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Organic materials are of great interest for use as electronic and optoelectronic devices. Currently, solar cells are in limited use, due to their relatively high cost. Solar cells based on organic semiconductors are promising as low-cost alternatives to current technologies; for example,
low cost printed solar cells may be possible. However, significant frequency ranges in the solar spectrum are not absorbed. Expanding the absorption-spectrum bandwidth for the organic materials by varying the band gap can lead to improved efficiency for solar cells based on organic semiconductor
inks. Here we test the possibility of using nanoparticles with different sizes to increase the absorption efficiency. Copper Phthalocyanine (CuPc) nanoparticles have been prepared by a Liquid–Liquid Interface Recrystallization Technique (LLIRCT), and deposited on substrates using
a dip-coater at room temperature. The size of the nanoparticles is measured by transmission electron microscopy (TEM). Particle size and morphology are mainly determined by the preparation time. Optical proprieties were measured using UV-VIS spectroscopy from 350 to 1000 nm. The spectra show
a shift in the peak positions as the particles become smaller. The band gap increases with the particle size.
Document Type: Research Article
Publication date: January 1, 2011
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For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.