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Japanese Journal of Applied Physics最新文献

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Surface plasmon resonance synergistic coupling effects of gold nanoparticulates with silver grating in P3HT:PC61BM based organic solar cell 基于 P3HT:PC61BM 的有机太阳能电池中金纳米粒子与银光栅的表面等离子体共振协同耦合效应
Japanese Journal of Applied Physics Pub Date : 2024-05-02 DOI: 10.35848/1347-4065/ad46b4
Joseph Baki Kaore, S. Jonai, Akira Baba, K. Shinbo, K. Kato
{"title":"Surface plasmon resonance synergistic coupling effects of gold nanoparticulates with silver grating in P3HT:PC61BM based organic solar cell","authors":"Joseph Baki Kaore, S. Jonai, Akira Baba, K. Shinbo, K. Kato","doi":"10.35848/1347-4065/ad46b4","DOIUrl":"https://doi.org/10.35848/1347-4065/ad46b4","url":null,"abstract":"\u0000 A systematic study was carried out to observe possible boosts in the performance of poly-(3-hexyl thiophene): phenyl-C61-butyric acid methyl ester (P3HT:PC61BM) based organic solar cell via synergistic coupling of plasmonic effects. Various volume concentration ratios of gold nanoparticles and nanorods ranging from 2%, 4%, 6%, 8% were used to determine an optimum condition. An indicative 2% optimum condition led to synergistic tests. Synergistic coupling of gold nanorods with backcontact grating revealed a power conversion efficiency (PCE) of 4.88%. Since post thermal annealing process results in optimum interfacial surface morphology and structural reorganization, a post process hypothesis was performed to observe the behavior of the devices at room temperature with further comparisons at 40°C. A further increase in the initial performance of the devices were observed with an optimum PCE of 5.43%. The behavior in the performances revealed stable measurements mostly attributed to conditions below glass transition temperature of P3HT:PC61BM.","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"15 30","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141020251","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
Flexible arrays of GaN-based Micro-LED fabricated on different substrates by laser lift-off process 通过激光升离工艺在不同基底上制造出基于氮化镓的微型 LED 柔性阵列
Japanese Journal of Applied Physics Pub Date : 2024-05-02 DOI: 10.35848/1347-4065/ad46af
Long Yue, Jianxi Xu, xiao wang, Jizong Zhou, Yuning Wang, Lei Yao, M. Niu, Mingyue Wang, Bing Cao, Yu Xu, Jianfeng Wang, Ke Xu
{"title":"Flexible arrays of GaN-based Micro-LED fabricated on different substrates by laser lift-off process","authors":"Long Yue, Jianxi Xu, xiao wang, Jizong Zhou, Yuning Wang, Lei Yao, M. Niu, Mingyue Wang, Bing Cao, Yu Xu, Jianfeng Wang, Ke Xu","doi":"10.35848/1347-4065/ad46af","DOIUrl":"https://doi.org/10.35848/1347-4065/ad46af","url":null,"abstract":"\u0000 Fabrication of flexible micro-light-emitting diodes (Micro-LEDs) is becoming an important technology for flexible displays, which plays a significant role in the field of visual communication in the upcoming internet of things era and metaverse. Here, we explore high-quality laser lift-off methods for gallium nitride (GaN)-based Micro-LED arrays using laser lift-off (LLO) technology to separate Micro-LED arrays from sapphire substrates via a KrF excimer laser system (λ = 248 nm). Ultimately, we used viscoelastic stamp transfer technology to successfully transfer Micro-LED arrays to various types of substrates, including tape and copper foil (Cu), thus enabling applications in different scenarios. The results show that the threshold voltage and EL intensity of Micro-LEDs on the tape and Cu substrates increase slightly, and the peak of the electroluminescence (EL) spectrum was basically stable at 458nm. Furthermore, Micro-LEDs on polyethylene terephthalate (PET) can still work normally when the bending radius of PET is 4 cm.","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"25 46","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141019929","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
Comparison of hydration structure formed on organic crystal surfaces measured by frequency modulation atomic force microscopy 通过频率调制原子力显微镜测量有机晶体表面形成的水合结构的比较
