{"title":"Analysis of electrical and optical loss in perovskite solar cells using a semi-analytical model","authors":"V. Sharma, R. Padmanabhan","doi":"10.1109/NMDC50713.2021.9677512","DOIUrl":"https://doi.org/10.1109/NMDC50713.2021.9677512","url":null,"abstract":"High-efficiency solar cells based on organometal-halide perovskites have been extensively reported. While there are many reports in literature regarding improved performance in these devices, only few reports provide detailed performance and theoretical efficiency limits in perovskite-based solar cells (PSCs). An analytical model accounting for both optical and electrical losses in a PSC has been largely unexplored. Our calculations provide a simple semi-analytical framework for the analysis of different loss mechanisms in a PSC, which enables the determination of theoretical performance and loss limits more accurately. We believe that this will aid in the design of high-performance PSCs.","PeriodicalId":6742,"journal":{"name":"2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC)","volume":"35 1 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75680403","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}
{"title":"Modeling and Investigation of Electronic Transport Properties of Boron or Nitrogen Substitution Doped Single Layer Graphene","authors":"L. Chandrasekar, K. P. Pradhan","doi":"10.1109/NMDC50713.2021.9677497","DOIUrl":"https://doi.org/10.1109/NMDC50713.2021.9677497","url":null,"abstract":"The key electronic property - interaction parameter $(r_{s})$ for boron (B) or nitrogen (N) substitution doped single layer graphene is analytically modeled. Further, the interaction parameter paves a route to explore the vital transport properties such as scattering time $(tau)$, conductivity $(sigma)$, and mobility $(mu)$, which have been investigated for B/N substitution doped graphene in this work. The interaction parameter for undoped pristine single layer graphene is constant and independent of carrier density and depends only on the dielectric constant of the substrate material. On the other hand, the interaction parameter for B/N substitution doped graphene is extensively influenced by shifting of Dirac point, non-zero bandgap due to dopant and carrier density. From the transport properties, it has been predicted that B/N substitution doped graphene exhibits significant asymmetric electronic transport behaviour in both electrons and holes rather symmetric in pristine graphene. Consequently, substitution doping in graphene suppresses ambipolar characteristics and highly leading to enhance the ON/OFF ratio. Also, the electronic and transport properties are the essential quantities of interest while modeling the low-dimensional devices. Therefore, investigation of electronic transport properties of B/N substitution doped graphene reveals more insights in the device modeling of doped graphene in field-effect device applications.","PeriodicalId":6742,"journal":{"name":"2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC)","volume":"57 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84889365","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}
G. Carnide, C. Sim, Y. Champouret, E. Amin-Chaloub, M. Kahn, R. Clergereaux
{"title":"Reactor-Injector: Synthesis and Direct Atomization of Nanoparticles Towards Nanocomposite Coatings Assisted by Plasma Process","authors":"G. Carnide, C. Sim, Y. Champouret, E. Amin-Chaloub, M. Kahn, R. Clergereaux","doi":"10.1109/NMDC50713.2021.9677474","DOIUrl":"https://doi.org/10.1109/NMDC50713.2021.9677474","url":null,"abstract":"Nanocomposite coatings (i.e. nano-objects embedded in a matrix coating) allot multifunctional properties to produce advanced materials. Depending on the type and the organization of the nano-objects inside the matrix a large range of applications can be achieved such as self-cleaning, anticorrosion, antiwear, superhydrophobicity and many more… From “bottom-up to “top-down” a large range of methods are reported. When stabilized preformed nanoparticles in solution are used in nanocomposite process, aggregation or agglomeration can occur. For that reason, the transport of the nanoparticles into matrix formation process is a challenge for the control of the final properties.","PeriodicalId":6742,"journal":{"name":"2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC)","volume":"9 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82585013","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}
{"title":"Design of optimal layer thickness in electrochromic devices","authors":"Shaurya Verma, T. Choudhury, R. Padmanabhan","doi":"10.1109/NMDC50713.2021.9677560","DOIUrl":"https://doi.org/10.1109/NMDC50713.2021.9677560","url":null,"abstract":"Electrochromic devices (ECDs) are extensively used in various applications. While multiple compositions of electrochromic, electrolyte, and ion storage layer materials have been investigated, design guidelines that account for the impact of thickness of these layers on the optical response of ECDs remains unexplored. The optical performance of ECDs have been analyzed using the transfer matrix method. Our calculations show the significance of optimizing thickness of different layers in ECDs, for obtaining high-performance devices. We have illustrated the same by applying these analysis techniques to experimentally fabricated devices reported in literature. We believe that this insight will aid in the design of ECDs.","PeriodicalId":6742,"journal":{"name":"2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC)","volume":"12 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80719851","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}
