physica status solidi (a)最新文献

Photocatalytic Performance of ZnO@ZnS Core–Shell Heterostructures for Malachite Green and Rhodamine B Dye Degradation ZnO@ZnS 核壳异质结构在孔雀石绿和罗丹明 B 染料降解中的光催化性能

physica status solidi (a) Pub Date : 2024-07-22 DOI: 10.1002/pssa.202400404

Peeyush Phogat, Shreya, Ranjana Jha, Sukhvir Singh

{"title":"Photocatalytic Performance of ZnO@ZnS Core–Shell Heterostructures for Malachite Green and Rhodamine B Dye Degradation","authors":"Peeyush Phogat, Shreya, Ranjana Jha, Sukhvir Singh","doi":"10.1002/pssa.202400404","DOIUrl":"https://doi.org/10.1002/pssa.202400404","url":null,"abstract":"The one‐step green synthesis of wide band gap zinc oxide@zinc sulfide (ZnO@ZnS) core–shell nanostructures offers promising prospects in wastewater treatment. These nanostructures exhibit a porous nature crucial for effective dye adsorption, as evidenced by Brunauer‐Emmett‐Teller (BET) and microscopic characterization. The synthesized material demonstrates high stability and minimal agglomeration, verified through BET analysis and zeta potential measurements. X‐ray powder diffraction confirms the presence of ZnO and ZnS phases. Transmission electron microscopy reveals the development of porous nanorods on the core surface, maximizing the surface area for dye adsorption. In wastewater treatment, the nanostructures exhibit notable performance, degrading 90% of malachite green and 50% of rhodamine B dyes within 120 min under normal conditions. Detailed discussions delve into the degradation mechanism, elucidating the major species responsible for the process. This study underscores the potential of ZnO@ZnS nanostructures in efficient organic pollutant removal, marking a significant advancement in environmental remediation.","PeriodicalId":506741,"journal":{"name":"physica status solidi (a)","volume":"19 25","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141817439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ion Implantation‐Induced Bandgap Modifications in the ALD TiO2 Thin Films 离子注入诱导的 ALD TiO2 薄膜带隙改变

physica status solidi (a) Pub Date : 2024-07-15 DOI: 10.1002/pssa.202400205

Shahbaz Afzal, Muhammad Usman, Aamenah Siddiqui, R. Y. Khosa, Anders Hallén

{"title":"Ion Implantation‐Induced Bandgap Modifications in the ALD TiO2 Thin Films","authors":"Shahbaz Afzal, Muhammad Usman, Aamenah Siddiqui, R. Y. Khosa, Anders Hallén","doi":"10.1002/pssa.202400205","DOIUrl":"https://doi.org/10.1002/pssa.202400205","url":null,"abstract":"\u0000Atomic layer deposited (ALD) TiO2 layers are implanted with N, O, and Ar ions to reduce the bandgap, thereby increasing its absorbance in the visible region. The implantation is accomplished with 40 keV nitrogen, 45 keV oxygen, and 110 keV argon ions in the fluence range 1 × 1015 to 5.6 × 1016 ions cm−2. The energy of each incident ion is tuned using stopping and range of ions in matter (SRIM) to produce defects around the same projected range. The structural analysis of the as‐deposited film is performed through X‐ray diffraction (XRD), scanning electron microscopy (SEM), Rutherford backscattering (RBS), and time of flight elastic recoil detection analysis (ToF‐ERDA). The implanted layers are characterized using diffuse reflectance spectroscopy (DRS) and Fourier transform infrared spectroscopy (FTIR) to study the optical and vibrational properties of the films. The results demonstrate that nitrogen implantation in TiO2 reduces the reflectance from 43.52% to 26.31% and bandgap from 2.68 to 2.61 eV, making it a promising bandgap‐engineered material for capping layers in solar cell applications. The refractive index of the 40 keV nitrogen ion implanted film at 1 × 1016 ions cm−2 (N‐16) increases from ≈2.8 to ≈2.95. OPAL2 solar cell simulations show that the N‐16 implanted TiO2 anti‐reflective coatings (ARC) can enhance the absorbed photocurrent by 7.3%.","PeriodicalId":506741,"journal":{"name":"physica status solidi (a)","volume":"44 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141648784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing Charge Generation in Nonfullerene Interdigitated Heterojunction Organic Solar Cells 增强非富勒烯交错异质结有机太阳能电池的电荷发生能力

