Applied Physics Letters最新文献_第10页

Temperature-dependent charge transport measurements unveil morphological insights in non-fullerene organic solar cells 随温度变化的电荷传输测量揭示了非富勒烯有机太阳能电池的形态学原理

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-09-03 DOI: 10.1063/5.0214151

Chujun Zhang, Erming Feng, Yaxin Gao, Vox Kalai Wong, Hengyue Li, Biao Liu, Sudhi Mahadevan, Sai-Wing Tsang, Junliang Yang, Shu Kong So

{"title":"Temperature-dependent charge transport measurements unveil morphological insights in non-fullerene organic solar cells","authors":"Chujun Zhang, Erming Feng, Yaxin Gao, Vox Kalai Wong, Hengyue Li, Biao Liu, Sudhi Mahadevan, Sai-Wing Tsang, Junliang Yang, Shu Kong So","doi":"10.1063/5.0214151","DOIUrl":"https://doi.org/10.1063/5.0214151","url":null,"abstract":"The morphological analysis of bulk heterojunction (BHJ) active layer stands as a critical imperative for advancing the performance of future organic solar cells. Conventional characterization tools employed for morphological investigation often require substantial resources, both in cost and physical space, thereby imposing restraints on research endeavors in this domain. Here, we extend the application of charge carrier transport characterization beyond conventional mobility assessments, utilizing it as a table-top method for preliminary morphological screening in organic thin films. The investigation focuses on several high-performance BHJ systems that utilize typical “Y” non-fullerene acceptors. It involves in-depth transport studies, including temperature- and field-dependent transport characterizations. The resulting transport data are analyzed in detail using the Gaussian disorder model to extract key transport parameters, specifically the high-temperature limited mobility (μ∞) and positional disorder (∑). Integrating these transport parameters with morphological insights obtained through various characterization tools—including x-ray scattering, sensitive spectroscopy, and quantum chemistry simulation—provides a deep understanding of the intricate interplay between charge transport properties and morphological characteristics. The results reveal explicit relationships, associating μ∞ with the degree of molecular stacking in BHJs and ∑ with the structural disorder in molecule skeleton. Our findings point to the promising potential of utilizing a simple transport characterization technique for the early stage evaluation of thin film packing and geometric properties of organic materials.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spin injection at MgB2-superconductor/ferromagnet interface MgB2 超导体/铁磁体界面的自旋注入

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-09-03 DOI: 10.1063/5.0220815

C. Pfaff, S. Petit-Watelot, S. Andrieu, L. Pasquier, J. Ghanbaja, S. Mangin, K. Dumesnil, T. Hauet

引用次数: 0

Origin of zero thermal expansion in an average cubic structure in Pb-free relaxor ferroelectrics 无铅弛豫铁电体中平均立方结构的零热膨胀起源

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-09-03 DOI: 10.1063/5.0219631

Anuvrat Tripathi, Abhishek Pandey, Jose Antonio Alonso, Rudolph Erasmus, Maria Teresa Fernandez-Diaz, Saurabh Tripathi

{"title":"Origin of zero thermal expansion in an average cubic structure in Pb-free relaxor ferroelectrics","authors":"Anuvrat Tripathi, Abhishek Pandey, Jose Antonio Alonso, Rudolph Erasmus, Maria Teresa Fernandez-Diaz, Saurabh Tripathi","doi":"10.1063/5.0219631","DOIUrl":"https://doi.org/10.1063/5.0219631","url":null,"abstract":"This study presents “K0.5Na0.5NbO3-based” Pb-free smart material 0.80(K0.5Na0.5NbO3)–0.20(Ba0.9Sr0.1TiO3) (KBST20) as exhibiting zero thermal expansion (ZTE) at low temperatures (T≤ 100 K) with long-range cubic symmetry stable over a wide temperature range (9 K ≤T≤ 500 K). The linear coefficient of the thermal expansion (αl) obtained from temperature-dependent neutron diffraction data is in the range of 0.255–5.75 × 10−6 K–1 (9–500 K), which is rarely observed for Pb-free materials possessing long-range cubic symmetry. The temperature-dependent dielectric data of KBST20 exhibits a strong relaxational behavior with high frequency dispersion (ΔT≈ 27 K), suggesting the presence of polar phased regions known as polar nano regions. The ZTE has been attributed to enhanced correlations among PNRs exhibiting ferroelectrostriction. Furthermore, temperature-dependent Raman scattering data reveal polar monoclinic distortion at short ranges rather than cubic symmetry at long ranges. In addition, the intensity of Raman modes increases with the decrease in temperature, suggesting enhancement of the polar phase at low temperatures, which consequently leads to zero thermal expansion in KBST20.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strain-mediated reservoir computing with temporal and spatial co-multiplexing in multiferroic heterostructures 多铁氧体异质结构中时空共复用的应变介导储层计算

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-09-03 DOI: 10.1063/5.0221747

Yiming Sun, Xing Chen, Chao Chen, Baojia Liu, Bingyu Chen, Zhiyuan Zhao, Dahai Wei, Christian H. Back, Wang Kang, Weisheng Zhao, Na Lei

