Solid State Sciences最新文献

Efficient photocatalytic elimination of antibiotics over metal-free CNx/PANI/graphene sponge system 无金属CNx/聚苯胺/石墨烯海绵系统的高效光催化消除抗生素

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2024-11-29 DOI: 10.1016/j.solidstatesciences.2024.107781

Beibei Zhu , Jie Zhou , Lubin Ni , Guowang Diao

Purification of antibiotic wastewater has been recognized as one of the most important issues in the environmental community, for which, developing the metal-free photocatalyst system is an environment-friendly and economic-feasible way. Herein, we designed the metal-free C₃N_x/PANI photocatalyst wrapped around the graphene sponge (CPG) for coupled antibiotic wastewater adsorption and purification. The properties of CPG and their relation with purification performance were investigated using various characterization techniques and photocatalysis evaluation. As a result, we found that the advanced porous structure of graphene sponge can favor wastewater adsorption and photon utilization efficiency due to the crosslink channels with a higher crosslinking density. Meanwhile, the layered structure of CN_x effectively facilitates the transfer of charge carriers while the PANI exhibits high-capacity visible light adsorption. Consequently, after optimization, CPG8 exhibited better photocatalytic activity with a sulfamethazine degradability of 10 mg/L within 40 min. The novel approach and new insights obtained in this work give important guidance for designing advanced photocatalytic systems used in wastewater purification.

抗生素废水的净化已成为环保界公认的重要问题之一，开发无金属光催化剂体系是一种既环保又经济可行的方法。本文设计了一种包裹在石墨烯海绵（CPG）表面的无金属C3Nx/PANI光催化剂，用于抗生素废水的耦合吸附和净化。利用各种表征技术和光催化评价研究了CPG的性质及其与净化性能的关系。因此，我们发现石墨烯海绵的先进多孔结构由于具有更高交联密度的交联通道，有利于废水吸附和光子利用效率。同时，CNx的层状结构有效地促进了载流子的转移，而PANI则表现出高容量的可见光吸附。因此，优化后的CPG8表现出更好的光催化活性，在40 min内磺胺乙胺的降解率为10 mg/L。本研究获得的新方法和新见解为设计用于废水净化的先进光催化系统提供了重要指导。

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引用次数: 0

Additives in silver paste improve the mechanical and thermal stability of thermoelectric modules composed of n-type half-Heusler and p-type oxide materials 银浆中的添加剂提高了n型半heusler和p型氧化物材料组成的热电模块的机械稳定性和热稳定性

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2024-11-29 DOI: 10.1016/j.solidstatesciences.2024.107780

Ryoji Funahashi , Yoko Matsumura , Hiroyo Murakami , Tomoyuki Urata , Hitomi Ikenishi , Takashi Sekine

Thermoelectric modules composed of n-type half-Heusler (HH: Ti_0.75Hf_0.25NiSn) and p-type oxide (OX: Ca_2.7Bi_0.3Co₄O₉) materials have been prepared using silver (Ag)-based pastes to form junctions. The maximum power output P_max of the modules depends on the ratio of the cross-sectional area between the HH and the OX materials because of their different electrical and thermal conduction properties. The highest P_max value is obtained 1.7 W for the 16 n- and p-type thermoelectric pairs at the cross-sectional area ratio of n:p = 2:5. The maximum conversion efficiency η _max is 1.1 % at about 500 K of the temperature difference between the hot and the cold sides of the module. Single-junction thermoelectric devices composed of either HH or OX materials and Ag sheet electrodes were prepared using the Ag paste mixed with silver oxide (Ag₂O) or OX (same composition as the p-type material) powders, respectively, to compare the electrical resistance and joining strength. The additives in the Ag paste affected the electrical contact resistance and the joining strength at the junction between the thermoelectric materials and the Ag sheets. The increase in electrical contact resistance due to thermal shock was suppressed by the additives for both n- and p-type devices. Although the addition of Ag₂O powder enhanced the joining strength between the HH material and the Ag sheet before thermal shock, this effect is not clear after thermal shock. Moreover, the additives improve the thermal durability of the HH/OX module against the hot-side temperature above 673 K. The degradation of the module is related to the electrical contact resistance at the junctions.

