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OUR LATEST POSTS

18
Organic photovoltaic

Organic photovoltaic cells are a type of solar cell that uses polymeric materials to capture sunlight — show tremendous promise as energy conversion devices, thanks to key attributes such as flexibility and low-cost production.

But one giant hurdle holding back organic photovoltaic technologies have been the complexity of their power conversion processes, which involve separate charge formation and transport processes.

To manouver around this problem, a team of researchers in Japan has developed a method to determine the absolute value of the charge formation efficiency. The secret of their method, as they report in Applied Physics Letters, is the combination of two types of spectroscopy.Organic photovoltaic

The two types the team uses are photo-induced spectroscopy to determine the change in absorption after femtosecond photo-pulse excitation, and electrochemical spectroscopy to examine the absorption change due to charge injection.

“By qualitative analysis of the spectral change, we can deduce how many charges are produced by one photon — its charge formation efficiency,” said Professor Yutaka Moritomo, Institute of Materials Science at the University of Tsukuba.

Just how significant is this?

It’s a huge step forward, said Moritomo, and the team also discovered that the charge formation efficiency remains high (0.55) even at low temperatures (80 K).

“This was extremely surprising,” Moritomo said, since the positive and negative charges are strongly bound in an organic photovoltaic device as an exciton, a bound state of an electron and hole, which are attracted to each other by the electrostatic Coulomb force.

“Its charge formation was believed to be too difficult without a thermal activation process,” explained Moritomo. “But our work shows that the charge formation process of an organic photovoltaic device is purely quantum mechanical, and any theoretical model should explain the high charge formation efficiency at low temperatures.”

The team’s work will enable the high-throughput screening of organic materials for new organic photovoltaic devices. “Organic materials have several requirements, including high charge formation efficiency and high charge transport efficiency , so our method can be used to quickly screen the materials by charge formation efficiency,” Moritomo said.

Next for the team?

“Now that we have a method to determine the key physical parameter, charge formation efficiency, we’re exploring the interrelation between it and the nanoscale structure of the organic photovoltaic device to clarify the mechanism of the charge formation,” noted Moritomo.

2
Wind energy Spain

Scottish government approves build of Iberdrola wind farm

Spanish energy giants get the go ahead for wind farm in Scotland.

Spanish energy company Iberdrola said it received consent from the Scottish government to build 23 wind turbines at a site near the country’s western coast.

Through its subsidiary ScottishPower Renewables, the Spanish company said the wind farm at Dersalloch Hill will have a nominal capacity of up to 69 megawatts.

Plans were submitted in 2005, though Iberdrola said it had to overcome a series of “stringent” technical and environmental requirements before the Scottish government signed off on the plans.

In 2013, Spain produced over 20 percent of its energy with wind turbines

Scotland holds a referendum for independence from the United Kingdom next month. The government in Edinburgh said it could power its economy through revenue generated from reserves in the North Sea while using renewable energy resources to meet demands.

Iberdrola said it expects to commission a 389 MW wind farm off the Scottish coast later this year through collaboration with Danish energy company DONG Energy.Wind Power In Spain

The Spanish company said Wednesday its commitment to renewable energy projects in the whole of the United Kingdom is underpinned with its 1,600 megawatts of installed wind and marine energy projects.

 

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14

Why should we be doing everything possible to develop geothermal energy technologies.

The main reason is that this is a largely untapped area of tremendous alternative energy potential, as it simply taps the energy being naturally produced by the Earth herself. Massive amounts of power are present below the surface crust on which we move and have our being and basically all we need do is tap into it and harness it.

At the Earths’ core, the temperature is 60 times greater than that of water being boiled. The tremendous heat creates pressures that exert themselves only a couple of miles below us, and these pressures contain huge amounts of energy.

Superheated fluids in the form of magma, which we see the power and energy of whenever there is a volcanic eruption, await our tapping. These fluids also trickle to the surface as steam and emerge from vents. We can create our own vents, and we can create out own containment chambers for the magma and convert all of this energy into electricity to light and heat our homes.geothermal energy

In the creation of a geothermal power plant, a well would be dug where there is a good source of magma or heated fluid. Piping would be fitted down into the source, and the fluids forced to the surface to produce the needed steam. The steam would turn a turbine engine, which would generate the electricity.

There are criticisms of geothermal energy tapping which prevent its being implemented on the large scale which it should be. Critics say that study and research to find a resourceful area is too costly and takes up too much time. Then there is more great expense needed to build a geothermal power plant, and there is no promise of the plant turning a profit.

Some geothermal sites, once tapped, might be found to not produce a large enough amount of steam for the power plant to be viable or reliable. And we hear from the environmentalists who worry that bringing up magma can bring up potentially harmful materials along with it.

However, the great benefits of geothermal energy would subsume these criticisms if only we would explore it more. The fact that geothermal power is merely the energy of the Earth herself means it does not produce any pollutants.

Geothermal energy is extremely efficient—the efforts needed to channel it are minimal after a site is found and a plant is set up. Geothermal plants, furthermore, do not need to be as large as electrical plants, giant dams, or atomic energy facilities—the environment would thus be less disrupted. And, needless to say, it is an alternative form of energy—using it would mean we become that much less dependent on oil and coal.

Probably most importantly of all—we are never, going to run out of geothermal energy, and it is not a commodity that would continuously become more expensive in terms of real money as time passes, since it is ubiquitous.

Geothermal energy would be, in the end, very cheap, after investigation and power plant building costs are recouped.

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63

It seems that Japan have a new outlook on renewable energy with the new, ‘hydrangea solar cell’.

A solar cell that resembles a flower is offering a new take on green energy in Japan, where one scientist is searching for renewable energy that looks good.

