Text this: Emergence of impurity-doped nanocrystal light-emitting diodes

  _____      ___     _    _     _____    _    _   
 / ____||   / _ \\  | || | ||  |  ___|| | || | || 
/ //---`'  | / \ || | || | ||  | ||__   | || | || 
\ \\___    | \_/ || | \\_/ ||  | ||__   | \\_/ || 
 \_____||   \___//   \____//   |_____||  \____//  
  `----`    `---`     `---`    `-----`    `---`