DNA Bases Thymine and Adenine in Bio-Organic Light Emitting Diodes
CINCINNATI UNIV OH NANOELECTRONICS LAB
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We report on the use of nucleic acid bases NBs in organic light emitting diodes OLEDs. NBs are small molecules that are the basic building blocks of the larger DNA polymer. NBs readily thermally evaporate and integrate well into the vacuum deposited OLED fabrication. Adenine A and thymine T were deposited as electron-blockinghole-transport layers EBLHTL that resulted in increases in performance over the reference OLED containing the standard EBL material NPB. A-based OLEDs reached a peak current efficiency and luminance performance of 48 cdA and 93,000 cdm2, respectively, while T-based OLEDs had a maximum of 76 cdA and 132,000 cdm2. By comparison, the reference OLED yielded 37 cdA and 113,000 cdm2. The enhanced performance of T-based devices is attributed to a combination of energy levels and structured surface morphology that causes more efficient and controlled hole current transport to the emitting layer.
- Electrooptical and Optoelectronic Devices