{"title":"Strain-mediated reservoir computing with temporal and spatial co-multiplexing in multiferroic heterostructures","authors":"Yiming Sun, Xing Chen, Chao Chen, Baojia Liu, Bingyu Chen, Zhiyuan Zhao, Dahai Wei, Christian H. Back, Wang Kang, Weisheng Zhao, Na Lei","doi":"10.1063/5.0221747","DOIUrl":"https://doi.org/10.1063/5.0221747","url":null,"abstract":"Physical reservoir computing (PRC), a brain-inspired computing method known for its efficient information processing and low training requirements, has attracted significant attention. The key factor lies in the number of computational nodes within the reservoir for its computational capability. Here, we explore co-multiplexing reservoirs that leverage both temporal and spatial strategies. Temporal multiplexing virtually expands the node count through the use of masking techniques, while spatial multiplexing utilizes multiple physical locations (e.g., Hall bars) to achieve an increase in the number of real nodes. Our experiment employs a strain-mediated reservoir based on multiferroic heterostructures. By applying a single voltage across the PMN-PT substrate (acting as global input) and measuring the output Hall voltages from four Hall bars (real nodes), we achieve significant efficiency gains. This co-multiplexing approach results in a reduction in the normalized root mean square error from 0.5 to 0.23 for a 20-step prediction task of a Mackey–Glass chaotic time series. Furthermore, the single input and four independent outputs lead to a fourfold reduction in energy consumption compared to the strain-mediated PRC with temporal multiplexing solely. This research paves the way for future energy saving PRC implementations utilizing co-multiplexing, promoting a resource-efficient paradigm in reservoir computing.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two-photon upconversion photoluminescence in CsPbBr3 nanoplates CsPbBr3 纳米板中的双光子上转换光致发光

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-09-03 DOI: 10.1063/5.0210918

Yu Rong, Shuai Yuan, Jun Zhan, Xiao Huang, Jie Gao, Xiaowen Gao, Xinli Wang, Hao-Yi Wang, Xi-Cheng Ai

{"title":"Two-photon upconversion photoluminescence in CsPbBr3 nanoplates","authors":"Yu Rong, Shuai Yuan, Jun Zhan, Xiao Huang, Jie Gao, Xiaowen Gao, Xinli Wang, Hao-Yi Wang, Xi-Cheng Ai","doi":"10.1063/5.0210918","DOIUrl":"https://doi.org/10.1063/5.0210918","url":null,"abstract":"The utilization of solar energy by light conversion processes in both natural and artificial photosynthesis systems has become a pivotal means of sustaining a consistent power supply for our daily lives and production. In general, these reactions rely on the visible spectra region where the sun produces abundant energy according to the black body's emission. Further expanding the adoption of the near-infrared (NIR) spectral region through upconversion has become an intelligent strategy to improve the entire utilization rate of solar energy. In this work, the two-photon upconversion (TPUC) properties were discovered in CsPbBr3 nanoplates (NPs) emitted at 450 nm, and a sub-gap energy level was observed to serve as the center to facilitate the upconversion process. The excitation threshold for TPUC is drastically lower than that for the two-photon absorption, another nonlinear upconversion path that requires strengthened excitation power. Moreover, a significant negative correlation between the excitation threshold for TPUC in the CsPbBr3 NPs and the exciton binding energy was unveiled, which could be attributed to the enhanced quantum confinement effects. Our work paved the way for a feasible way to expand the utilization of the NIR spectral region in light conversion applications.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142130481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large-scale integration of MoS2 on high-TC superconducting YBa2Cu3O7 for the realization of Josephson devices 在高导磁超导 YBa2Cu3O7 上大规模集成 MoS2 以实现约瑟夫森器件

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-08-30 DOI: 10.1063/5.0216735

K. Seurre, M. Ayachi, F. Godel, S. J. Carreira, B. Dlubak, P. Seneor, V. Humbert, J. E. Villegas

引用次数: 0

Self-aligned gate electrode for hydrogen-terminated diamond field-effect transistors with a hexagonal boron nitride gate insulator 带有六角氮化硼栅极绝缘体的氢封端金刚石场效应晶体管自对准栅极

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-08-29 DOI: 10.1063/5.0224192

Yosuke Sasama, Takuya Iwasaki, Mohammad Monish, Kenji Watanabe, Takashi Taniguchi, Yamaguchi Takahide

