Cs<sub>2</sub>Ag<sub><i>x</i></sub>Na<sub>1−<i>x</i></sub>Bi<sub><i>y</i></sub>In<sub>1−<i>y</i></sub>Cl<sub>6</sub> perovskites approaching photoluminescence quantum yields of 100%
Distribution of the number of citations over years.