| 초록 |
Control over morphology and crystallinity of perovskite materials is of key importance to enable high-performance optoelectronics. Here we report a template-free strategy for fabrication of granular perovskite wire-based photodetectors. Systematic investigations have shown their high photoconductive gain, responsivity and detectivity. Intriguingly, due to the interfacial energy difference depending on the aggregation position of the grains, a predominant aggregation with 1-D occurs, resulting in granular wires. We further show that granular perovskite wires can be selectively attached prepatterned electrode arrays to create independently addressable flexible photodetector arrays. The flexible photodetector arrays show distinct light mapping and high mechanical stability under bending conditions. The discovered rationale in this work can be utilized as guideline to design high-performance perovskite photodetectors and open a pathway for integrated electronic and optoelectronic systems. |
