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Hole-Confining Concept for Blue Organic Light Emitting Diode

Darade, Balasaheb S.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321370334

Abstract Details

2011, MS, University of Cincinnati, Engineering and Applied Science: Electrical Engineering.
Organic Light Emitting Diodes (OLEDs) have received wide attention in recent years because of their advantages of light-weight, wide viewing angle, self-emission and promise of low cost. There is continuous increase in demand for OLEDs applications particularly in solid state lighting and color displays. With such huge potential there is also an urgent need for more research in improving efficiency and lifetime. Blue OLEDs are the bottleneck in both of these important performance parameters among three primary colors (green, red and blue). The main objective of this thesis was to implement blue OLEDs and improve their efficiencies and lifetimes by using a novel ‘hole-confining’ structure. Generally, in organic semiconductors, the hole mobility is higher than electron mobility by few orders of magnitude. This mismatch of electron and hole mobilities is detrimental because it leads to a lower recombination rate and leads to a degradation in device performance. In this thesis, we used the concept of a ‘hole confining’ structure to overcome this challenge. This helps enhancing the recombination rate and the overall device performance. In chapter 2, a step by step description of the various OLED fabrication procedures is presented. Also different OLED devices made in the Spintronics and Nanoelectronics lab at the University of Cincinnati so far are discussed. In chapter 3, we implemented a blue OLED with a ITO/TPD/BCP/LiF/Al structure first, and then improved the OLED performance, by using a ITO/PEDOT:PSS/TPD/BCP/Alq3/LiF/Al structure resulting in a brighter blue OLED. This work was the first successful fabrication and characterization of blue OLEDs in Dr. Cahay’s lab. Finally, a comparison of all devices fabricated is presented, and suggestions for future work are offered.
Marc Cahay, PhD (Committee Chair)
Punit Boolchand, PhD (Committee Member)
Altan Ferendeci, PhD (Committee Member)
70 p.
Electrical Engineering
Organic Light Emitting Diode's; OLEDs; Blue OLEDs; Hole-confining

Recommended Citations

Citations

  • Darade, B. S. (2011). Hole-Confining Concept for Blue Organic Light Emitting Diode [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321370334

    APA Style (7th edition)

  • Darade, Balasaheb. Hole-Confining Concept for Blue Organic Light Emitting Diode. 2011. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321370334.

    MLA Style (8th edition)

  • Darade, Balasaheb. "Hole-Confining Concept for Blue Organic Light Emitting Diode." Master's thesis, University of Cincinnati, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321370334

    Chicago Manual of Style (17th edition)

ucin1321370334
1,121
© 2011, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.