A new solar cell could go through the laundry and emerge still working. The photovoltaic cell, developed by Japanese research institution RIKEN and the University of Tokyo, is ultra thin and coated on both sides with waterproof film. The solar cell can be stretched or compressed or washed and continue to function.
Researchers in Japan have created a waterproof solar cell able to withstand a wash and keep on generating power. They developed flexible, super thin, organic photovoltaic cells based on PNTz4T, a material they developed in the past. Both sides of the cell were covered with an acrylic-based elastomer that allowed light to reach the cells, but prevented air and water from leaking on to them.
Source: http://inhabitat.com/waterproof-solar-cell-generates-power-even-after-it-gets-soaked/