Friday, February 20, 2009

Printing solar cells


From the world of technology, some news! Mitsubishi has broken its own photovoltaic cell efficiency record with the latest PV cells boasting 18.9 percent efficiency. Mitsubishi achieved its latest feat by using a patterned layer on the rear surface of the cell to reflect infrared solar rays onto the device. The same honeycomb-like pattern is on the front surface of the PV cell as well.

Australian scientists at CSIRO’s Victorian Organic Solar Cell Consortium (VICOSC) are working on a cheap way to print solar cells just like money. Trials will even be conducted by Securency International — a banknote printing company.

If you have been wondering why cell phones have not been going solar, Samsung and Chinese group ZTE have just unveiled their versions of such a mobile phone. The ZTE will be the world’s first low-cost solar-powered mobile phone targeted at the world’s poor yesterday, priced at under $40 (32 euros). The handset, called Coral-200-Solar, uses Dutch technology to boost the current from a single mini solar panel, which is located on the back of the phone. A charge of one hour in full sunlight will offer 15 minutes of talk time.

Samsung’s Blue Earth phone, with a touchscreen device has mini solar panels located on its back. Fully charging the phone via solar power takes between 10 and 14 hours and would offer 4 hours of chat time.

The Blue Earth is built from plastic harvested from used water bottles, according to Samsung. Also eco-friendly, the phone and high-efficiency charger contain zero toxic chemicals such as brominated flame retardants, beryllium, or phthalates. A built-in pedometer counts the user's steps and calculates many CO2 emissions said users has saved by walking instead of driving.

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