Hole Transport Dynamics in Mixed Sequence DNA Can Vary with Salt Concentration: An Experimental and Theoretical Analysis

2010 ◽  
Vol 114 (48) ◽  
pp. 20821-20833 ◽  
Author(s):  
William B. Davis ◽  
Chad C. Bjorklund ◽  
Paul S. Cho
Keyword(s):  
Theoretical Analysis ◽  
Salt Concentration ◽  
Hole Transport ◽  
Transport Dynamics ◽  
Mixed Sequence

scholarly journals Real-Time Electron and Hole Transport Dynamics in Halide Perovskite Nanowires

Nano Letters ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 8701-8707
Author(s):  
Lisa Janker ◽  
Yu Tong ◽  
Lakshminarayana Polavarapu ◽  
Jochen Feldmann ◽  
Alexander S. Urban ◽  
...  
Keyword(s):  
Real Time ◽  
Hole Transport ◽  
Transport Dynamics ◽  
Halide Perovskite

Dynamics of Wide Bandwidth Semiconductor Lasers

1997 ◽  
Vol 08 (03) ◽  
pp. 377-416 ◽  
Author(s):  
Daniel Tauber ◽  
John E. Bowers
Keyword(s):  
Active Region ◽  
Semiconductor Lasers ◽  
High Speed ◽  
Dynamic Performance ◽  
Signal Propagation ◽  
Hole Transport ◽  
Transport Dynamics ◽  
Very High Frequencies ◽  
Device Operation ◽  
Made In

In this paper we summarize the most important recent advances and results in high speed diode lasers. These advances have primarily come about as a result of physical understanding of the properties that affect the dynamic performance of these lasers. A great deal of progress has been made in understanding the active region properties of such devices, including the electron and hole transport dynamics as well as the effect of active region doping and strain. At the very high frequencies characteristic of the highest speed lasers reported to date the microwave signal propagation becomes an important issue that can limit the laser bandwidth. The distribution of signals along the laser length due to these effects are discussed, analyzed, and measured, and conclusions about bandwidth and device operation are drawn from the analysis. All of these different issues are summarized in this paper from both a theoretical and experimental perspective. The laser structures that address and overcome the problems caused by such factors are presented along with the best results obtained to date.

Efficient inverted planar perovskite solar cells based on inorganic hole-transport layers from nickel-containing organic sol

2019 ◽  
Vol 12 (01) ◽  
pp. 1850088 ◽  
Author(s):  
Weina Zhang ◽  
Jie Tang ◽  
Jihuai Wu ◽  
Zhang Lan
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Transport Layer ◽  
Simple Solution ◽  
Hole Transport Layer ◽  
Solution Processed ◽  
Transport Dynamics ◽  
Nio Nanocrystals

Due to the rough surface of fluorine-doped tin oxide (FTO) conductive glasses, it is challenging to fabricate fully covered ultra-thin hole-transport layer (HTL) with thickness under 100[Formula: see text]nm by a simple solution-processed method. Yet, the quality of HTLs play a key role in determining photovoltaic performance of the inverted planar perovskite solar cells (PSCs) owing to their important functions for effectively extracting holes, blocking electrons, suppressing dark reaction, and so on. Here, we report a facile nickel-containing organic sol (Ni–Sol) route to fabricate fully covered 46[Formula: see text]nm thick NiO HTLs for efficient inverted planar PSCs. Comparing with the pre-synthesized NiO nanocrystals solution, the Ni–Sol is easier to spread around the rough outline of FTO to achieve higher surface coverage. Through optimizing the concentration of nickel-containing organic sol, the champion performance of the inverted planar PSCs can be achieved because of the high transparency and good hole-transport dynamics of the optimized NiO film. This work demonstrates the advanced Ni–Sol route for preparing efficient inverted planar PSCs by the simple solution-processed method.

Circularly polarized electroluminescence by controlling the emission zone in a twisted mesogenic conjugate polymer

2018 ◽  
Vol 6 (4) ◽  
pp. 726-730 ◽  
Author(s):  
Jin-Hyung Jung ◽  
Dong-Myung Lee ◽  
Jae-Hoon Kim ◽  
Chang-Jae Yu
Keyword(s):  
Theoretical Analysis ◽  
Matrix Method ◽  
Hole Transport ◽  
Transport Layer ◽  
Hole Transport Layer ◽  
Circularly Polarized ◽  
Conjugate Polymer

The measured g factor and the corresponding emission zone were evaluated by theoretical analysis based on the Müller matrix method by increasing the thickness of the hole transport layer (TPBi) in the twisted configuration of conjugate polymer (F8BT).

Theoretical Characterization of the Structural and Hole Transport Dynamics in Liquid-Crystalline Phthalocyanine Stacks

2009 ◽  
Vol 113 (43) ◽  
pp. 14102-14111 ◽  
Author(s):  
Y. Olivier ◽  
L. Muccioli ◽  
V. Lemaur ◽  
Y. H. Geerts ◽  
C. Zannoni ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Hole Transport ◽  
Transport Dynamics ◽  
Theoretical Characterization

scholarly journals Theoretical Analysis of Experimental Data of Sodium Diffusion in Oxidized Molybdenum Thin Films

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2479
Author(s):  
Orlando Ayala ◽  
Benjamin Belfore ◽  
Tasnuva Ashrafee ◽  
John Akwari ◽  
Grace Rajan ◽  
...  
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Theoretical Analysis ◽  
Grain Boundary ◽  
Diffusion Process ◽  
Substrate Temperature ◽  
Hole Transport ◽  
Growth Speed ◽  
Geometrical Shape ◽  
Sodium Diffusion

In this work, the diffusion process of sodium (Na) in molybdenum (Mo) thin films while it was deposited on soda lime glass (SLG) was studied. A small amount of oxygen was present in the chamber while the direct-current (DC) magnetron sputtering was used for the deposition. The substrate temperatures were varied to observe its effect. Such molybdenum films, with or without oxidations, are often used in thin film solar cells, either as back contact or as hole transport layers. Secondary ion mass spectrometry (SIMS) was used to quantify the concentration of the species. A grain diffusion mechanistic model incorporating the effect of grain and grain boundary geometrical shape and size was developed. The model was used to provide an in-depth theoretical analysis of the sodium diffusion in molybdenum thin films that lead to the measured SIMS data. It was observed that not only diffusion coefficients should be considered when analyzing diffusion processes in thin films but also the ratio of grain boundary size to grain size. Both depend on substrate temperature and directly affect the amount of diffused species in the film. The data were analyzed under the light of the film growth speed versus diffusion front speed, the effect of oxygen content, and the effect of substrate temperature on the overall diffusion process. The temperature inversely affects the ratio of grain boundary size and grain size and directly affects the diffusion coefficient, which leads to a preferable temperature at which the highest amount of alkali can be found in the film.

Direct measurement of hole transport dynamics in DNA

Nature ◽  
2000 ◽  
Vol 406 (6791) ◽  
pp. 51-53 ◽  
Author(s):  
Frederick D. Lewis ◽  
Xiaoyang Liu ◽  
Jianqin Liu ◽  
Scott E. Miller ◽  
Ryan T. Hayes ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Hole Transport ◽  
Transport Dynamics
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