Figure 4
From: Solution-processed, Self-organized Organic Single Crystal Arrays with Controlled Crystal Orientation
Control of the crystal orientation by trench size on the substrate.
(a) Schematic diagram of the trench geometry defined by the length (L) and width (d). (b) Optical micrographs of samples after crystal growth for different L and a fixed W of 20 μm. The black arrows indicate the [100] direction of the C8-BTBT crystals. (c) Optical micrographs of samples with the different W and sufficiently large L. (d) Polarized optical micrograph of the longest crystal obtained. The length of the crystal was 685 μm.
