Nano-flower 2,3-naphthalocyanine heterojunction for optoelectronic applications

Naphthalocyanine Thin Films and Field Effect Transistors

“…Dye molecules derivatised from phthalocyanine (Pc) and the larger analogue molecule, naphthalocyanine (Nc) have attracted much attention as candidate materials for photovoltaic devices, field effect transistors, gas sensing and organic spintronic devices [1][2][3][4][5][6][7][8][9][10][11][12][13] .…”

“…However, there have so far been very few studies of the properties of sublimed Nc thin films 11,14,15 ; in fact it has been suggested that Nc cannot be sublimed 13 , although the deposition of monolayer coverages have been reported by a number of groups [16][17][18][19][20][21][22] .…”

“…Dye molecules derivatized from phthalocyanine (Pc) and the larger analogue molecule naphthalocyanine (Nc) have attracted much attention as candidate materials for photovoltaic devices, field effect transistors, gas sensing, and organic spintronic devices. − The parent molecules are planar with a central conjugated ring system which can accommodate a metal center through the formation of coordination bonds. In the solid state the molecules stack face-to-face which leads to the formation of needlelike crystals.…”

“…Both molecules strongly adsorb light and the larger molecule, Nc, has a more extended π-conjugation system, resulting in an absorption edge at longer wavelength, in the infrared. Both molecules are highly insoluble, and there have been many studies of derivatives which have additional groups which can promote solubility. , Pc can be sublimed readily, and the resulting thin films have been incorporated into a wide range of organic devices. − , However, there have so far been very few studies of the properties of sublimed Nc thin films; ,, in fact it has been suggested that Nc cannot be sublimed, although the deposition of monolayer coverages has been reported by a number of groups. − Consequently it has not been possible to characterize systematically the properties of sublimed Nc thin films.…”

“…4,13 Pc can be sublimed readily, and the resulting thin films have been incorporated into a wide range of organic devices. [1][2][3]5 However, there have so far been very few studies of the properties of sublimed Nc thin films; 11,14,15 in fact it has been suggested that Nc cannot be sublimed, 13 although the deposition of monolayer coverages has been reported by a number of groups. 16−22 Consequently it has not been possible to characterize systematically the properties of sublimed Nc thin films.…”