New Formulation Could Lower LED Manufacturing Costs

by Julie S. on September 2, 2015

Light emitting diodes (LEDs) could soon be as affordable as incandescent bulbs thanks to a new formulation developed by Florida State University (FSU) researchers.  These low-temperature LEDs are the first-of-their-kind to combine organic and inorganic materials into a single layer that produce red, green or blue light—or combine all three for white LEDs.

New Formulation Could Lower LED Manufacturing Costs

The same layer can emit bright blue light with a slight adjustment to the formulation. Source: FSU

While the material has been used in solar panels for quite some time, it’s only recently been applied to LEDs. Until the researchers’ findings LEDs needed high-temperature processing and expensive substrates to achieve their high power.

The hybrid organic/inorganic material—organometal halide perovskite—can be deposited at room temperature on ultra-cheap glass substrates coated with indium tin oxide (ITO). Then, it’s annealed at just 140°F using a solid metal backplane. According to the researchers, the new process only requires the mixing of the organic polymer with the active inorganics, so it’s inexpensive as well as highly manufacturable.

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