Bandgap-tunable perovskite compositions are provided having the formula CsPb(A)xBy)3, wherein A and B are each a halogen. The mixed halide perovskite composition has a morphology which suppresses phase segregation to stabilize a tuned bandgap of the mixed halide perovskite composition. For example, the perovskite may be in the form of nanocrystals embedded in a non-perovskite matrix, which, for example, may have the formula Cs4Pb(A)xBy)6, wherein A and B are each a halogen. Solar cells and light-emitting diodes comprising the mixed perovskite compositions are also provided.
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机译：提供了具有能隙可调的钙钛矿组合物，其具有式CsPb（A）x Sub b B y y Sub 3），其中A和B各自为卤素。所述混合卤化物钙钛矿组合物具有抑制相偏析以稳定所述混合卤化物钙钛矿组合物的调谐带隙的形态。例如，钙钛矿可以是嵌入非钙钛矿基质中的纳米晶体的形式，其例如可以具有式Cs 4 Pb（A） x B y ）6，其中A和B各自为卤素。还提供了包含混合钙钛矿组合物的太阳能电池和发光二极管。
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