LG Display Co Ltd has unveiled an e-book equipped with solar cell, developed in-house. The thin-film solar cell featured in the e-book measures 10cm in width and length, and is developed to fit with the 6-inch display panel for e-books currently mass produced by the company. The solar cell measures 0.7mm in thickness and weighs 20g, which is thinner than a credit card and the weight of a fountain pen.
The thin-film solar cell is produced by placing electrodes onto a glass or plastic substrate. Contrary to widely adopted crystalline solar cells that employ silicon wafers, the thin-film solar cell is generally light-weight and easily adjustable in size and form for applications such as e-books or mobile phones.
The current energy conversion efficiency rate of this product is approximately 9.6%. Exposure to sunlight for about four to five hours would extend the running time of the e-book's battery by a day without the need for additional charging. This would allow longer outdoor use of the e-book and lessens worries about battery discharging.
Ki Yong Kim, head of the Solar Cell Office at LG Display, noted: "e-Books are attracting a lot of attention because they offer the advantage of storing thousands of books worth of content in an easy-to-carry device. The idea of e-books combined with solar cells will offer users the added benefit of longer usage. We will continue to provide users with enhanced convenience and value to solidify our lead in next-generation, environmentally friendly products."
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