EXFOLIATION OF GRAPHITE

Ink-jet printed Polymer (P3HT)-nanocrystal (CdTe)-Graphene (G) Heterojunction Solar Cells Fabricated from the High Yield Exfoliation of Graphite



Ink-jet printed Polymer (P3HT)-nanocrystal (CdTe)-Graphene (G) Heterojunction Solar Cells Fabricated from the High Yield Exfoliation of Graphite

Ink-jet printed Polymer (P3HT)

These printers are not conventionally printed only on paper, but also film, textiles and more, applying ink with conductive properties or organic polymers to produce flexible printed electronics, photovoltaic structures, RFIDs, smart tags, sequences of genetic material or sensor chemical and biological among many other applications. The printing of organic electronics opens up new applications market alternatives to current silicon or inorganic applications, it is possible to cheaper production of substrates and devices thinner, lighter and more flexible.

The ink jet printing method is a suitable method in the field of functional impression, since it is a contact process without support. This makes it possible to print on media sensitive as in the case of printing of photovoltaic materials for solar panels. Besides it is cheaper than other materials deposition processes such as vacuum evaporation technology and spin coating as in the process waste, is generated barely materials. Due to the low-cost production of printed RFID transponders and their advantageous properties, the scope of RFID technology expands and applications that allow unthinkable until now with conventional RFID for cost reasons or because of the rigidity of the material.

OLED light sources do not emit heat because it transforms electrical energy into light energy efficiently. So it is possible to play this light source without burning. Getting white light has become a major challenge in research and development of OLED devices for lighting, due to the different performance of polymers that emit in the red, green and blue, the latter being the most problematic, which hinders the development of devices that emit white light.

The ink jet is known as the printing process the most flexible. The piezoelectric principle is used to generate droplets on demand. There is no loss of material and size of support is variable. However, control of deposition (dry and homogeneity) is still problematic and the layering printed. In the field, of solar cells aims to achieve large areas pixels instead of well-defined microscopic in size. So the Inkjet is being considered mainly for modules small, portable electric tools that enable low-charge consumer products such as phones or MP3 players (Cook, 2008).

These discrete types of applications are those that hit the market before, in so that you can review the operation of this technology in actual conditions. This has demonstrated the use of other methods deposition may be more promising than ink jet for mass production of plastic solar cells. The two most outstanding, consistent with the roll-to-roll, flexo printing are and, engraving (gravure), which can reach up to 50.000 productivity m 2 / H 100.000 m 2 / H, respectively (Hernandez, 2008).

Graphene (G)

One promising approach for the manufacture of solar cells that are cheap, light and flexible is the use of organic compounds instead of highly purified ...