利用银（Ag）基浆料形成结，制备了n型半heusler （HH: Ti0.75Hf0.25NiSn）和p型氧化物（OX: Ca2.7Bi0.3Co4O9）材料组成的热电模块。模块的最大功率输出Pmax取决于HH和OX材料之间的横截面积之比，因为它们的电学和热传导特性不同。当截面积比为n:p = 2:5时，16对n型和p型热电偶的Pmax值最大，为1.7 W。在模组冷热侧温差约500 K时，最大转换效率η max为1.1%。将银浆料分别与氧化银（Ag2O）或氧化银（与p型材料成分相同）粉末混合，制备由HH或OX材料和Ag片电极组成的单结热电器件，比较其电阻和连接强度。银浆中添加的添加剂影响了热电材料与银片的接触电阻和连接强度。对于n型和p型器件，添加剂抑制了由于热冲击引起的电接触电阻的增加。虽然在热冲击前，Ag2O粉末的加入增强了HH材料与Ag片材之间的连接强度，但在热冲击后，这种效果并不明显。此外，添加剂提高了HH/OX模块在热侧温度高于673 K时的热耐久性。模块的退化与结点处的电接触电阻有关。

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引用次数: 0

Improving the efficiency of polymer solar cells based on chitosan@PVA@rGO composites via gamma-irradiated treatment of rGO nanoparticles 通过伽马辐照处理氧化石墨烯纳米粒子，提高chitosan@PVA@氧化石墨烯复合材料聚合物太阳能电池的效率

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2024-11-27 DOI: 10.1016/j.solidstatesciences.2024.107773

M.A. Sebak , A.K. Aladim , M.M. Mostafa , M. Abdelhamid Shahat

Polymer solar cells (PSCs) are growing as attractive contenders for renewable energy technologies given their low cost, adaptability, and environmental sustainability, rendering them valuable in combating climate change. Interestingly, this work investigates the augmentation of photon absorption and overall efficiency in low-cost, effective active layers (ALs) via gamma irradiation treatment, thereby raising the number of active absorption sites. For the first time, novel Chitosan@PVA@rGO (CPG) composite sheets were created as AL materials and treated to varied dosages of in-situ gamma irradiation (0, 10, 20, 30, and 40 KGy) to optimize their microstructural and physicochemical characteristics. The processed ALs were subjected to comprehensive tests, which included J–V variable evaluation as well as evaluations of microstructure, porosity, morphology, contact angle, optical characteristics, and electrochemical impedance spectroscopy (EIS). The findings reveal that the composites' surface properties got better gradually as gamma irradiation dosages grew; peak performance was reached at 30 KGy (75.9 % apparent porosity and roughness parameter Ra = 6.22 μm). Extended gamma irradiation resulted in increased DSSC efficiency, which reached 6.85 % after 10 KGy and 7.63 % after 20 KGy. High-energy gamma photons boosted mobility and decreased resistive limits by reducing carrier recombination and facilitating charge carrier movement inside CPG compounds. This increased the longevity and charge transfer efficiency of the solar cell. After 30 KGy alteration, the CPG AL's optimized efficiency of 8.78 % and J_sc of 20.23 mA/cm² indicate a 44.3 % improvement in efficacy over the pristine material. The insertion of oxygen-enriched free radicals into the CPG structure is responsible for the improvement in photovoltaic efficiency because it creates continuous pathways for fast electron transport. This work provides an innovative perspective on the use of heteroatom-doped ALs in PSCs by highlighting the benefits of co-doping and regulated heteroatom species.