Japanese Journal of Applied Physics Pub Date : 2024-05-02 DOI: 10.35848/1347-4065/ad4657
Naritaka Kobayashi
{"title":"Comparison of hydration structure formed on organic crystal surfaces measured by frequency modulation atomic force microscopy","authors":"Naritaka Kobayashi","doi":"10.35848/1347-4065/ad4657","DOIUrl":"https://doi.org/10.35848/1347-4065/ad4657","url":null,"abstract":"\u0000 Organic molecule crystalline materials have widely been utilized for various applications. Controlling their crystallization and morphology is important for improving their performance and functionality. We have been investigating fundamental mechanisms of crystal growth process of organic molecules from a view point of hydration structure formed at an interface between a crystal surface and a solution. In this review, we introduce our recent studies on comparison of hydration structure between organic crystal polymorphs and between organic crystal planes measured by frequency modulation atomic force microscopy (FM-AFM) combined with three-dimensional atomic force microscopy (3D-AFM), discussing the relationship of hydration structure with crystal growth process.","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"64 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141019152","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
Performance evaluation of polycrystalline Si1-xGex thin-film transistorsfabricated by continuous-wave laser lateral crystallization on glass substrates 在玻璃衬底上通过连续波激光横向结晶技术制造的多晶 Si1-xGex 薄膜晶体管的性能评估
Japanese Journal of Applied Physics Pub Date : 2024-05-02 DOI: 10.35848/1347-4065/ad46b1
Tatsuya Sagawa, K. Kitahara, A. Hara
{"title":"Performance evaluation of polycrystalline Si1-xGex thin-film transistorsfabricated by continuous-wave laser lateral crystallization on glass substrates","authors":"Tatsuya Sagawa, K. Kitahara, A. Hara","doi":"10.35848/1347-4065/ad46b1","DOIUrl":"https://doi.org/10.35848/1347-4065/ad46b1","url":null,"abstract":"\u0000 This study was aimed at elucidating the performance of continuous-wave laser lateral-crystallized (CLC) polycrystalline Si1-xGex (poly-Si1-xGex) thin-film transistors (TFTs). The transfer characteristics of the n-ch CLC poly-Si1-xGex TFTs (x = 0, 0.05, 0.1, and 0.3) exhibited a positive shift in the threshold voltage (Vth) with increasing Ge content. Furthermore, the off-current in the p-ch CLC poly-Si0.9Ge0.1 TFTs decreased with decreasing film thickness. These properties of the CLC poly-Si1-xGex TFTs can be attributed to the generation of acceptors and increment of gate SiO2/poly-Si1-xGex interface charge state with increasing Ge content. Generation of acceptors was also supported by Hall effect measurements. In addition, the thermal stability of acceptors up to 700 ℃ was elucidated through Hall effect measurements and TFT performance evaluations. Furthermore, we examined the origins of these acceptors. This experiment highlighted the sensitivity of Si1-xGex to Ge incorporation, even in small amounts.","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"24 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141021444","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
Adjustable effective electromechanical coupling of Lamb wave resonator using AlN/Sc0.096Al0.904N composite films 使用 AlN/Sc0.096Al0.904N 复合薄膜的可调式有效机电耦合 Lamb 波谐振器
Japanese Journal of Applied Physics Pub Date : 2024-05-02 DOI: 10.35848/1347-4065/ad46b2
Xiang Chen, Yan Liu, Yuanhang Qu, T. Luo, Xiyu Gu, Jiaqi Ding, Xiaoming Huang, Yao Cai, Wenjuan Liu, Shishang Guo, Chengliang Sun
{"title":"Adjustable effective electromechanical coupling of Lamb wave resonator using AlN/Sc0.096Al0.904N composite films","authors":"Xiang Chen, Yan Liu, Yuanhang Qu, T. Luo, Xiyu Gu, Jiaqi Ding, Xiaoming Huang, Yao Cai, Wenjuan Liu, Shishang Guo, Chengliang Sun","doi":"10.35848/1347-4065/ad46b2","DOIUrl":"https://doi.org/10.35848/1347-4065/ad46b2","url":null,"abstract":"\u0000 With the rapid development of fifth-generation communication technology, there are more and more 5G frequency bands and their bandwidths are different. Therefore, many researchers devote themselves to the study of resonators with adjustable