Harnessing molecular photon upconversion at sub-solar irradiance using dual sensitized self-assembled trilayers

2017 ◽  
Vol 5 (23) ◽  
pp. 11652-11660 ◽  
Author(s):  
Tristan Dilbeck ◽  
Sean P. Hill ◽  
Kenneth Hanson
Keyword(s):  
Metal Oxide ◽  
Cross Section ◽  
Absorption Cross Section ◽  
Solar Irradiance ◽  
Oxide Surfaces ◽  
Absorption Cross ◽  
Generation Efficiency ◽  
Metal Oxide Surfaces ◽  
Photocurrent Generation ◽  
Self Assembled

Self-assembled trilayers on metal oxide surfaces are used to increase absorption cross section and photocurrent generation efficiency via triplet–triplet annihilation.

Alkyl Phosphate Monolayers, Self-Assembled from Aqueous Solution onto Metal Oxide Surfaces

Langmuir ◽  
2001 ◽  
Vol 17 (13) ◽  
pp. 4014-4020 ◽  
Author(s):  
R. Hofer ◽  
M. Textor ◽  
N. D. Spencer
Keyword(s):  
Aqueous Solution ◽  
Metal Oxide ◽  
Oxide Surfaces ◽  
Metal Oxide Surfaces ◽  
Alkyl Phosphate ◽  
Self Assembled

scholarly journals Synthesis of Aminopropyltriethoxysilyl-Substituted Imines and Amides

Molbank ◽  
10.3390/m1251 ◽  
2021 ◽  
Vol 2021 (3) ◽  
pp. M1251
Author(s):  
Surya R. Banks ◽  
J. Tanner Morningstar ◽  
Mark E. Welker
Keyword(s):  
Metal Oxide ◽  
Small Molecules ◽  
Self Assembled Monolayers ◽  
Oxide Surfaces ◽  
Metal Oxide Surfaces ◽  
Assembled Monolayers ◽  
One Step ◽  
Self Assembled

A series of small molecules containing aminopropyltriethoxysilyl-substituted imines and amides were synthesized so that they could potentially be incorporated into self-assembled monolayers (SAMs) on metal oxide surfaces. Simple one-step imine preparations and two-step amide preparations are reported here.

Order and Orientation in Self-Assembled Long Chain Alkanephosphate Monolayers Adsorbed on Metal Oxide Surfaces

Langmuir ◽  
2001 ◽  
Vol 17 (22) ◽  
pp. 7047-7052 ◽  
Author(s):  
Georg Hähner ◽  
Rolf Hofer ◽  
Irene Klingenfuss
Keyword(s):  
Metal Oxide ◽  
Oxide Surfaces ◽  
Metal Oxide Surfaces ◽  
Self Assembled ◽  
Long Chain

Intraband Absorption in Ge/Si Self-Assembled Quantum Dots

1999 ◽  
Vol 571 ◽  
Author(s):  
P. Boucaud ◽  
V. Le Thanh ◽  
S. Sauvage ◽  
T. Brunhes ◽  
F. Fortuna ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cross Section ◽  
Absorption Cross Section ◽  
High Vacuum ◽  
Chemical Vapor ◽  
Ultra High Vacuum ◽  
Absorption Cross ◽  
Mid Infrared ◽  
Intraband Absorption ◽  
Self Assembled

ABSTRACTMid-infrared intraband absorption in Ge/Si self-assembled quantum dots is reported. The self-assembled quantum dots are grown by ultra-high-vacuum chemical vapor deposition. The intraband absorption is observed using a photoinduced absorption technique. The mid-infrared absorption, which is in-plane polarized, is maximum around 300 meV. The absorption is attributed to a quantum dot hole transition between bound and continuum states. The absorption cross section is deduced from the saturation of the photoinduced intraband absorption. An inplane absorption cross section as large as 2 × 10−13 cm2 is measured for one dot plane.

scholarly journals Photoelectric absorption cross section of silicon near the bandgap from room temperature to sub-Kelvin temperature

AIP Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 025120
Author(s):  
C. Stanford ◽  
M. J. Wilson ◽  
B. Cabrera ◽  
M. Diamond ◽  
N. A. Kurinsky ◽  
...  
Keyword(s):  
Cross Section ◽  
Absorption Cross Section ◽  
Room Temperature ◽  
Absorption Cross ◽  
Photoelectric Absorption

scholarly journals Ultraviolet Absorption Cross-Sections of Ammonia at Elevated Temperatures for Nonintrusive Quantitative Detection in Combustion Environments

2021 ◽  
pp. 000370282199044
Author(s):  
Wubin Weng ◽  
Shen Li ◽  
Marcus Aldén ◽  
Zhongshan Li
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Absorption Cross Section ◽  
Elevated Temperatures ◽  
Uv Absorption ◽  
Energy Utilization ◽  
Quantitative Detection ◽  
Absorption Cross ◽  
Hot Gas

Ammonia (NH3) is regarded as an important nitrogen oxides (NOx) precursor and also as an effective reductant for NOx removal in energy utilization through combustion, and it has recently become an attractive non-carbon alternative fuel. To have a better understanding of thermochemical properties of NH3, accurate in situ detection of NH3 in high temperature environments is desirable. Ultraviolet (UV) absorption spectroscopy is a feasible technique. To achieve quantitative measurements, spectrally resolved UV absorption cross-sections of NH3 in hot gas environments at different temperatures from 295 K to 590 K were experimentally measured for the first time. Based on the experimental results, vibrational constants of NH3 were determined and used for the calculation of the absorption cross-section of NH3 at high temperatures above 590 K using the PGOPHER software. The investigated UV spectra covered the range of wavelengths from 190 nm to 230 nm, where spectral structures of the [Formula: see text] transition of NH3 in the umbrella bending mode, v2, were recognized. The absorption cross-section was found to decrease at higher temperatures. For example, the absorption cross-section peak of the (6, 0) vibrational band of NH3 decreases from ∼2 × 10−17 to ∼0.5 × 10−17 cm2/molecule with the increase of temperature from 295 K to 1570 K. Using the obtained absorption cross-section, in situ nonintrusive quantification of NH3 in different hot gas environments was achieved with a detection limit varying from below 10 parts per million (ppm) to around 200 ppm as temperature increased from 295 K to 1570 K. The quantitative measurement was applied to an experimental investigation of NH3 combustion process. The concentrations of NH3 and nitric oxide (NO) in the post flame zone of NH3–methane (CH4)–air premixed flames at different equivalence ratios were measured.

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