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  ______     ___      ______   __   __    _____   
 /_____//   / _ \\   /_   _//  \ \\/ //  |__  //  
 `____ `   | / \ ||    | ||     \ ` //     / //   
 /___//    | \_/ ||   _| ||      | ||     / //__  
 `__ `      \___//   /__//       |_||    /_____|| 
 /_//       `---`    `--`        `-`'    `-----`  
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Text this: Zinc Tin Oxide (ZTO) electron transporting buffer layer in inverted organic solar cell