Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 15, Pages 12878-12885Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b02236
Keywords
micromolding in capillaries; imprint lithography; organic/inorganic hybrids; photoluminescence; high aspect ratio
Funding
- Netherlands Organisation for Science NWO [022.005.006]
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The application of luminescent materials in display screens and devices requires micropattemed structures. In this work, we have successfully printed microstructures of a two-dimensional (2D), orange colored organic/inorganic hybrid perovskite ((C6H5CH2NH3)(2)PbI4) using two different soft lithography techniques. Notably, both techniques yield microstructures with very high aspect ratios in the range of 1.5-1.8. X-ray diffraction reveals a strong preferential orientation of the crystallites along the c-axis in both patterned structures, when compared to nonpatterned, drop-tasted thin films. Furthermore, (time-resolved) photoluminescence (PL) measurements reveal that the optical properties of (C6H5CH2NH3)(2)PbI4 are conserved upon patterning. We find that the larger grain sizes of the patterned films with respect to the nonpatterned film give rise to an enhanced PL lifetime. Thus, our results demonstrate easy and cost-effective ways to manufacture patterns of 2D organic/inorganic hybrid perovskites, while even improving their optical properties. This demonstrates the potential use of color-tunable 2D hybrids in optoelectronic devices.
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