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Published on: March 19, 2017
Highly-flexible perovskite photodiodes employing doped multilayer-graphene transparent conductive electrodes
Jong Min Kim1, Dong Hee Shin1, Suk-Ho Choi1
1Department of Applied Physics and Institute of Natural Sciences, Kyung Hee University, Yongin 17104, Republic of Korea.
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 (L n ) = 1 and 2 rather than 3 and 4, as analyzed by Raman scattering and sheet resistance. The photodiodes optimized at L n = 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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