Synthesis Aspects of Nanoporous and Quasi-One-Dimensional Thin Film Architecture Photoelectrodes for Artificial Photosynthesis

The energy of a Von Kármán circular plate is described by a nonlocal nonconvex one-dimensional functional depending on the thickness ε. Here we perform the asymptotic analysis via Γ-convergence as the parameter ε goes to zero.

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Numerical Investigation on Transient Conjugate Optical-Thermal Fields in Thin Films Irradiated by Moving Sources for Front Treatments

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.297-301.1439 ◽

2010 ◽

Vol 297-301 ◽

pp. 1439-1444

Author(s):

Nicola Bianco ◽

Oronzio Manca ◽

Daniele Ricci

Keyword(s):

Thin Film ◽

Maxwell Equations ◽

Film Structure ◽

Laser Source ◽

Transient Temperature ◽

Temperature Profiles ◽

Temperature Dependent ◽

Motion Direction ◽

One Dimensional ◽

Thermal Fields

In this paper a numerical analysis on two-dimensional transient of the combined optical-thermal fields caused by a moving Gaussian laser source in a multilayer thin film structure on a glass substrate is carried out. The workpiece is considered semi-infinite along the motion direction and its optical and thermophysical properties are assumed temperature dependent. The COMSOL Multiphysics 3.4 code has been used to solve the combined thermal and electromagnetic problem. In this way, the optical field is considered locally one-dimensional and Maxwell equations are solved in order to evaluate the absorption in thin film. Results, in terms of transient temperature profiles and fields, are presented for different Peclet numbers and thin film thicknesses.

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Effects of One-Dimensional Photonic Crystal on Thin Film Silicon Solar Cells

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.827.49 ◽

2013 ◽

Vol 827 ◽

pp. 49-53 ◽

Cited By ~ 1

Author(s):

Qi Wang ◽

Hai Na Mo ◽

Zi Qiao Lou ◽

Ke Meng Yang ◽

Yue Sun ◽

...

Keyword(s):

Thin Film ◽

Refractive Index ◽

Solar Cells ◽

Photonic Crystal ◽

Energy Conversion ◽

Conversion Efficiency ◽

Energy Conversion Efficiency ◽

One Dimensional ◽

Si Solar Cells ◽

Refractive Index Difference

We have designed lateral contact thin film silicon-based solar cells with and without one-dimensional photonic crystals as back surface field layer. The photonic crystal comprises a distributed Bragg reflector (DBR) for trapping the light. Simulations demonstrate that energy conversion efficiency and short circuit current ISCfor c-Si solar cells with the photonic crystal structure are increased to 21.11% and 27.0 mA, respectively, from 18.33% and 22.8mA of the one without photonic crystal. In addition, the effects of DBRs consisting of different materials are investigated in our simulations. When the refractive index difference between sub-layers of the DBR is larger, the forbidden band width is broader, the reflectance of the DBR is higher, and more photons are reflected and trapped into the active region, then the absorption efficiency and the energy conversion efficiency of the solar cell are both increased. The bigger the refractive index difference of the DBRs sub-layers is, the broader the forbidden band width is. In addition, a-Si solar cells with and without DBR are also discussed.

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