Abstract
Conference Title: 2017 Conference on Lasers and Electro-Optics (CLEO) Conference Start Date: 2017, May 14 Conference End Date: 2017, May 19 Conference Location: San Jose, CA, USA We report an efficient strategy using extremely low-cost materials. Due to the excellent thermal insulation, a record thermal efficiency of ∼88% was obtained under one sun without concentration, corresponding to the evaporation rate of 1.28 kg/(m2·h).