نتایج جستجو برای: absorber layer

تعداد نتایج: 289942  

Journal: :journal of optoelectronical nano structures 0
sayed mohammad sadegh hashemi nassab department ofelectrical engineering, fasa branch, islamic azad university, fasa, iran. mohsen imanieh department ofelectrical engineering, fasa branch, islamic azad university, fasa, iran. abbas kamaly department ofelectrical engineering, fasa branch, islamic azad university, fasa, iran.

the main problemswith the use of fossil fuels is the restrictions on their access and the detrimental consequences of their use which causes a threat to human health and quality of life. consequently, the use of other energy sources has become necessary. renewable energy as a permanent and clean energy source is an answer to this problem. one such energy source includes photovoltaic solar energ...

2015
Nikola Bednar Nadja Adamovic Alejandro Pérez-Rodríguez Philippe Lambin Takayoshi Kobayashi

In this paper we present an optical simulation of light management in Cu(In,Ga)Se2 thin-film solar cells with reduced absorber layer thickness, with the goal of absorption enhancement in the absorber layer. The light management was achieved by texturing of the substrate layer, and the conformal growth of all the following layers was assumed. Two texturing shapes have been explored: triangular a...

ایزدی‌فرد, مرتضی , عالی‌دائی, مریم , قاضی, محمدابراهیم ,

The CH3NH3PbI3 is one of the most widely used and famous lead halide perovskite absorber layer for using in perovskite solar cells. One of the ways to deal with the instability problem of this perovskite structure in environmental condition is bromide doping in this composition. In this work, the structural and optical properties of the bromide doped CH3NH3PbI3 absorber layers were studied as w...

M Basravi M Maddahali Zaker Hossein Firouzeh,

A broadband Circuit Analogue (CA) absorber using double-circular-loop array is investigated in this paper. A simple equivalent circuit model is presented to accurately analyze this CA absorber. The circuit simulation of the proposed model agrees well with full-wave simulations. Optimization based the equivalent circuit model, is applied to design a single-layer circuit analogue absorber using d...

J. Rashed-Mohassel M. Mehranpoura S. Jarchi,

In this paper, a compact plasmonic metamaterial absorber for terahertz frequencies is proposed and simulated. The absorber is based on metamaterial graphene structures, and benefits from dynamically controllable properties of graphene. Through patterning graphene layers, plasmonic resonances are tailored to provide a dual band as well as an improved bandwidth absorption. Unit cell of the design...

2016
G. Salvatella R. Gort K. Bühlmann S. Däster A. Vaterlaus Y. Acremann

Ultrafast demagnetization of ferromagnetic metals can be achieved by a heat pulse propagating in the electron gas of a non-magnetic metal layer, which absorbs a pump laser pulse. Demagnetization by electronic heating is investigated on samples with different thicknesses of the absorber layer on nickel. This allows us to separate the contribution of thermalized hot electrons compared to non-ther...

Journal: :ACS applied materials & interfaces 2016
Vera Steinmann Rupak Chakraborty Paul H Rekemeyer Katy Hartman Riley E Brandt Alex Polizzotti Chuanxi Yang Tom Moriarty Silvija Gradečak Roy G Gordon Tonio Buonassisi

As novel absorber materials are developed and screened for their photovoltaic (PV) properties, the challenge remains to reproducibly test promising candidates for high-performing PV devices. Many early-stage devices are prone to device shunting due to pinholes in the absorber layer, producing "false-negative" results. Here, we demonstrate a device engineering solution toward a robust device arc...

2015
Velmurugan

Solar air heater is a type of heat exchanger which transforms solar radiation into heat energy. The thermal performance of conventional solar air heater has been found to be poor because of the low convective heat transfer coefficient from the absorber plate to the air. It is attributed to the formation of a very thin boundary layer at the absorber plate surface commonly known as viscous sub-la...

Journal: :ماشین های کشاورزی 0
فاطمه نادی سامان آبدانان مهدی زاده اولدوز نورانی زنوز

introduction the significant of solar energy as a renewable energy source, clean and without damage to the environment, for the production of electricity and heat is of great importance. furthermore, due to the oil crisis as well as reducing the cost of home heating by 70%, solar energy in the past two decades has been a favorite of many researchers. solar collectors are devices for collecting ...

Journal: :Sensors 2016
Kyeong-seob Kim Dongju Lee Seunghyun Eom Sungjoon Lim

A stretchable metamaterial absorber is proposed in this study. The stretchability was achieved by liquid metal and polydimethylsiloxane (PDMS). To inject liquid metal, microfluidic channels were fabricated using PDMS powers and microfluidic-channel frames, which were built using a three-dimensional printer. A top conductive pattern and ground plane were designed after considering the easy injec...

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