聚合物太阳能电池（PSCs）由于其低成本、适应性和环境可持续性，在应对气候变化方面具有重要价值，正日益成为可再生能源技术的有力竞争者。有趣的是，这项工作研究了通过伽马辐照处理增加低成本、有效活性层（ALs）的光子吸收和整体效率，从而增加活性吸收位点的数量。本文首次制备了新型Chitosan@PVA@rGO （CPG）复合材料片材作为AL材料，并对其进行了不同剂量的原位γ辐照（0、10、20、30和40 KGy）处理，以优化其微观结构和理化特性。通过J-V变量评价、微观结构评价、孔隙度评价、形貌评价、接触角评价、光学特性评价和电化学阻抗谱（EIS）评价，对制备的铝酸盐进行了综合测试。结果表明：随着辐照剂量的增加，复合材料的表面性能逐渐变好；在30 KGy（75.9%表观孔隙率，粗糙度参数Ra = 6.22 μm）时达到峰值。延长伽玛辐射可提高DSSC效率，在10 KGy后达到6.85%，在20 KGy后达到7.63%。高能伽马光子通过减少载流子重组和促进电荷载流子在CPG化合物内的运动来提高迁移率和降低电阻极限。这增加了太阳能电池的寿命和电荷转移效率。经过30 KGy的改变，CPG AL的效率为8.78%，Jsc为20.23 mA/cm2，比原始材料的效率提高了44.3%。富氧自由基插入CPG结构是提高光伏效率的原因，因为它为快速电子传递创造了连续的途径。这项工作通过强调共掺杂和调控杂原子物种的好处，为在psc中使用杂原子掺杂ALs提供了一个创新的视角。

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引用次数: 0

H2O2-assisted Bi3NbO7 loaded on porous carbon for enhancing the photocatalytic degradation of tetracycline 多孔碳上负载的 H2O2- 辅助 Bi3NbO7 可提高四环素的光催化降解能力

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2024-11-19 DOI: 10.1016/j.solidstatesciences.2024.107763

Yao Wang , Pengzhan Zhang , Fan Li , Liang Zhang , Bing Xu , Kangkang Wang , Zhixian He , Yuyan Sun , Shengnan Zhang

Bi₃NbO₇ loaded on porous carbon (BNO/PC) composite materials has been prepared by the in-suit sol-gel method. The photocatalytic efficacy of the BNO/PC composite has been evaluated by degrading tetracycline (TC) in an environment of visible light and hydrogen peroxide. Moreover, the relevant influencing factors of TC degradation efficiency have been explored through a series of condition optimization experiments. UV–vis DRS and PL tests showed that the loading on porous carbon significantly broadens the visible light response range of the catalyst and improves the separation efficiency of photogenerated carriers. Compared with the bare BNO, the specific surface area and average pore diameter of the BNO/PC composite material increased greatly. The optimal sample of 35 % BNO/PC exhibited outstanding visible light response ability and excellent charge separation efficiency. The “cata + H₂O₂+vis” system had the highest photocatalytic activity, with TC degradation reaching 86.9 % after 60 min of visible light illumination. The addition of hydrogen peroxide (H₂O₂) promoted the formation of more powerful active substances. Following this, a mechanism for photocatalytic degradation has been proposed.

采用内服溶胶-凝胶法制备了负载在多孔碳上的 Bi3NbO7（BNO/PC）复合材料。通过在可见光和过氧化氢环境下降解四环素（TC），评估了 BNO/PC 复合材料的光催化功效。此外，还通过一系列条件优化实验探讨了四环素降解效率的相关影响因素。UV-vis DRS 和 PL 测试表明，多孔碳的负载显著拓宽了催化剂的可见光响应范围，提高了光生载流子的分离效率。与裸 BNO 相比，BNO/PC 复合材料的比表面积和平均孔径都大大增加。BNO/PC 含量为 35% 的最佳样品具有突出的可见光响应能力和优异的电荷分离效率。cata + H2O2 +vis "体系的光催化活性最高，在可见光照射 60 分钟后，TC 降解率达到 86.9%。过氧化氢（H2O2）的加入促进了更强活性物质的形成。据此，提出了一种光催化降解机制。

