a team of researchers from the university of alberta and the national institute for nanotechnology has extended the operating life of an unsealed plastic solar cell, from 1 hours to eight months. the research groups' development of an inexpensive, readily available plastic solar cell technology hit a wall because of a chemical 2（用水蛭吸血） problem within the body of the prototype（原型，标准） . a chemical coating on an electrode was 3 and migrated through the circuitry（电路系统） of the cell.
the team led by u of a and nint chemistry researcher david rider, developed a longer 4, polymer（聚合物） coating for the electrode. electrodes are key to the goal of a solar energy technology, extracting electricity from the cell.
prior to the polymer coating breakthrough the research team's plastic solar cell could only operate at high capacity for about ten hours.
when rider and his research co authors presented their paper to the journal, advanced 5 materials, their plastic solar cell had performed at high capacity for 500 hours. but it kept on working for another seven months. the team says the unit eventually stopped working when it was damaged during 6 between laboratories.
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