physica status solidi (a) Pub Date : 2024-07-15 DOI: 10.1002/pssa.202400364

Roya Salamatbakhsh, Davoud Raeyani, Asghar Asgari

引用次数: 0

Multilayer Diamond‐Like Carbon Films on Monocrystalline Diamond 单晶金刚石上的多层类金刚石碳薄膜

physica status solidi (a) Pub Date : 2024-07-15 DOI: 10.1002/pssa.202400345

Andrey Okhapkin, Mikhail Drozdov, Pavel Yunin, Stanislav Kraev, Sergey Korolyov, Dmitry Radishev

引用次数: 0

Positively Charged Defects in Ta2O5 and Nb2O5: Are They Correlated with Sodium Ions? Ta2O5 和 Nb2O5 中的正电荷缺陷：它们与钠离子相关吗？

physica status solidi (a) Pub Date : 2024-07-15 DOI: 10.1002/pssa.202400280

Vladimir Kolkovsky, Eberhard Kurth

引用次数: 0

Oxygen‐Rich Porous Organic Polymer for Thermal Energy Storage 用于热能储存的富氧多孔有机聚合物

physica status solidi (a) Pub Date : 2024-07-15 DOI: 10.1002/pssa.202400362

Ping Huang, Xiaowei Jiang, Zheng Dai, Qin Zhang, Xiaosong Chen, Libo Ma, Weibin Gao, Xu Xiong

{"title":"Oxygen‐Rich Porous Organic Polymer for Thermal Energy Storage","authors":"Ping Huang, Xiaowei Jiang, Zheng Dai, Qin Zhang, Xiaosong Chen, Libo Ma, Weibin Gao, Xu Xiong","doi":"10.1002/pssa.202400362","DOIUrl":"https://doi.org/10.1002/pssa.202400362","url":null,"abstract":"Oxygen atoms have been widely used in porous organic polymers, which has attracted much attention from researchers. Herein, porous organic polymer with high oxygen content is synthesized with oxygen‐rich monomer as construction unit and anhydrous aluminum chloride as catalyst; then phase‐change materials (PCMs) composites are prepared by self‐adsorption method. The pore properties of the oxygen‐rich porous organic polymer are characterized by nitrogen absorption and desorption method. The properties of the PCM composites are characterized by scanning electron microscopy, X‐ray diffraction, Fourier‐transform infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. The results show that the oxygen‐rich porous organic polymer has high Brunauer–Emmett–Teller surface area (465 m2 g−1) and excellent thermal stability. The PCM composites possess high encapsulation rate (50.6 wt%) and latent heat (124.7 kJ g−1). After several thermal cycles, the thermal properties of all PCM composites are almost unchanged, and no leakage phenomenon is found. It can be seen that oxygen‐rich porous polymers have potential applications in PCM adsorption and thermal energy storage.","PeriodicalId":506741,"journal":{"name":"physica status solidi (a)","volume":"45 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141645122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metolachlor Detection in Grain Using N‐Doped Carbon Quantum Dots and the Intramolecular Charge Transfer Effect 利用掺杂 N 的碳量子点和分子内电荷转移效应检测谷物中的甲草胺