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引用次数: 0

Investigation of structural, magnetic, optical and dielectric characteristics of Al-doped MgFe2O4 nanoparticles 掺铝MgFe2O4纳米颗粒的结构、磁性、光学和介电特性研究

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2024-11-19 DOI: 10.1016/j.solidstatesciences.2024.107761

R. Srimathi , N.V.S.S.Seshagiri Rao , A. Merlin , R. Kiruthika , A. Selvaraj , Omar H. Abdelkader , Chandra Sekhar Dash , S. Revathi , Anis Ahamed , Jothi Ramalingam Rajabathar , M. Sundararajan , S. Yuvaraj , L. Rajadurai

In this study, MgAlₓFe₂₋ₓO₄ (0 ≤ x ≤ 0.5) nanoparticles were synthesized via the combustion method to investigate the structural, magnetic, optical, and dielectric effects of Al doping on MgFe₂O₄ ferrite. X-ray diffraction (XRD) analysis confirmed the successful formation of the MgFe₂O₄ crystalline phase, with crystallite sizes ranging from 34 to 45 nm. Field emission scanning electron microscopy (FE-SEM) revealed a spherical morphology, and energy-dispersive X-ray spectroscopy (EDX) confirmed the presence of magnesium, iron, oxygen, and the introduced aluminum. Diffuse reflectance spectroscopy measured an optical band gap between 2.03 and 2.13 eV, indicating Al's influence on electronic properties. Dielectric measurements showed that the Al-doped samples exhibited enhanced dielectric constants and AC conductivity compared to the undoped ferrite, making them promising candidates for optoelectronic, photocatalytic, and energy storage applications. These results highlight the potential of Al-doped MgFe₂O₄ nanoparticles in advancing functional materials for data storage and energy-related technologies.

本研究通过燃烧法制备了MgAlₓFe₂₄ₓO₄（0≤x≤0.5）纳米颗粒，研究了Al掺杂对MgFe₂O₄铁氧体的结构、磁性、光学和介电效应。x射线衍射（XRD）分析证实MgFe₂O₄晶相成功形成，晶粒尺寸在34 ~ 45 nm之间。场发射扫描电镜（FE-SEM）显示出球形形貌，能量色散x射线光谱（EDX）证实了镁、铁、氧和引入铝的存在。漫反射光谱测量到的光学带隙在2.03 ~ 2.13 eV之间，表明Al对电子性质的影响。电介质测量表明，与未掺杂的铁氧体相比，al掺杂样品具有更高的介电常数和交流电导率，使其成为光电子，光催化和储能应用的有希望的候选者。这些结果突出了al掺杂MgFe₂O₄纳米颗粒在推进数据存储和能源相关技术的功能材料方面的潜力。

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引用次数: 0

Synthesis and characterization of WO3-GO nanocomposite for hydrogen storage, electrochemical, antibacterial and anticancer applications 用于储氢、电化学、抗菌和抗癌的 WO3-GO 纳米复合材料的合成与表征

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2024-11-19 DOI: 10.1016/j.solidstatesciences.2024.107764