{"title":"Self-aligned gate electrode for hydrogen-terminated diamond field-effect transistors with a hexagonal boron nitride gate insulator","authors":"Yosuke Sasama, Takuya Iwasaki, Mohammad Monish, Kenji Watanabe, Takashi Taniguchi, Yamaguchi Takahide","doi":"10.1063/5.0224192","DOIUrl":"https://doi.org/10.1063/5.0224192","url":null,"abstract":"Diamond electronic devices have attracted significant interest owing to their excellent semiconducting properties. We recently demonstrated that eliminating surface-transfer doping enhances carrier mobility and achieves normally off behavior in diamond field-effect transistors (FETs) with a hexagonal boron nitride (h-BN) gate insulator. In our previous study, the gate electrode was overlapped onto the source/drain electrodes to prevent the increase in access resistance caused by excluding surface-transfer doping. However, it is known that gate overlap increases parasitic capacitance and gate leakage current. In this study, we developed a technique for self-aligning the gate electrode with the edge of h-BN using oblique-angle deposition. The diamond FET with a self-aligned gate electrode exhibits optimal FET characteristics, including high mobility of ≈ 400 cm2V−1s−1, low sheet resistance of 2.4 kΩ, and output characteristics demonstrating pinch-off behavior. Furthermore, the capacitance-voltage characteristics clearly indicate distinct ON and OFF states, validating the efficacy of this technique. This method enables the fabrication of diamond/h-BN FETs with no gate overlap and without increasing access resistance, making it a promising approach for developing high-speed, low-loss diamond FETs with a wide range of applications.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142100998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of high-Q suspended AlGaAs microresonators for efficient Kerr comb generation 制造高 Q 值悬浮式 AlGaAs 微谐振器，实现高效克尔梳生成

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-08-29 DOI: 10.1063/5.0219095

Yuqian Zhang, Changzheng Sun, Bing Xiong, Jian Wang, Zhibiao Hao, Lai Wang, Yanjun Han, Hongtao Li, Yi Luo

{"title":"Fabrication of high-Q suspended AlGaAs microresonators for efficient Kerr comb generation","authors":"Yuqian Zhang, Changzheng Sun, Bing Xiong, Jian Wang, Zhibiao Hao, Lai Wang, Yanjun Han, Hongtao Li, Yi Luo","doi":"10.1063/5.0219095","DOIUrl":"https://doi.org/10.1063/5.0219095","url":null,"abstract":"AlGaAs is a promising integrated nonlinear photonics material with enormous optical nonlinearity and high refractive index. Nevertheless, presently AlGaAs microring resonators exhibiting high-quality factors and tight optical confinement rely predominantly on wafer bonding techniques, which entail an intricate fabrication process. Here, we present suspended AlGaAs waveguides and resonators as a viable platform for high efficiency integrated nonlinear photonics. The suspended microring resonator formed by combined plasma dry etching and chemical wet etching exhibits an intrinsic quality factor Q of 2.1×106, corresponding to an optical loss of 0.28 dB/cm, and Kerr comb generation with milliwatt level threshold is recorded. The proposed scheme can be implemented with a relatively simple fabrication process, as it eliminates the need for wafer bonding. Without the hinderance of SiO2 or Al2O3 claddings, the air-clad suspended AlGaAs platform lends itself directly to applications in the mid-infrared region. Our demonstration opens up a prospect for employing AlGaAs devices in integrated nonlinear photonics.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142100990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Frequency-astigmatism asymmetric nonlinear conversion of structured light lasers 结构光激光器的频率-远视非对称非线性转换

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-08-29 DOI: 10.1063/5.0159662

Jing Pan, Hao Wang, Zijian Shi, Yijie Shen, Xing Fu, Qiang Liu

引用次数: 0

Photoelectric charge from metallic filters: An online XUV pulse energy diagnostics 金属滤波器的光电荷：在线 XUV 脉冲能量诊断

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-08-29 DOI: 10.1063/5.0213554

Matyáš Staněk, Ondřej Hort, Lucie Jurkovičová, Martin Albrecht, Ondřej Finke, Balázs Nagyillés, Balázs Farkas, Tamás Csizmadia, Tímea Grósz, Andor Körmöczi, Zsolt Divéki, Jaroslav Nejdl

{"title":"Photoelectric charge from metallic filters: An online XUV pulse energy diagnostics","authors":"Matyáš Staněk, Ondřej Hort, Lucie Jurkovičová, Martin Albrecht, Ondřej Finke, Balázs Nagyillés, Balázs Farkas, Tamás Csizmadia, Tímea Grósz, Andor Körmöczi, Zsolt Divéki, Jaroslav Nejdl","doi":"10.1063/5.0213554","DOIUrl":"https://doi.org/10.1063/5.0213554","url":null,"abstract":"Extreme ultraviolet (XUV) radiation is a tool of choice for studying ultrafast processes and atomic physics. Most experiments employing sources of XUV radiation, such as high harmonic generation (HHG) or x-ray lasers, benefit from knowing the number of photons delivered to target in every single shot, because of the possible shot-to-shot pulse fluctuation of the sources. Nonetheless, many setups lack noninvasive XUV pulse energy diagnostics, hindering the simultaneous measurement of pulse energy and utilization of the XUV beam for applications. We present an online XUV pulse energy monitoring method based on the detection of photoelectric charge from thin metallic foil filters transmitting the XUV beam, which can be easily implemented at every pulsed XUV source that includes a high-pass filter system in the form of metallic filters. Consequently, implementation of our method is as straightforward as connecting the filter to an oscilloscope. In the paper, we describe all the physics aspects of such measurement and show the dependence of measured photoelectric charge on the incident pulse energy. To prove the versatility of our approach, we performed this measurement on two different high-flux HHG beamlines, taking consecutive shots at 1 kHz.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142100989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0