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Kevin's Project Page - RISE summer 2003 |
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Intern: Kevin Herlihy, UCSB
Mentor: Vojislav Sradnov
Faculty Supervisor:
Department: Chemistry and Biochemistry |
ORGANIC LIGHT EMITTING DIODE (OLED) SYNTHESIS
The main goal this summer was to create a working OLED. To do this, vacuum
chambers were utilized to deposit the organic molecules Alq3 and TPD as well
as aluminum onto a glass slide covered with ITO. Later versions of the device
will include a layer of red light emitting organometallic molecule containing
europium. The vacuum chambers, reaching 10^-7 mBar, were first utilized to
calibrate the deposition of each material. Once this was done, the proper rate
of deposition could be used to deposit the correct amount of each molecule over
the surface of the device. In addition, masks were created using solid aluminum
plates to generate a defined layout for each deposition. These masks prevented
any electrical shorts that might have been created by contact between the two
electrodes ITO and aluminum. Once the simple OLED is successfully created,
more complicated versions of the same device are planned. Future devices will
harbor varying levels of each organic molecule which will be created by
close-range deposition. Multiple aluminum cathodes on the same device will
allow us to determine the optimal combination of organic molecule thicknesses.
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