M. Muniyalakshmi , C. Anantha Prabhu , D. Thilaga Sundari , R. Sarika , D. Silambarasan , V. Prasanna Venkatesh

Tungsten trioxide nanoparticles (WO₃ NPs), Graphene oxide nanosheets (GO NSs), and WO₃-GO (50 mg and 100 mg) nanocomposites (NCs) were successfully synthesized by using precipitation, modified Hummer's and ultrasonication methods, respectively. Various characterization techniques were used to confirm the formation of individual and composite materials. Hydrogen storage, electrochemical, antibacterial and anticancer properties of the synthesized materials were studied. Formation of the composite was confirmed by XRD, Raman and XPS analyses. Surface area and pore size distribution of WO₃ NPs and WO₃-GO NC were studied by using BET analysis. Hydrogen storage capacity of WO₃-GO 50 mg and WO₃-GO100 mg NCs was found to be 1.05 and 2.08 wt%, respectively. XRD, Raman, elemental and TG analyses were used to examine the adsorption and desorption of hydrogen. WO₃-GO NCs showed higher specific capacitance as compared to WO₃ NPs. Antibacterial activity against E. coli, S. aureus bacteria and anticancer effect against human breast cancer cells of WO₃ NPs and WO₃-GO NC were examined. Based on the studies, it is evident that the inclusion of GO enhanced the hydrogen storage, specific capacitance, antibacterial and anticancer activities of the composite.

采用沉淀法、改良悍马法和超声法分别成功合成了三氧化钨纳米颗粒（WO3 NPs）、氧化石墨烯纳米片（GO NSs）和 WO3-GO （50 毫克和 100 毫克）纳米复合材料（NCs）。利用各种表征技术确认了单个材料和复合材料的形成。研究了合成材料的储氢、电化学、抗菌和抗癌性能。X射线衍射、拉曼和 XPS 分析证实了复合材料的形成。利用 BET 分析法研究了 WO3 NPs 和 WO3-GO NC 的表面积和孔径分布。发现 WO3-GO 50 mg 和 WO3-GO100 mg NCs 的储氢能力分别为 1.05 和 2.08 wt%。XRD、拉曼、元素和 TG 分析被用来研究氢的吸附和解吸。与 WO3 NPs 相比，WO3-GO NCs 显示出更高的比电容。研究还考察了 WO3 NPs 和 WO3-GO NC 对大肠杆菌和金黄色葡萄球菌的抗菌活性以及对人类乳腺癌细胞的抗癌效果。研究结果表明，GO 的加入增强了复合材料的储氢、比电容、抗菌和抗癌活性。

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引用次数: 0

Self-assembly of Cucurbit[6]uril-Silicotungstic acid and adsorption properties for cationic dyes 葫芦[6]脲-硅钨酸的自组装及其对阳离子染料的吸附特性

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2024-11-17 DOI: 10.1016/j.solidstatesciences.2024.107760

Liling Zeng, Xianyan Ao, Manli Xu, Yunqian Zhang, Zhu Tao

The development of environmentally friendly adsorbents with low cost and high selectivity is often more able to meet the needs of practical applications. In this study, a novel adsorbent Q[6]-STA capable of rapidly and effectively adsorbing cationic dyes was prepared by self-assembly of cucurbit[6]uril (Q[6]) and silicotungstic acid (STA). Q[6]-STA assembly has good thermal stability and significantly improved specific surface area and porosity. The adsorption capacities of Q[6]-STA for crystal violet (CV), malachite green (MG) and methylene blue (MB) are 475.59, 351.98 and 238.16 mg/g, respectively. The efficient adsorption performance for cation dyes is attributed to the high electronegativity of Q[6]-STA surface. This also makes the adsorbent exhibit high selectivity for cationic dyes in anionic/cationic mixed dyes. Thermodynamic analysis shows that the adsorption procedure of Q[6]-STA is unprompted and endothermal. Electrostatic interaction and π-π conjugation effect are possible adsorption driving forces. In the regeneration experiment, the adsorbent is easy to be separated and desorbed, can be recycled, and has good stability.