physica status solidi (a) Pub Date : 2024-07-15 DOI: 10.1002/pssa.202400172

Jinchen Wang, Liyuan Zhang, Runzhong Yu

{"title":"Metolachlor Detection in Grain Using N‐Doped Carbon Quantum Dots and the Intramolecular Charge Transfer Effect","authors":"Jinchen Wang, Liyuan Zhang, Runzhong Yu","doi":"10.1002/pssa.202400172","DOIUrl":"https://doi.org/10.1002/pssa.202400172","url":null,"abstract":"\u0000Herein, nitrogen is doped into carbon quantum dots (N‐CQDs) using a hydrothermal method for the rapid detection of metolachlor in grain. The morphological features, elemental compositions, and optical properties of the N‐CQDs are then analyzed and investigated using transmission electron microscopy, X‐ray photoelectron spectroscopy, and fluorescence spectroscopy, respectively. Based on the principle of intramolecular charge transfer, a fluorescent probe is constructed for the rapid detection of metolachlor. Under optimal experimental conditions, the fluorescence intensity change values of the N‐CQDs and metolachlor concentration have a good linear relationship when the concentration of metolachlor is in the range of 0.0125−2.5 μg mL−1. An evaluation of the method shows that the method has good selectivity, reproducibility, and stability, with a limit of detection of 1.63 μg kg−1 and a limit of quantification of 3.92 μg kg−1. The spiked recoveries of six real samples are tested using a spiked recovery assay that yielded spiked recoveries in the range of 105.05−87.13%, and their relative standard deviations (n = 3) ranged from 4.62% to 0.61%, indicating that the method can be used for detection in actual samples with good precision and stability.","PeriodicalId":506741,"journal":{"name":"physica status solidi (a)","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141647559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Studies of Structural, Optical, and Raman Analysis of Ni‐Substituted CoFe2O4 镍取代 CoFe2O4 的结构、光学和拉曼分析研究

physica status solidi (a) Pub Date : 2024-07-12 DOI: 10.1002/pssa.202400083

Sarita, Anchal, Priya, Shobha Ram Choudhary, M. S. Rulaniya, Arvind Kumar, S. N. Dolia, P. A. Alvi, B. L. Choudhary

{"title":"Studies of Structural, Optical, and Raman Analysis of Ni‐Substituted CoFe2O4","authors":"Sarita, Anchal, Priya, Shobha Ram Choudhary, M. S. Rulaniya, Arvind Kumar, S. N. Dolia, P. A. Alvi, B. L. Choudhary","doi":"10.1002/pssa.202400083","DOIUrl":"https://doi.org/10.1002/pssa.202400083","url":null,"abstract":"The polycrystalline ferrite samples of NixCo1−xFe2O4 (x = 0.1, 0.3, 0.5, 0.7, and 0.9) are synthesized through the well‐known sol–gel method. The X‐ray diffraction (XRD) pattern confirms the cubic single‐phase spinel structure. Rietveld refinement indicates the absence of any other impurity phases in the samples. Additionally, XRD analysis reveals variations in lattice parameters corresponding to the doping. The Debye Scherer formula has been used to calculate the crystallite size of the samples, the crystallite size of the samples existing in the nanoregime. The results from field emission scanning electron microscopy confirm the morphological structure of the prepared samples. Additionally, the energy‐dispersive X‐ray spectra confirm the elemental composition and purity of the synthesized samples, validating the appropriateness of doping in the polycrystalline samples. The Raman spectra give the information about the vibrational modes in the sample. The Fourier transform infrared rays spectrum shows that the samples have a broad range of chemical interactions. The photoluminescence spectroscopy (PL) suggests strong luminescence in the visible range. PL spectroscopy provides that PL intensity decreases with increasing excitation wavelength due to nanosize of the particle.","PeriodicalId":506741,"journal":{"name":"physica status solidi (a)","volume":"92 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141652804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of Junction Temperature in Single 228 nm‐Band AlGaN Far‐Ultraviolet‐C Light‐Emitting Diode on c‐Sapphire Having 1.8 mW Power and 0.32% External Quantum Efficiency 估算功率为 1.8 mW、外部量子效率为 0.32% 的 c-Sapphire 228 nm 波段 AlGaN Far-Ultraviolet-C 发光二极管的结温

physica status solidi (a) Pub Date : 2024-05-23 DOI: 10.1002/pssa.202400064

M. Ajmal Khan, Mitsuhiro Muta, Kohei Fujimoto, Javier Gonzalez Rojas, P. Fredes, Ernesto Gramsch, Yasushi Iwaisako, Hiroyuki Yaguchi, Hideki Hirayama

