Lanthanide ion doping enabling highly sensitive and stable all-inorganic CsPbI2Br perovskite photodetectors

We introduce Ln 3+ ions into all-inorganic CsPbI 2 Br films. Photodetectors based on CsPbI 2 Br:Yb 3+ films achieve a D * of 4.6 × 10 12 Jones, a detection range of 300–700 nm, quick response time (640 ns) and good stability.