开发低成本、高选择性的环保型吸附剂往往更能满足实际应用的需要。本研究通过葫芦[6]脲（Q[6]）和硅钨酸（STA）的自组装制备了一种能够快速有效吸附阳离子染料的新型吸附剂 Q[6]-STA。Q[6]-STA 组装具有良好的热稳定性，比表面积和孔隙率显著提高。Q[6]-STA 对结晶紫（CV）、孔雀石绿（MG）和亚甲基蓝（MB）的吸附容量分别为 475.59、351.98 和 238.16 mg/g。阳离子染料的高效吸附性能得益于 Q[6]-STA 表面的高电负性。这也使得该吸附剂对阴离子/阳离子混合染料中的阳离子染料具有较高的选择性。热力学分析表明，Q[6]-STA 的吸附过程是非催化和内热的。静电作用和 π-π 共轭效应是可能的吸附驱动力。在再生实验中，吸附剂易于分离和解吸，可以循环使用，稳定性好。

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引用次数: 0

Antimony (Sb)-doped PbTe nanostructured alloys with improved optical and thermoelectrical characterizations for clean energy applications 掺杂锑 (Sb) 的 PbTe 纳米结构合金具有更好的光学和热电特性，可用于清洁能源应用

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2024-11-16 DOI: 10.1016/j.solidstatesciences.2024.107762

G.A. Ahmed , A.M. Adam , Vyacheslav Khavrus , Silke Hampel , E.M.M. Ibrahim

The current work investigates the influence of antimony doping on the morphology, optical behavior, and thermoelectric performance of PbTe nanostructures fabricated using the hydrothermal method. Analyses employing X-ray diffraction (XRD) and Raman spectroscopy techniques asserted the existence of the cubic phase, a defining characteristic of PbTe compounds. The morphology and internal structure of the samples are examined by the scanning and high-resolution transmission electron microscopes. The photoluminescence spectra show a band gap energy around 3.0 eV which is higher than that of the bulk sample. Raman spectra show three peaks corresponding to longitudinal optical (LO) phonon mode and higher-harmonic multiphonon process of PbTe. The PL spectra exhibit a strong peak at the wavelength 401 nm which is ascribed to a recombination of excitons and/or shallowly trapped electron–hole pairs. The thermoelectric properties are studied in the temperature range of 300–500 K and confirm the domination of p-type conduction in the whole temperature range. The electrical conductivity (σ) versus temperature showed thermally activated behavior as the charge carrier mobility is activated and the average carrier kinetic energy increases with temperature. Activation energy was obtained from the plots of Ln σ as a function of 1000/T. The recorded values were found at 62, 50,73 and 34 meV for x = 0, 0.04, 0.06 and 0.08, respectively. The Seebeck coefficients (S) of the synthesized nanostructures revealed a dominance of p-type conduction due to consistently positive S values. The S-T plots exhibit an initial increase in S with temperature at lower values (T < Tₛ). However, a transition occurs at a specific temperature (Tₛ), marked by a step change in S from positive to negative values, followed by a decrease in S with further temperature rise (T > Tₛ). The highest Seebeck coefficient was observed around 196.2 μV/K and recorded at 418 K for the sample of x = 0.04 Sb content. The largest power factor was recorded at 13.6 × 10⁻⁵ W. m⁻¹. K⁻², obtained for pure PbTe at 438 K due to the high value of electrical conductivity.

目前的工作研究了掺锑对水热法制造的碲化镉纳米结构的形态、光学行为和热电性能的影响。利用 X 射线衍射 (XRD) 和拉曼光谱技术进行的分析表明，存在立方相，这是碲化镉化合物的显著特征。扫描电子显微镜和高分辨率透射电子显微镜对样品的形态和内部结构进行了检测。光致发光光谱显示带隙能量约为 3.0 eV，高于块状样品的带隙能量。拉曼光谱显示出三个峰值，分别对应于 PbTe 的纵向光学（LO）声子模式和高次谐波多声子过程。聚光光谱在波长 401 nm 处显示出一个强峰值，这是由于激子和/或浅俘获电子-空穴对的重组所致。在 300-500 K 的温度范围内对热电性能进行了研究，结果证实在整个温度范围内 p 型传导占主导地位。电导率（σ）与温度的关系表现出热激活行为，因为电荷载流子迁移率被激活，平均载流子动能随温度升高而增加。活化能是从 Ln σ 与 1000/T 的函数关系图中获得的。在 x = 0、0.04、0.06 和 0.08 时，记录的值分别为 62、50、73 和 34 meV。合成纳米结构的塞贝克系数（S）显示，由于 S 值始终为正，因此 p 型传导占主导地位。S-T 图显示，在较低值 (T < Tₛ)时，S 值最初随温度升高而增加。然而，在特定温度（Tₛ）下会发生转变，其标志是 S 值从正值阶跃变为负值，随后随着温度的进一步升高（T >Tₛ），S 值下降。对于 x = 0.04 Sb 含量的样品，最高塞贝克系数约为 196.2 μV/K，记录于 418 K。最大的功率因数为 13.6 × 10-5 W. m-1.K-2，这是纯碲化镉在 438 K 时获得的，原因是其电导率值很高。

