研究目的
Investigating the fabrication and optical waveguiding properties of dual-color emitting DCM-perylene micro-heterostructures for integrated nano-photonic and optoelectronic device structures.
研究成果
The sequential sublimation technique at ambient pressure successfully produced DCM-perylene MHS with well-defined crystalline facets and superior optical waveguiding properties. These MHS can emit dual-color outputs (red and yellow) depending on their geometry and excitation positions, making them promising for integrated nano-photonic and optoelectronic applications. The study highlights the potential of vapor-phase epitaxial growth for fabricating organic MHS with tailored optical properties.
研究不足
The study is limited by the need for precise control over the sublimation temperature to selectively grow the a-perylene polymorph and avoid the b-form. Additionally, the technique's applicability to other molecular systems and scalability for industrial applications were not explored.
1：Experimental Design and Method Selection:
The study employed a sequential sublimation technique at ambient pressure for the epitaxial growth of DCM-perylene micro-heterostructures (MHS). This method was chosen over solution-based self-assembly due to its ability to produce MHS with superior morphology and optical properties.
2：Sample Selection and Data Sources:
High-purity DCM and perylene were used to grow MHS. The study compared MHS grown via solvent-assisted self-assembly and vapor-phase epitaxial growth.
3：List of Experimental Equipment and Materials:
A heating-plate, clean coverslips, and glass stands were used for the sublimation process. Optical microscopy and field-emission scanning electron microscopy (FESEM) were employed for characterization.
4：Experimental Procedures and Operational Workflow:
DCM micro-rods were first grown at 175°C, followed by the facet-selective growth of a-perylene micro-squares on the micro-rods at 135°C. The optical waveguiding properties were studied using single-particle micro-spectroscopy with a 405 nm laser.
5：Data Analysis Methods:
The optical properties of the MHS were analyzed through UV/Vis-NIR absorbance and emission spectra, and the waveguiding properties were assessed by examining the fluorescence outputs at different excitation positions.
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