Alta Devices Achieves 30.8% Efficiency Record with Dual Junction Solar Cell Technology

Alta Devices reported that it has reached 30.8% solar cell efficiency with the company’s new dual junction solar cell. This new NREL (National Renewable Energy Laboratory) verified record has resulted from the company’s first implementation of a solar cell technology that uses a combination of a gallium arsenide (GaAs) base cell layer and an indium gallium phosphide (InGaP) absorber layer on top of the base cell. With higher efficiency, more electricity can be generated from smaller surface
areas. Alta plans to apply its efficient, thin and flexible mobile power
technology to extend the battery life of everyday products such as smartphones,
tablets, keyboards, mice, remote controls, etc…

Chris Norris, president and CEO of Alta Devices commented, “With our
technology, enough energy can be generated from sunlight to effectively power
devices in ways not previously possible. We are working with a number of
customers who are designing their mobile products to increase battery life; and
in some cases, we can provide enough energy to eliminate the need to plug into
the electric grid.”

Alta has created a calculator to compute the battery life extension for a
variety of consumer mobile devices (
According to the calculator, a typical outdoor worker could realize 80 percent
more battery life each day for their mobile phone. Or a student can get over 60
percent more battery life for his or her tablet device. These results can be
achieved with minimal weight or form-factor penalty on the device design. Alta
Devices is currently shipping its single junction technology.