Date of Completion

2019

Document Type

Honors College Thesis

Department

Physics

Thesis Type

Honors College, College of Arts and Science Honors

First Advisor

Dr. Matthew S. White

Keywords

OLED, optoelectronic, optics, LED, optical microcavity

Abstract

The ability to change the emission spectrum of an LED device has traditionally only been possible through chemical changes to the emissive material or the addition of dopants. Both of these techniques have significant disadvantages due to the limited range of changes possible and the difficulty of precisely controlling these changes. We present a technique of controlling the emission spectrum of a device through modification of device thickness alone. By placing reflective electrodes on either side of an LED device, we generate an optically resonant microcavity whose properties impact the emission profile of the device. The direct relationship between the cavity thickness and the peak emission wavelength allows for tuning of the peak emission to within the resolution of our ability to deposit films. The resonance cavity amplification also significantly narrows the emission spectra of OLED devices. We additionally explore the impacts of stacking multiple microcavities on top of one another in the emission profile in the hopes of generating devices with the potential of reaching the lasing threshold through electrical pumping.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

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