About 40 years later Charles Fritts, an American inventor, built the first solar cell. Made with selenium and a thin layer of gold, the device was less than 1% efficient.

40年之后，美国发明家查尔士•弗里兹(Charles Fritts)用硒和薄金片制造出第一枚光能电池，发电效率低于1%。

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Within the solar cell, the dye is paintedin a thin layer on a porous titanium dioxide scaffold to collect light and, ina series of steps, create power.

在太阳能电池内，染料涂在多孔的二氧化钛支架上来收集光线，然后经过一系列步骤，就产生了电流。

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Tang's team was inspired by the simplicity of eggshells; how a single cell was protected by a thin mineral layer.

唐的团队从简单的蛋壳中得到启发：一个单细胞是如何用一种薄的矿物质层保护的。

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He then wants to take moulded sheets of artificial skin to build up the intermediate layer, the dermis, before adding the outer epithelium graft employing new approaches that lift thin, 20-cell-thick slices from elsewhere on the body.

BBC: US Army seeks new ways to treat facial skin injuries