Obywatelstwo społeczne

Theiss, Maria

doi:10.31338/uw.9788323525028.pp.13-28

Cited by 14 publications

(20 citation statements)

References 19 publications

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“…The experimental thin film spectra were modeled using the commercial software package Scout. 40 package. 41 The structure was optimized and then the harmonic frequencies were calculated.…”

Section: Experimental Methodsmentioning

confidence: 99%

Infrared Spectroscopic Study of Vibrational Modes in Methylammonium Lead Halide Perovskites

Glaser

Müller

Sendner

et al. 2015

J. Phys. Chem. Lett.

323

317

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The organic cation and its interplay with the inorganic lattice underlie the exceptional optoelectronic properties of organo-metallic halide perovskites. Herein we report high-quality infrared spectroscopic measurements of methylammonium lead halide perovskite (CH3NH3Pb(I/Br/Cl)3) films and single crystals at room temperature, from which the dielectric function in the investigated spectral range is derived. Comparison with electronic structure calculations in vacuum of the free methylammonium cation allows for a detailed peak assignment. We analyze the shifts of the vibrational peak positions between the different halides and infer the extent of interaction between organic moiety and the surrounding inorganic cage. The positions of the NH3(+) stretching vibrations point to significant hydrogen bonding between the methylammonium and the halides for all three perovskites.

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“…The experimental thin film spectra were modeled using the commercial software package Scout. 40 package. 41 The structure was optimized and then the harmonic frequencies were calculated.…”

Section: Experimental Methodsmentioning

confidence: 99%

Infrared Spectroscopic Study of Vibrational Modes in Methylammonium Lead Halide Perovskites

Glaser

Müller

Sendner

et al. 2015

J. Phys. Chem. Lett.

323

317

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“…49 The data for the RF-PECVD a-Si:H layers 50 were extracted using SCOUT. 51 For LiF 52 and spiro-OMeTAD 8 we used data from literature.…”

Section: Simulation Methodsmentioning

confidence: 99%

Nanophotonic light management for perovskite–silicon tandem solar cells

Chen

Manley

2018

J. Photon. Energy

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Perovskite-silicon tandem solar cells are currently one of the most investigated concepts to overcome the theoretical limit for the power conversion efficiency of silicon solar cells. For monolithic tandem solar cells the available light must be distributed equally between the two subcells, which is known as current matching. For a planar device design, a global optimization of the layer thicknesses in the perovskite top cell allows current matching to be reached and reflective losses of the solar cell to be minimized at the same time. However, even after this optimization reflection and parasitic absorption losses occur, which add up to 7 mA/cm 2 .In this contribution we use numerical simulations to study, how well hexagonal sinusoidal nanotextures in the perovskite top-cell can reduce the reflective losses of the combined tandem device. We investigate three configurations. The current density utilization can be increased from 91% for the optimized planar reference to 98% for the best nanotextured device (period 500 nm and peak-to-valley height 500 nm), where 100% refers to the Tiedje-Yablonovitch limit. In a first attempt to experimentally realize such nanophotonically structured perovskite solar cells for monolithic tandems, we investigate the morphology of perovskite layers, which are deposited onto sinusoidally structured substrates.

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“…We selected subgroups based on factors shown to affect CAS performance in the literature or based on clinical knowledge. These factors included the following: sex (male or female), symptomatic status, [15][16][17][18][19][20] race (white or not white), type of CAS procedure (elective or nonelective), 14 age (66-69, 70-74, 75-79, or ≥80 years), 12,14,15,17,19,33 clinical trial enrollment status (enrolled or not enrolled), 16 and National Coverage Determination indication (high surgical risk with symptomatic carotid Median (IQR) 11 (7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17) No. of past-year nursing home visits…”

Section: Subgroupsmentioning

confidence: 99%

“…Also, little is known about the significance of patient characteristics, clinical indications, carotid stenosis characteristics, and center characteristics outside of the RCT setting 4,[7][8][9][10][11][12] or small prospective registry or single-center or dual-center studies [13][14][15][16] or how these characteristics affect CAS performance beyond the periprocedural period. 8, 10,[13][14][15][17][18][19][20] The objective of this study was to describe the incidence of outcomes overall and among subgroups of Medicare beneficiaries undergoing CAS.…”

mentioning

confidence: 99%