{"title":"The impact of loss on plasmonic resonances in a slit in a real metal","authors":"Zohreh Sharifi, R. Gordon","doi":"10.1109/NMDC50713.2021.9677561","DOIUrl":"https://doi.org/10.1109/NMDC50713.2021.9677561","url":null,"abstract":"There is a common misconception that a narrower slit leads to more enhancement but in the presence of loss, the narrowest slit does not give the highest field enhancement which is important for SERS and nonlinear optics applications. Here, the impact of loss on the plasmonic resonances in metal-insulator-metal slits is analyzed. The reflection of TM light in a subwavelength slit in a real metal has been calculated using mode matching theory and orthogonality principle of electric and magnetic field for a real metal exhibiting both dispersion and loss. Then the calculated reflection phase has been used to calculate plasmonic resonances. The impact of metal loss and the presented theory on plasmonic resonances is investigated. The theoretical calculations agree well with comprehensive simulations, but differ substantially from the conjugated orthogonality result, as was used in past analytical works, showing promise for simple theoretical investigation of future plasmonic MDM structures.","PeriodicalId":6742,"journal":{"name":"2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC)","volume":"134 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86321400","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}
{"title":"Miniaturized Dual-Mode Intravascular Transducer for Sonothrombolysis","authors":"Bohua Zhang, Huaiyu Wu, Xiaoning Jiang","doi":"10.1109/NMDC50713.2021.9677491","DOIUrl":"https://doi.org/10.1109/NMDC50713.2021.9677491","url":null,"abstract":"Compared with traditional thrombolysis methods such as mechanical thrombectomy or pharmaceutical drug treatment, ultrasound thrombolysis has been reported to have high thrombolysis efficiency and safety. Notably, the intravascular thrombolysis with miniaturized ultrasound devices has drawn more attention due to its drug and agent delivery capability during the sonothrombolysis process. This paper presented a miniaturized dual-mode ultrasound transducer with piezoelectric stacks and a laser ultrasound transducer. By combining a low-frequency (600 kHz) tone burst sonication and a high-frequency (7.4 MHz) laser ultrasound pulse excitation, intravascular sonothrombolysis with enhanced thrombolysis was expected.","PeriodicalId":6742,"journal":{"name":"2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC)","volume":"27 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83535990","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}
{"title":"Quantum Transport in Conductive Bacterial Nanowires","authors":"William Livernois, M. Anantram","doi":"10.1109/NMDC50713.2021.9677490","DOIUrl":"https://doi.org/10.1109/NMDC50713.2021.9677490","url":null,"abstract":"The electrical properties of conductive heme-based nanowires found in the pili in Geobacter sulfurreducens bacteria were investigated using a density functional theory (DFT) model. Green's function methods were used to calculate quantum transmission and single molecule conductance in both the low temperature (coherent) and room temperature (decoherent) regimes. Several approaches were attempted for modeling the energy levels of the heme-sites, including semi-empirical methods, and quantum transmission was calculated at several different length scales. This result was compared to experimental findings as well as other modeling results for similar cytochrome structures, such as electron hopping models applied to neighboring heme sites. The results show that coordinated hemes prefer a low spin state with electron delocalization over the porphyrin rings and coordinating histidine groups from the protein scaffold. Orbital overlap between heme centers was shown to have a significant impact on quantum transport, with perpendicular heme centers having a rate limiting effect on transport. Semi-empirical models such as the extended Hückel method were found to be inaccurate for modeling transport, showing the importance of electron-electron repulsion and a more detailed model for the organometallic bonding.","PeriodicalId":6742,"journal":{"name":"2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC)","volume":"40 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73249435","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}
G. Hajisalem, Mirali Seyed Shariatdoust, Rana Faryad Ali, B. Gates, P. Barclay, R. Gordon
{"title":"Individual Nanoflakes of Two Dimensional Materials Harmonic Generation with Ultralow Pump Power","authors":"G. Hajisalem, Mirali Seyed Shariatdoust, Rana Faryad Ali, B. Gates, P. Barclay, R. Gordon","doi":"10.1109/NMDC50713.2021.9677477","DOIUrl":"https://doi.org/10.1109/NMDC50713.2021.9677477","url":null,"abstract":"Two dimensional materials with nonlinear optical response are of interest for bioimaging and optical information processing. However, achieving a measurable second order nonlinear signal in thin films and two dimensional materials has relied on using pulsed lasers and intense optical focusing, which limits potential applications require nonlinear response by using low laser power or from nanoscale materials. Here we achieved second harmonic generation from nanoflakes of two dimensional materials with lateral size smaller than the diffraction limit by using a double nanohole plasmonic optical tweezer with a low-power continuous-wave laser. The plasmonic double nanohole aperture enhances the local field intensity and allows for single nanoflake trapping and significant second harmonic generation at the nanoscale. The two dimensional property of nanoflakes allows for positioning in an area with high local field intensity and achieving higher nonlinear response than bulk nonlinear nanoparticlesWe observed an increase in second harmonic generation power two orders of magnitude higher than. other bulk materials such as lithium niobate nanoparticles. This allows for having strong nonlinear generation at the nanoscale for applications such as subwavelength nonlinear imaging or information processing.","PeriodicalId":6742,"journal":{"name":"2021 IEEE 16th Nanotechnology Materials and Devices Conference (NMDC)","volume":"32 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73833561","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}