In a country badly scarred by the tsunami-sparked nuclear disaster at Fukushima three years ago, the hydrangea-inspired solar offering is small beer alongside one of the world’s biggest offshore wind power farms now floating off the country’s east coast.

But Hiroshi Segawa, a professor at University of Tokyo’s Research Centre for Advanced Science and Technology, is hoping his dye-sensitised solar cell, which meshes floral beauty with cutting-edge technology, will brighten the scene.

Segawa’s Annabelle, named after a type of white hydrangea, is made up of flowery stained glass-like solar cells built into a latticed wood box modelled on traditional Japanese doors.

While the 20 centimetre (8 inch) wide box might make a pretty addition to a sunroom, it can also store enough energy to charge your smartphone twice.

The leaves generate electricity, which is stored in the flower. As the device charges up the petals turn increasingly blue. But as Annabelle discharges, those blue petals turn white, just like the real-life hydrangea.

renewable energy

‘Enjoyable energy’

“People do not have a very good image about things related to energy, such as nuclear power,” Segawa told AFP.

“Thermal power generation conjures up images of blistering hot dirty coal while solar panels take up a lot of space.

“Even wind power generation has problems with bird strikes and noise, but (Annabelle) doesn’t harm the environment.”

While Segawa is not expecting to topple the dominant silicon-based solar panels, he is hoping the fast-growing sector has room for “enjoyable energy” that adds a splash of colour to an otherwise drab industry.

Since the Fukushima nuclear disaster in 2011, Japan has been pushing to boost the use of alternative energy.

The country’s solar power generation is rapidly growing, but it still only represents a small share of the overall power mix.

In Japan, the share of power generated from renewable sources, excluding hydropower lags other developed economies at 4.7 percent of the total, far less than 10.4 percent in Britain or 20.1 percent in Germany, according to data from the International Energy Agency.

All of Japan’s nuclear plants were shuttered after the 2011 atomic accident — taking away a power source that once supplied more than one-quarter of the nation’s energy.

Despite Tokyo’s efforts to develop the solar sector, the weather —- particularly a lack of reliable sunlight — is among the factors holding back wider use.

But Segawa says Annabelle works even in weak indoor light.

It also has a myriad of design possibilities. Segawa has already experimented with a cell that looks like French President Francois Hollande and one of the computer-generated Japanese pop star Hatsune Miku.

“You can make solar cells out of animated characters, portraits of real people and lots of other stuff,” he said.

Source- Malaymailonline.com

1
EvikooTM Mp-s23000 II Solar Charger

EvikooTM Mp-s23000 II Solar Charger 23000mah USB External Rechargeable Portable Battery Pack for Laptop Cell Phone

The EvikooTM Mp-s23000 II solar charger has a li-polymer battery inside to store the energy,so you can recharger your mobile device quickly in any place when needed.
It is portable rechargeable solar battery ,provide power supply for notebook,laptop,cellphone,mobile phone,iphone,ipad,ipod,Galaxy Tab,most mobile phone,PSP,MP3,Mp4,GPS.

It’s convenient for travel,outside and with the charger it can be recharged by solar energy when it’s under the sun rays or in the environment with light strong enough and 12 hours is needed to fully charge the solar charger. If using the AC Adapter connect the adapter plug to the mobile power input port.

EvikooTM Mp-s23000 II Solar Charger

The EvikooTM Mp-s23000 II Solar Charger has a multiple safety protection system that ensures the devicies safety and protection from overcharge, over voltage,over current and short circuit.

Cautions before use
1.Charger the solar charger completely before the first time use
2.Before charging your electric device,please confirm the voltage of the electric device
3.Please make sure that use standard cable with appropriate speciation ,or it may lead to the mobile power damage

Specification:

1. Internal Battery type:Li-Polymer 5159115PL*6 battery
2. Input:DC 15-20V 1200mAh ; Output: DC 12V/16V/19V 3000mA USB 5V 2100mA
3. Solar charger:15V 150mA
4. Battery capacity:23000mAh
5. Dimention:8.74*5*0.83(in)
6. Weight:23(oz)
7. Standard Accessories:10pcs connectors for laptop; 10 pcs mobile phone connectors;1 USB cable,1DC cable,1 adapter

For More Information Click Here

6
Solio Xcellerator and HUB Battery Pack

The Solio Xcellerator and Hub Battery Pack + Solar Charger bundle delivers a rapid charge from the sun, even in low light conditions. This easy-to-operate charger can be powered up from either solar energy or from any USB port. It powers USB-rechargeable smartphones, tablets, e-readers, MP3 players, GPS watches, cameras, water purifiers, bike lights, headlamps and lanterns.

Apple output mode is optimized for Apple products; CTIA (Cellular Telecommunications Industry Association) output is optimized for most other devices. Simple and fast-charging 2,000mAh li-poly battery stores energy for up to 1 yr., making it a great addition to any emergency preparedness kit.

The easy-to-operate charger may be powered up from either solar energy or from any USB port. Simply plug into your electronic device and press a button to start charging; status-indicator LED on button shows the battery’s power level.

Solio Xcellerator and HUB Battery Pack

Approximate charge time for the HUB Battery Pack is 4 – 6 hrs. direct sunlight and just over 4 hrs. from the USB charging cable or from a power outlet. The high temperature-rated battery, internal heat-sink, white color and heat-dissipating design help ensure that the HUB operates in high heat of solar charging.

Fully charged battery offers 1.5 – 2 charges for smartphones, 50% charge for e-readers, 25% top-off for tablets and multiple charges for smaller battery capacity devices. Enjoy the confidence that your Solio Xcellerator and HUB Battery Pack will have power whenever and wherever you need it.

Available in black or white.

For More Information Click Here