All-Perovskite Photodetector with Fast Response

Perovskites have attracted substantial attention on account of their excellent physical properties and simple preparation process. Here we demonstrated an improved photodetector based on solution-processing organic-inorganic hybrid perovskite CH(3)NH(3)PbI(3−x)Cl(x) layer decorated with CsPbBr(3) perovskite quantum dots. The CH(3)NH(3)PbI(3−x)Cl(x)-CsPbBr(3) photodetector was operated in a visible light region, which appeared high responsivity (R = 0.39 A/W), detectivity (D* = 5.43 × 10(9) Jones), carrier mobility (μ(p) = 172 cm(2) V(−1) s(−1) and μ(n) = 216 cm(2) V(−1) s(−1)), and fast response (rise time 121 μs and fall time 107 μs). The CH(3)NH(3)PbI(3−x)Cl(x)-CsPbBr(3) heterostructure is anticipated to find comprehensive applications in future high-performance photoelectronic devices. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s11671-019-3082-z) contains supplementary material, which is available to authorized users.