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引用次数: 0

Development of graphene/MWCNT/Ag2Se hybrid thermoelectric materials with different concentrations of PEDOT:PSS for low-temperature applications 开发具有不同浓度 PEDOT:PSS 的石墨烯/MWCNT/Ag2Se 混合热电材料，用于低温应用

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2024-11-15 DOI: 10.1016/j.solidstatesciences.2024.107759

Gökhan Gürlek , Şeyma Özkan , Mert Şener , B. Oğuz Gürses , Yoldaş Seki

Studies in low-temperature applications in the fields of medicine and wearable technologies are limited to thermoelectric works with commercial poly(3,4-ethylenedioxy-thiophene):polystyrenesulfonate (PEDOT:PSS) aqueous solutions. Unlike other studies, in this study, the effects of adding graphene, multi-walled carbon nanotube (MWCNT) and silver selenide into PEDOT:PSS at different concentrations in the production of semiconductor polymer inks on the thermoelectric properties were examined using Taguchi analysis. In the examination without adding additives, as the ratio of PEDOT:PSS increased from 1 % to 3 % and 5 %, 2.50 and 4.92 times increase in electrical conductivity and 1.19 and 1.49 times increase in the Seebeck coefficient were observed, respectively. P- and n-type inks were produced in three different concentrations using four different materials. According to the results of the study, to obtain p-type material with good performance, the concentration of PEDOT:PSS in the mixture must be high and the Ag₂Se concentration must be low, and also to get a high-performance n-type material, the concentration of Ag₂Se must be as high as the homogeneous mixture allows, and PEDOT:PSS concentration must be low. When the highest Power Factor and Figure of Merit results were evaluated, PPp9 was found for p-type material and PPn2 was found for n-type material, and it is considered that these inks are suitable for printing with 3D printing technology.

医学和可穿戴技术领域的低温应用研究仅限于使用商用聚（3,4-乙二氧基噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）水溶液进行热电工作。与其他研究不同的是，本研究采用田口分析法考察了在生产半导体聚合物油墨时向 PEDOT:PSS 中添加不同浓度的石墨烯、多壁碳纳米管（MWCNT）和硒化银对热电性能的影响。在不添加添加剂的情况下，随着 PEDOT:PSS 的比例从 1 % 增加到 3 % 和 5 %，电导率分别增加了 2.50 倍和 4.92 倍，塞贝克系数分别增加了 1.19 倍和 1.49 倍。使用四种不同的材料生产了三种不同浓度的 P 型和 n 型油墨。研究结果表明，要获得性能良好的 p 型材料，混合物中 PEDOT:PSS 的浓度必须高，Ag2Se 的浓度必须低；要获得高性能的 n 型材料，Ag2Se 的浓度必须在均匀混合物允许的范围内尽可能高，PEDOT:PSS 的浓度必须低。在评估最高功率因数和优越性结果时，发现 p 型材料的功率因数为 PPp9，n 型材料的功率因数为 PPn2，因此认为这些油墨适合使用 3D 打印技术进行打印。

