Abstract
In this work, a novel and straightforward technology for the fabrication of two-dimensional (2D) photoluminescent light source arrays by selective infiltration of conjugated luminescent polymers into three-dimensional (3D) silicon microstructures is presented. Poly(9,9-di-n-octylfluorene-alt-benzothiadiazole) (F8BT) integration into 3D silicon microstructures is investigated by means of three different deposition techniques, namely, spin-coating, dip-coating and drop-casting/slow solvent evaporation. The microstructure is fabricated by electrochemical micromachining (ECM) technology and integrates 2D arrays of square holes with different sizes (about 40 and 4 μm), spatial periods (about 70 and 10 μm), and aspect ratios (ARs) (about one and ten). Notably, square holes with higher AR can be selectively filled with polymer using spin-coating and drop-casting techniques, whereas dip-coating technique allows selective polymer filling of square holes with lower AR. Independently of size, period and AR, each polymer-infiltrated hole behaves as a single light source, thus enabling the effective synthesis of 2D photoluminescent light source arrays.
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References
G. Polito, S. Surdo, V. Robbiano, F. Cacialli, G. Barillaro. Two-dimensional array of photoluminescent light sources by selective integration of conjugated luminescent polymers into three-dimensional silicon microstructures. Adv. Optical Mater. 1 (12), 888–894 (2013)
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Barillaro, G., Polito, G., Surdo, S., Robbiano, V., Tregnago, G., Cacialli, F. (2015). Synergic Integration of Conjugated Luminescent Polymers and Three-Dimensional Silicon Microstructures for the Effective Synthesis of Photoluminescent Light Source Arrays. In: Compagnone, D., Baldini, F., Di Natale, C., Betta, G., Siciliano, P. (eds) Sensors. Lecture Notes in Electrical Engineering, vol 319. Springer, Cham. https://doi.org/10.1007/978-3-319-09617-9_43
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DOI: https://doi.org/10.1007/978-3-319-09617-9_43
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