Here is a list of World’s Tallest Buildings till date and have been listed according to the heights (Tallest first).
Here is a short article which discusses about the glasses used in Burj Khalifa for solar and thermal control. http://www.glazette.com/solar-&-thermal-control-glasses-in-burj-khalifa-194.html
Burj Khalifa is the tallest building ever existing on the Earth having a height of 828m (2717 ft). The construction of this tallest skyscraper started on 21st September, 2004 and got complete on 1st October, 2009.