{"title":"Estimation of Junction Temperature in Single 228 nm‐Band AlGaN Far‐Ultraviolet‐C Light‐Emitting Diode on c‐Sapphire Having 1.8 mW Power and 0.32% External Quantum Efficiency","authors":"M. Ajmal Khan, Mitsuhiro Muta, Kohei Fujimoto, Javier Gonzalez Rojas, P. Fredes, Ernesto Gramsch, Yasushi Iwaisako, Hiroyuki Yaguchi, Hideki Hirayama","doi":"10.1002/pssa.202400064","DOIUrl":"https://doi.org/10.1002/pssa.202400064","url":null,"abstract":"The increasing resistance of methicillin‐resistant Staphylococcusaureus to antibiotics is a major challenge faced by mankind in thehistory of medical science and according to United Nations, 700‐000 patients worldwide die every year from an infection with multidrug‐resistant organisms (MROs). Aluminum gallium nitride‐based 228 nm Far‐ultraviolet‐C (Far‐UVC) lightsources can be safely used as a germicidal application in both manned as wellas in unmanned environments against these MROs. Previously, the 228 nm Far‐UVC light‐emitting diode (LED) with emission power of 1 mW was reported by ourgroup, however, the value of external quantum efficiency (EQE) was not reportedusing conventional thick Ni (20 nm)/Au (100 nm) p‐electrode. Herein, animproved Far‐UVC LED on c‐Sapphire is attempted using a special technique in SR4000 type of metal‐organic chemical vapor deposition reactor to control the Al composition in n‐AlGaN buffer and across the 2 inch‐wafer. As a result, the light emission power of 1.8 mW and EQE of 0.32% in 228 nm Far‐UVC LED aresuccessfully achieved using very thin p‐electrode (Ni/Au). However, arelatively high junction temperature of ≈100°C around thejunction of Far‐UVC LED is observed. Finally, some simple heat‐sink modules forheat dissipation of Far‐UVC LED panel with light power of 30 mW are implemented.","PeriodicalId":506741,"journal":{"name":"physica status solidi (a)","volume":"18 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141107125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polarization‐Graded High‐Electron‐Mobility Transistors for Improved Johnson's Figure of Merit 偏振分级高电子迁移率晶体管，改善约翰逊功勋值

physica status solidi (a) Pub Date : 2024-05-21 DOI: 10.1002/pssa.202300923

N. Venkatesan, Gerardo Silva-Oelker, Wesley Turner, Jeong‐Sun Moon, Patrick Fay

{"title":"Polarization‐Graded High‐Electron‐Mobility Transistors for Improved Johnson's Figure of Merit","authors":"N. Venkatesan, Gerardo Silva-Oelker, Wesley Turner, Jeong‐Sun Moon, Patrick Fay","doi":"10.1002/pssa.202300923","DOIUrl":"https://doi.org/10.1002/pssa.202300923","url":null,"abstract":"\u0000Polarization grading in AlGaN/GaN‐based high‐electron‐mobility transistors (HEMTs) is a promising device design option that can improve linearity, speed, power, and noise performance for use in millimeter‐wave applications. This work investigates the potential of compositionally graded HEMT heterostructures to enhance device breakdown through lateral electric field engineering while maintaining a high device cutoff frequency (fT) due to reduced longitudinal optical (LO) phonon scattering. The impact of polarization grading on electric field profile is compared with conventional gate‐integrated mini‐field plates (mini‐FPs). It is also observed that polarization grading can augment the efficacy of gate‐connected FPs, further enhancing performance. Using physics‐based 2D device simulations, it is demonstrated that polarization engineering via polarization grading enhances breakdown (VBD) while preserving high fT, resulting in a Johnson's figure of merit (JFOM = fT × VBD), that is, ≈2.4× that of a conventional abrupt‐junction HEMT. This improvement represents a significant advancement over the ≈1.25× to ≈2× increase achieved with the use of mini‐FPs alone in HEMTs.","PeriodicalId":506741,"journal":{"name":"physica status solidi (a)","volume":"37 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141113766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0