أرسل هذا في رسالة قصيرة: Improved photovoltaic performance of triple-cation mixed-halide perovskite solar cells with binary trivalent metals incorporated into the titanium dioxide electron transport layer

             ___     _    _     ______    ______  
    ___     / _ \\  | \  / ||  /_   _//  /_   _// 
   /   ||  | / \ || |  \/  ||   -| ||-   `-| |,-  
  | [] ||  | \_/ || | .  . ||   _| ||_     | ||   
   \__ ||   \___//  |_|\/|_||  /_____//    |_||   
    -|_||   `---`   `-`  `-`   `-----`     `-`'   
     `-`