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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ESPNtapes Fritts taking the winner's check from beaming Wal-Mart executives.

FORBES: No urinating on-camera, please

David Fritts, who occasionally sneaks a chew of Red Man from the leg pocket of his hip- waders, shed 60 pounds last year after urging from Wal-Mart FLW Tour organizers.

FORBES: No urinating on-camera, please

Fritts reaches down and hoists an easy 3-pounder overhead.

FORBES: No urinating on-camera, please