工程学论文代写 New Development In Solar Cell

工程学论文代写 New Development In Solar Cell

Introduction

能源问题将是人类未来50年的10个关键问题之一。在目前的能源结构中，化石能源占所有能源化石形式的90%以上。然而，据预测，到21世纪，它的比例将下降到50%以下。此外，核电和可持续能源将逐步走上领先的。在风能、潮汐能、地热能、氢能和生物质能等各种形式的可持续能源中，太阳能提供了近一千倍的太阳能量。直到2009，太阳能电池产量达到600MW的印度，占全球总产量的32.9%。然而，安装的太阳能发电能力仅为40mW，即1.54%和印度的总生产能力的98%，这表明需求到国外。因此，它指出在新能源和可持续能源产业的发展，安装的太阳能发电能力Fourn印度应该达到20GW 2020。

目前，硅太阳电池占据光伏市场的多晶硅太阳能电池的主要份额的主导产品。然而，太阳能级硅的供应商主要分布在国外，包括美国、日本和德国。印度硅太阳电池的缺乏，而且巨大的投资和长期的建立厂房也成为进入市场的障碍。

Energy problem will be top one the 10 critical problems that humans in the coming 50 years. In present energy structure,fossil energy has taken up more than 90% among all energy fossil forms. However, it was predicted that by mid-21st century, the proportion of it would be reduced to below 50%. Moreover, nuclear power and sustainable energy would gradually take the lead. Among all forms of sustainable energy such as wind power, tide energy, geothermal energy, hydrogen energy, and biomass energy, solar energy provides nearly a thousand times of that the sun of all the other energy. Till 2009, solar cell production reached 2600MW in India, which occupies 32.9% of the total production worldwide. However the installed solar electricity capacity was only 40MW, namely 1.54% og the total production capacity of India, which indicated that 98% demands came abroad. Thus, it was pointed out in the New Energy & Sustainable Energy Industry Development Fourn that the installed solar electricity capacity of India should reach 20GW by 2020.

Nowdays, the silicon solar cells occupy the main share of the PV market of which polycrystalline solar cells are the leading products. However the suppliers of solar scale silicon are mainly located abroad including USA, Japan, and Germany. The lack of silicon solar cells in India, moreover the huge investment and long period for establishing a plant also becomes a barrier to enter the market.

New concepts and new trends for solar cells

Solar cell is developing more and more new concepts have been brought forward. Some of them have been proven to be the new trends or directions for solar cell to be further improved. By far, the new concepts and new trends are divided into the following aspects: thin film solar cell, flexible solar cell, tandem solar cell, and other new conception solar cells.

Thin Film Solar Cell

Thin Film solar cells and panels now allow for several types of application to be introduced into the market including solar backpacks, solar thin film clothing and athletic apparel. We at Silicon Solar have taken these methods to the extreme and receive requests from customers who give us incentive and constructive feedback on developing new ways of utilizing this technology not only for them, but for you as well. Each flexible solar panel can be rolled up to 2 inches in diameter, making the paper thin solar cell one of the most durable and long lasting solar modules on the market.

工程学论文代写 New Development In Solar Cell

Flexible Solar Cell

. Solar technology has reached its most convenient, lightweight form: the newly-engineered flexible solar panel. Silicon Solar is the proud carrier of over 50 modules of flexible solar panels, offered in a variety of sizes.

Through recent developments, Silicon Solar has provided ways of listing thin, light weight, flexible solar panels allowing for multiple applications to now be solar accessible that never were before. It is possible to deposit thin layers of silicon onto flexible substrates, such as polyethylene terephthalate (PET). The silicon is able to bend along with the flexible PET substrate without compromising structure because the silicon layers are only micrometers thick. They are capable of being flexible because of the production process used: thin film deposition.

Tandom Solar Cell

A 25cm square prototype Tandem Cell in front

of the laboratory artificial sunlight source

lThe Tandem Cell consists of two photo-catalytic cells in series: the front cell absorbs the high energy ultraviolet and blue light in sunlight, using nano-crystalline metal oxide thin films to generate electron-hole pairs. The longer wavelength light in the green to red region passes through the front cell and is absorbed in a Graetzel Cell producing electrical potential under nearly all light conditions The two cells are connected electrically and together provide the potential required to split the water molecules in the electrolyte. The Cell is fabricated from widely-available and cheap materials. We are developing processes to obtain high efficiency films in a usable form. The metal oxides are expected to be the limiting feature of Tandem Cellâ„¢ efficiency, but we also need to optimise all other aspects, including the counter-electrodes, the electrolytes and the mechanical design to maximise light gathering and hydrogen collection. The most expensive component of the Cells is currently the special glass, on which the nano-crystalline films are deposited.

Nano Solar Cell

They have a conversion efficiency of around 6.5%. However, they have a theoretical efficiency of 19.5%, so it'll increase as the technology matures. even at 6.5% efficiency, they are still very cost effective. The industry's first solar electricity panel specifically designed and developed for utility-scale solar power system deployment. Through its innovative product design, the panel significantly reduces the "balance-of-system penalty" that medium-efficient thin panels have conventionally carried relative to higher-efficiency (yet far more expensive) silicon panels.

Polymer Solar Cell

Polymer solar cells are a type of flexible solar cell. They can come in many forms including: organic solar cell (also called plastic solar cell), or organic chemistry photovoltaic cell that produce electricity from sunlight using polymers. There are also other types of more stable thin-film semiconductors that can be deposited on different types of polymers to create solar cells. This technology is relatively new, being actively researched by universities, national laboratories and several companies around the world.

Currently, commercial solar cells are made from a refined, highly purified silicon crystal, similar to the material used in the manufacture of integrated circuits and computer chips (wafer silicon). The high cost of these silicon solar cells, and their complex production process has generated interest in developing alternative photovoltaic technologies.

Hybrid Solar Cell

Hybrid solar cells combine advantages of both organic and inorganic semiconductors. Hybrid photovoltaics have organic materials that consist of conjugated polymers that absorb light as the donor and transport holes.[1] Inorganic materials in hybrid cell are used as the acceptor and electron transporter in the structure. The hybrid photovoltaic devices have a significant potential for not only low-cost byroll-to-roll processing but also scalable solar power conversion.