electromechanical coupling coefficient. In this paper, we apply composite films to the Lamb wave resonator with a double-IDT configuration to achieve adjustable effective electromechanical coupling coefficient (Keff2) of the first symmetric mode. The experimental results show that the Keff2 is adjusted from 3.82% to 6.32% and the Δf is adjusted from 41MHz to 63MHz by using the AlN/Sc0.096Al0.904N composite films with different thickness ratios. This method may be an efficient way to adjust the bandwidth of the filter to meet the needs of different frequency bands.","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"36 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141019626","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
Theoretical analysis and experimental verification of spatial coherence of acoustic cavitation noise from bubble clusters under ultrasonic horn 超声波号角下气泡簇声学空化噪声空间相干性的理论分析与实验验证
Japanese Journal of Applied Physics Pub Date : 2024-05-02 DOI: 10.35848/1347-4065/ad4658
Takanobu Kuroyama, H. Ogasawara, K. Mori
{"title":"Theoretical analysis and experimental verification of spatial coherence of acoustic cavitation noise from bubble clusters under ultrasonic horn","authors":"Takanobu Kuroyama, H. Ogasawara, K. Mori","doi":"10.35848/1347-4065/ad4658","DOIUrl":"https://doi.org/10.35848/1347-4065/ad4658","url":null,"abstract":"\u0000 Acoustic cavitation bubbles under ultrasonic horn in water emit acoustic cavitation noise, which consists of spherical shockwaves. This study theoretically derived the spatial coherence of acoustic cavitation noise or, more precisely, the spectral degree of coherence. The acoustic cavitation noise was found to have spatial coherence characteristics similar to the \"thermal light\" in optics, unlike ultrasound generated by general transducers, which are analogous to \"laser\" with high coherence. The experiments validated the derived theory and showed that the spectral degree of coherence of the acoustic cavitation noise depends on the product between the distribution width of the shockwave origin, proportional to the horn diameter, and the angle between the hydrophones viewed from the horn. The lower the product gives, the higher the spectral degree of coherence at a higher frequency range.","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141022395","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
Impact of crystallinity on thermal conductivity of RF magnetron sputtered MoS2 thin films 结晶度对射频磁控溅射 MoS2 薄膜热导率的影响
Japanese Journal of Applied Physics Pub Date : 2024-05-02 DOI: 10.35848/1347-4065/ad46ae
Tatsuya Kitazawa, Yuta Inaba, Shunsuke Yamashita, Shinya Imai, Keita Kurohara, Tetsuya Tatsumi, Hitoshi Wakabayashi, Shigetaka Tomiya
{"title":"Impact of crystallinity on thermal conductivity of RF magnetron sputtered MoS2 thin films","authors":"Tatsuya Kitazawa, Yuta Inaba, Shunsuke Yamashita, Shinya Imai, Keita Kurohara, Tetsuya Tatsumi, Hitoshi Wakabayashi, Shigetaka Tomiya","doi":"10.35848/1347-4065/ad46ae","DOIUrl":"https://doi.org/10.35848/1347-4065/ad46ae","url":null,"abstract":"\u0000 This study investigates the effects of sulfur atomic defects and crystallinity on the thermal conductivity of MoS2 thin films. Utilizing scanning transmission electron microscopy (STEM), X-ray diffraction (XRD), and Raman spectroscopy, we examined MoS2 films, several nanometers thick, deposited on Si/SiO2 substrates. These films were prepared via a combination of RF magnetron sputtering and sulfur vapor annealing (SVA) treatment. Structural analyses, including cross-sectional STEM and in-plane and out-of-plane XRD measurements, revealed an increase in the S/Mo ratio and grain size of the MoS2 films following SVA treatment. Notably, the in-plane thermal conductivity of MoS2 films treated with SVA was found to be at least an order of magnitude higher than that of films without SVA treatment. This research suggests that the in-plane thermal conductivity of MoS2 thin films can be significantly enhanced through crystallinity improvement via SVA treatment.","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"7 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141018820","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