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引用次数: 0

The approach of increasing incident photon absorption and decreasing charge recombination in solar cells by regulating the bandgap energies of the CdSe0.3S0.7/CdSe photosensitizer layer 通过调节硒化镉 0.3S0.7/CdSe 光敏剂层的带隙能量来增加太阳能电池对入射光子的吸收和减少电荷重组的方法

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences

Pub Date : 2024-11-13 DOI: 10.1016/j.solidstatesciences.2024.107758

Saeedeh Souri, Maziar Marandi

CdSe_0.3S_0.7/CdSe quantum dot sensitized solar cells are a desirable choice for increasing photovoltaic efficiency due to their high light-harvesting efficiency. In this study, the CdSe_0.3S_0.7 chalcogenide quantum dots were adsorbed onto the TiO₂ NPs mesoporous film using the successive ionic layer adsorption and reaction (SILAR) method with variation cycles ranging from 1 to 7. when the thickness of the CdSe_0.3S_0.7 quantum dots is modified, the quantum dot sensitized solar cell with TiO₂ NPs/CdSe_0.3S_0.7(5c)/ZnS photoanode shows higher short circuit current density (J_SC), open circuit voltage (V_OC) and power conversion efficiency (PCE) values of 17.80 mA/cm², 530 mV and 3.25 %, respectively. The corresponding photoelectrode according to the results of Surface morphology analyses is still suitable for loading other quantum dots, because there are still large pores on the surface. The CdSe QDs were loaded using the Chemical Bath Deposition (CBD) technique at various times from 6 to 15 min' coverage of TiO₂ NPs/CdSe_0.3S_0.7 photoanode. The optimal thickness of the CdSe layer causes its energy levels to be aligned with the other layers and allowing photogenerated carriers to move between bands with a strong driving force before recombination. The cell with the TiO₂NPs/CdSe_0.3S_0.7(5 cycles)/CdSe(12min)/ZnS photoelectrode has the highest J_SC, V_OC and PCE values of 24.70 mA/cm², 580 mV and 6.25 %, respectively. The efficiency increased by 92 % compared to the reference cell, which only included CdSe0.3S0.7 QDs, and the IPCE and APCE curves had higher intensities and spanned a wider range of visible wavelengths. These changes are the result of enhanced light harvesting efficiency.

碲化镉0.3S0.7/碲化镉量子点敏化太阳能电池具有很高的光收集效率，是提高光电效率的理想选择。本研究采用连续离子层吸附和反应（SILAR）方法，将 CdSe0.3S0.7 卤化物量子点吸附到 TiO2 NPs 介孔薄膜上，变化周期为 1 到 7 个周期。当改变 CdSe0.3S0.7 量子点的厚度时，具有 TiO2 NPs/CdSe0.3S0.7(5c)/ZnS 光阳极的量子点敏化太阳能电池显示出更高的短路电流密度 (JSC)、开路电压 (VOC) 和功率转换效率 (PCE) 值，分别为 17.80 mA/cm2、530 mV 和 3.25 %。根据表面形貌分析的结果，相应的光电极仍然适合装载其他量子点，因为其表面仍然存在较大的孔隙。采用化学浴沉积（CBD）技术，在 TiO2 NPs/CdSe0.3S0.7 光阳极覆盖 6 到 15 分钟的不同时间内装载 CdSe QDs。硒化镉层的最佳厚度使其能级与其他层对齐，从而使光生载流子在重组前以强大的驱动力在带间移动。采用 TiO2NPs/CdSe0.3S0.7(5 个周期)/CdSe(12 分钟)/ZnS 光电极的电池具有最高的 JSC、VOC 和 PCE 值，分别为 24.70 mA/cm2、580 mV 和 6.25 %。与只包含 CdSe0.3S0.7 QD 的参考电池相比，效率提高了 92%，而且 IPCE 和 APCE 曲线的强度更高，可见光波长范围更广。这些变化是光收集效率提高的结果。

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引用次数: 0