Crystal Research and Technology最新文献_第9页

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-05-09

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IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-05-05

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IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-05-05

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Study on the Influence of Iron-Based Catalysts on the Planarization of GaN Wafers During Electro-Fenton Assisted CMP Polishing 电fenton辅助CMP抛光过程中铁基催化剂对GaN晶片平面化影响的研究

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-15 DOI: 10.1002/crat.70097

Wenjie Lv, Guomei Chen, Zifeng Ni, Shikun Zheng, Kai Chen, Xueyu Lu

{"title":"Study on the Influence of Iron-Based Catalysts on the Planarization of GaN Wafers During Electro-Fenton Assisted CMP Polishing","authors":"Wenjie Lv, Guomei Chen, Zifeng Ni, Shikun Zheng, Kai Chen, Xueyu Lu","doi":"10.1002/crat.70097","DOIUrl":"10.1002/crat.70097","url":null,"abstract":"<div>\u0000 \u0000 Electro-Fenton assisted chemical mechanical polishing (CMP) has been demonstrated as an effective technique for enhancing the surface oxidation efficiency of gallium nitride (GaN) substrates, where the valence and phase states of iron-based catalysts directly determine the oxidation capability of the system. Herein, the effects of three types of iron-based catalysts (i.e., homogeneous ferrous sulfate (FeSO4), homogeneous iron sulfate (Fe2(SO4)3), and heterogeneous ferroferric oxide (Fe3O4)) on the performance of electro-Fenton assisted GaN CMP were systematically investigated. ·OH generation kinetics and the formation behavior of the oxide layer were comprehensively characterized through fluorescence spectrophotometry, potentiodynamic polarization tests, and X-ray photoelectron spectroscopy (XPS). Iron cycling mechanisms in the electro-Fenton system were examined through elemental analysis of iron deposition on GaN surfaces. Experimental results indicated significant differences in polishing performance among the catalyst systems, with clear linear relationships observed among ·OH concentration, corrosion potential, and material removal rate (MRR). Based on these findings, an oxidation kinetics model of the GaN surface was established to elucidate the origin of these linear correlations.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 4","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708236","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}

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IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-15

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IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-15

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Solution Growth and Optical Properties of Lead-Free Single MACu2I3 Crystals with 1D Structure 一维结构无铅MACu2I3单晶的溶液生长和光学性质

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-14 DOI: 10.1002/crat.70099

Hanning Zou, XinXin Chen, Jiali Han, Can Chen, Yizhe Hu, Shangke Pan, Jianguo Pan

{"title":"Solution Growth and Optical Properties of Lead-Free Single MACu2I3 Crystals with 1D Structure","authors":"Hanning Zou, XinXin Chen, Jiali Han, Can Chen, Yizhe Hu, Shangke Pan, Jianguo Pan","doi":"10.1002/crat.70099","DOIUrl":"10.1002/crat.70099","url":null,"abstract":"<div>\u0000 \u0000 Lead halide perovskite has attracted extensive attention in the field of photoelectric conversion and detection due to its excellent photoelectric properties. However, the toxicity of lead and environmental pollution will affect the practical application. By substituting Cu+ for Pb2+ and MA+ for Cs+, a new organic–inorganic hybrid copper (I) halide MACu2I3 single crystal with 1D structure was successfully prepared by slow evaporation of solvent. The results show that the crystal belongs to the monoclinic system (P21/m), and the MACu2I3 single crystal is a direct band gap material with a direct band gap of 2.09 eV. The photoluminescence spectrum shows that the excitation peak of the MACu2I3 crystal is 330 nm, and the emission peaks are 415 and 610 nm, respectively, with the corresponding fluorescence decay times being 0.21 and 329 ns, indicating that the MACu2I3 single crystal exhibits ultrafast luminescence decay behavior. Therefore, this work highlights the potential of the MACu2I3 single crystal in the field of ultrafast optics.\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 4","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147708215","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}

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IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-14

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IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-14

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Raman Observation of the Chemical State of Ru/CeO2 Catalysts Ru/CeO2催化剂化学状态的拉曼观察

IF 1.9 4区材料科学

Crystal Research and Technology Pub Date : 2026-04-10 DOI: 10.1002/crat.70096

Oleksii Bezkrovnyi, Maciej Ptak, Mirosława Pawlyta, Michael Vorochta, Iva Matolínová

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