All-inorganic bifacial CsPbBr3 perovskite solar cells with a 98.5%-bifacial factor.

We present here the construction of all-inorganic bifacial CsPbBr3 perovskite solar cells to harvest solar energy from both sides. The quantum dot modified bifacial device achieves front and rear efficiencies of 7.55% and 7.44% under one sun illumination, respectively. The solar cell without encapsulation retains around 95% of the initial efficiency at 60% RH over a period of 1000 h. [ABSTRACT FROM AUTHOR]