Effects of Light Soaking Conditions on Thin Film Silicon:Hydrogen Alloy Solar Cells

1986 ◽  
Vol 70 ◽  
Author(s):  
D. R. Willett ◽  
D. P. Tanner ◽  
G. Mchenry
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Light Intensity ◽  
Environmental Conditions ◽  
Operating Temperature ◽  
Measurable Effect ◽  
The Stability ◽  
Long Term Performance ◽  
Term Performance

ABSTRACTVariation of environmental conditions during light soaking of thin film silicon:hydrogen alloy (TFS) solar cells can have measurable effect on durability. Such sensitivity must be considered in optimizing processes for maximizing long-term performance. This paper will describe the effects of operating temperature, light intensity, operating bias, and duration of light soaking on the stability of TFS p-i-n solar cells.

Selecting the band gap for best long-term performance of a-Si:H solar cells

1991 ◽  
Author(s):  
X. Xu ◽  
M. Kotharay ◽  
N. Hata ◽  
J. Bullock ◽  
S. Wagner
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Long Term Performance ◽  
Term Performance

Effect of Thickness and Annealing on Stress in Tantalum and Tantalum Nitride Thin Film Hard Coatings

1996 ◽  
Vol 436 ◽  
Author(s):  
Ranjana Saha ◽  
Rama B. Inturi ◽  
John A. Barnard
Keyword(s):  
Thin Film ◽  
Hard Coatings ◽  
Tantalum Nitride ◽  
Film Stress ◽  
Thin Film Stress ◽  
Stress Measuring ◽  
Long Term Performance ◽  
Term Performance ◽  
The Relationship

AbstractAn understanding of the relationship between stress and the other properties of thin films is extremely useful in the design of hard coatings for long term performance. In our earlier study, sputtered Ta and Ta(N) films were found to exhibit promising hard coating properties. For example, nano hardness as high as 30 GPa was observed in the nitride (pN2 = 0.100 mTorr) films. In this work, we study the variation in the stress in these films with respect to film thickness and annealing. Films in six different thicknesses (50, 250, 350, 500, 750, and 1000 nm) were deposited on oxide coated Si (111) wafers. Stresses in the films in the as-deposited state and as a function of temperature (300°C) were determined using a thin film stress measuring unit.

scholarly journals Can Accelerated Aging Procedures Predict the Long Term Behavior of Polymers Exposed to Different Environments?

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2688
Author(s):  
Mariaenrica Frigione ◽  
Alvaro Rodríguez-Prieto
Keyword(s):  
Environmental Conditions ◽  
Accelerated Aging ◽  
Environmental Parameters ◽  
Polymeric Materials ◽  
Vapor Condensation ◽  
Natural Exposure ◽  
Long Term Performance ◽  
Term Performance ◽  
Long Term Behavior

During their useful life, polymers are subject to degradation processes due to exposure to specific environmental conditions over long times. These processes generally lead to changes, almost always irreversible, of properties and performances of polymers, changes which would be useful to be able to predict in advance. To meet this need, numerous investigations have been focused on the possibility to predict the long-term performance of polymers, if exposed to specific environments, by the so called “accelerated aging” tests. In such procedures, the long-term behavior of polymeric materials is typically predicted by subjecting them to cycles of radiations, temperatures, vapor condensation, and other external agents, at levels well above those found in true conditions in order to accelerate the degradation of polymers: this can produce effects that substantially deviate from those observable under natural exposure. Even following the standard codes, different environmental parameters are often used in the diverse studies, making it difficult to compare different investigations. The correlation of results from accelerated procedures with data collected after natural exposure is still a debated matter. Furthermore, since the environmental conditions are a function of the season and the geographical position, and are also characteristic of the type of exposure area, the environmental parameters to be used in accelerated aging tests should also consider these variables. These and other issues concerning accelerated aging tests applied to polymers are analyzed in the present work. However, bearing in mind the limitations of these practices, they can find useful applications for rating the durability of polymeric materials.

Quantum dot-nanocarbon based hybrid solar cells with improved long-term performance

2016 ◽  
Vol 222 ◽  
pp. 34-41 ◽  
Author(s):  
Alfian F. Madsuha ◽  
Chuyen Van Pham ◽  
Ralf Thomann ◽  
Michael Krueger
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Hybrid Solar Cells ◽  
Long Term Performance ◽  
Term Performance

scholarly journals Strength Behavior of Lateritic Soil Treated with Alccofine

2019 ◽  
Vol 9 (1) ◽  
pp. 1995-1999
Keyword(s):  
Shear Strength ◽  
Structural Integrity ◽  
Soil Stabilization ◽  
Engineering Properties ◽  
Lateritic Soil ◽  
Weak Soil ◽  
The Stability ◽  
Long Term Performance ◽  
Term Performance

One of the factors that affect the long term performance of a structure is the strength of the underlying soil strata. Presence of weak soil strata beneath the structure will affect the structural integrity. So, enhancing the engineering properties of the weak soil results in the betterment of bearing capacity of the soil. Nowadays, for improving the stability of the weak soil, various soil stabilization techniques are adopted. This paper presents an investigation of using alccofine as a soil stabilizing agent. Variation in shear strength parameters and compaction parameters of the soil is studied by adding different percentages of alccofine 1101 such as 1%, 2%, 3%, 4%, and 5%. Test results revealed that at the optimal rate of alccofine 1101, the shear strength characteristic is increased by 53.71% after a curing period of 3 days.

Understanding the long-term performance of space-based solar cells

SPIE Newsroom ◽  
2014 ◽  
Author(s):  
Takeshi Ohshima ◽  
Shin-ichiro Sato ◽  
Taishi Sum ◽  
Tetsuya Nakamura ◽  
Mitsuru Imaizumi
Keyword(s):  
Solar Cells ◽  
Long Term Performance ◽  
Term Performance
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