudocapacitive Mg-Li dual metal-ion diffusion via the numerous nanointerfaces of TiO2-B caused by its hierarchical microstrucrure. Large surface area, nanosheet morphology, mesoporous structure and ultrathin nature also acted as secondary factors facilitating improved electrode-electrolyte contact. Demonstrated approach of pseudocapacitive type Mg-Li dual metal-ion intercalation through hierarchical nanointerfaces may be further utilized for the designing of numerous top-notch electrode materials for futuristic Mg-Li dual metal-ion batteries&#xD.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142847131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced lithium-ion battery performance with a novel composite anode: S-doped graphene oxide, polypyrrole, and fumed silica.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2024-12-17 DOI: 10.1088/1361-6528/ada039

Mohammed Al-Bujasim, Metin Gençten, Koray Bahadir Bahadır Donmez, Melih Besir Arvas, Nilgun Karatepe, Yucel Sahin

{"title":"Enhanced lithium-ion battery performance with a novel composite anode: S-doped graphene oxide, polypyrrole, and fumed silica.","authors":"Mohammed Al-Bujasim, Metin Gençten, Koray Bahadir Bahadır Donmez, Melih Besir Arvas, Nilgun Karatepe, Yucel Sahin","doi":"10.1088/1361-6528/ada039","DOIUrl":"https://doi.org/10.1088/1361-6528/ada039","url":null,"abstract":"In this work, a novel composite anode material was developed, utilizing S-doped graphene oxide (SGO), polypyrrole (PPy), and fumed silica to enhance the performance of lithium-ion batteries (LIBs). The chronoamperometric approach was used to produce SGO, while the chemical method was employed to synthesize PPy. A composite of SGO, PPy, and fumed silica was prepared as an anode for a half-cell, using two samples: one with a high PPy ratio (S1) and the other with a low PPy ratio (S2) and compared the results with bare sample (S0). The S1 sample exhibited a good initial discharge capacity (648 mAh/g), with capacities of 207 and 131 mAh/g at 5C and 10C, respectively. S1 and S2 also demonstrated superior cycling stability at a high current (100 cycles at 10C), with a retention capacity of 99 and 87%, respectively compared with S0 which retained only 68%. Coin-type full cells with S1 as the anode and LiFePO4 (LFP) as the cathode were assembled and compared with commercial graphite anodes. The S1 full cell showed a high reversible capacity (164 mAh/g at 0.1C), with a capacity retention of 66% after 100 cycles at 10C. At the same time, the graphite anode exhibited a reversible capacity of 133 mAh/g at 0.1C, with a capacity retention of 58% after 100 cycles at 10C. The S1 full cell achieved a gravimetric energy density of 164 W h/kg at 0.1C and 49 W h/kg at 10C, which is 25% greater than that of the graphite full cell (39 W h/kg) at 10C. These distinguishing characteristics of S1 make it a viable substitute for graphite as a high-performance anode material in LIBs, opening the possibility for devices with reliable battery systems.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142847130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0