Evaluation of the spatial structure of multiline emission in a capacitively coupled plasma using tomographic reconstruction 利用断层重构评估电容耦合等离子体中多线发射的空间结构
Japanese Journal of Applied Physics Pub Date : 2024-05-02 DOI: 10.35848/1347-4065/ad46b0
Manabu Kyuzo, Kenta Harada, Ryota Izumi, H. Suzuki, H. Toyoda
{"title":"Evaluation of the spatial structure of multiline emission in a capacitively coupled plasma using tomographic reconstruction","authors":"Manabu Kyuzo, Kenta Harada, Ryota Izumi, H. Suzuki, H. Toyoda","doi":"10.35848/1347-4065/ad46b0","DOIUrl":"https://doi.org/10.35848/1347-4065/ad46b0","url":null,"abstract":"\u0000 By imaging a capacitively coupled plasma from multiple directions using telecentric lens cameras and optical bandpass filters, the spatial structure of emission at specific wavelengths was reconstructed using the Tikhonov–Phillips regularization method. Camera parameters, crucial for relating three-dimensional structures to two-dimensional images, were evaluated experimentally to avoid a complex analytical approach. Assuming an axisymmetric emission profile, 750.4 nm Ar and 585.2 nm Ne emissions from Ar/Ne mixture plasma were reconstructed. The pressure dependence of the reconstructed Ar profile showed a similar trend to that of the two-dimensional emission images. The spatial structure of the emission intensity ratio of Ne to Ar from the reconstructed Ar and Ne profiles agreed well with a spatial distribution of electron temperatures measured with a Langmuir probe.","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"27 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141023125","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
Data-volume reduction of optical vortex laser absorption spectroscopy by coarse-graining using a quadrant photodiode 通过使用象限光电二极管进行粗粒化，减少光学漩涡激光吸收光谱的数据量
Japanese Journal of Applied Physics Pub Date : 2024-05-02 DOI: 10.35848/1347-4065/ad46ab
Hiroki Minagawa, Shinji Yoshimura, K. Terasaka, M. Aramaki
{"title":"Data-volume reduction of optical vortex laser absorption spectroscopy by coarse-graining using a quadrant photodiode","authors":"Hiroki Minagawa, Shinji Yoshimura, K. Terasaka, M. Aramaki","doi":"10.35848/1347-4065/ad46ab","DOIUrl":"https://doi.org/10.35848/1347-4065/ad46ab","url":null,"abstract":"\u0000 We developed optical vortex laser absorption spectroscopy (OVLAS) to measure the transverse flow velocity relative to the probe beam. In our previous OVLAS setups, a camera is used in the measurement system. This approach constrained the time resolution by image data transfer time and required large computational resources due to the considerable amount of image data. In this paper, we discuss the coarse-graining of OVLAS as a method to improve time resolution and reduce computational resources achieved by replacing the camera with a quadrant photodiode (QPD). Measurement image data obtained from a camera was numerically coarse-grained to evaluate the feasibility of measurements using a QPD. Subsequently, the transverse flow velocity was measured by QPD. Measured transverse flow velocity had a mean absolute percentage error of 18%, confirming the practical validity of coarse-graining OVLAS. The data volume required to determine the flow velocity was reduced to 1/120 from the original OVLAS.","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"2 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141019198","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
Dielectric Thin Films for Future Electron Devices: Science and Technology 2023 未来电子设备的介质薄膜：2023 年的科学与技术
Japanese Journal of Applied Physics Pub Date : 2024-05-01 DOI: 10.35848/1347-4065/ad43f4
{"title":"Dielectric Thin Films for Future Electron Devices: Science and Technology 2023","authors":"","doi":"10.35848/1347-4065/ad43f4","DOIUrl":"https://doi.org/10.35848/1347-4065/ad43f4","url":null,"abstract":"","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"18 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141051044","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
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