Abstract
We first report highly-flexible perovskite photodiodes, using AuCl3-doped multilayer-graphene transparent conducting electrodes. The doping effect of the AuCl3 is more effective when the number of layers (Ln) = 1 and 2 rather than 3 and 4, as analyzed by Raman scattering and sheet resistance. The photodiodes optimized at Ln = 2 exhibit a 105 photo-/dark-current ratio, 0.4 AW−1 responsivity, 80% external quantum efficiency, 5.3 × 1010 cm Hz1/2/W detectivity, 90 dB linear dynamic range, and ∼1.1 μs response time. In addition, the photodiodes show excellent bending stabilities, maintaining a responsivity at about 70% of its initial value, even after 1000 bending cycles at a bending curvature of 4 mm.
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