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  ______   _    _              _    _    __   __  
 /_   _// | || | ||     ___   | || | ||  \ \\/ // 
 `-| |,-  | || | ||    /   || | || | ||   \   //  
   | ||   | \\_/ ||   | [] || | \\_/ ||   / . \\  
   |_||    \____//     \__ ||  \____//   /_//\_\\ 
   `-`'     `---`       -|_||   `---`    `-`  --` 
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Text this: Tandem organic light-emitting diode