Seminars
September 20, 2010
BJÖRN LÜSSEM 'Highly Efficient Organic Light Emitting Diodes'
BJÖRN LÜSSEM 'Highly Efficient Organic Light Emitting Diodes'
BJÖRN LÜSSEM
Seminar, September 20, 2010, 15:00. Seminar Room
BJÖRN LÜSSEM
Institute of Applied Photophysics
Technical University Dresden, GERMANY
BJÖRN LÜSSEM
Institute of Applied Photophysics
Technical University Dresden, GERMANY
Starting from a lab-curiosity, organic light emitting diodes have matured into a promising technology that is beginning to enter commercial markets. OLED displays can be found in a growing number of appliances such as mobile phones, mp3-players and TV-sets. For lighting applications several companies are planning to launch first products in the near future.
For both applications, OLED displays and OLED lighting, a high power efficiency is essential. In this presentation, the key parameters that determine the efficiency and methods to improve it are discussed. It will be shown how our doping technology [1] and the pin concept [2] lead to extremely low driving voltages and an internal efficiency close to 100%.
Special emphasis will be put on concepts for the generation of white light. For lighting applications, OLEDs can take advantage not only of their high power efficiency, but also of the good color quality and novel design possibilities such as illumination by flat light sources. New results on two approaches for highly efficient white OLEDs are presented: the all-phosphorescent concept and the triplet-harvesting approach [3,4].
Besides their high power efficiency the possibility to produce OLEDs on flexible substrates is a feature of OLEDs that significantly distinguishes them from most conventional lighting technologies. Thus, in the remainder of the presentation the design of top-emitting OLEDs on flexible metal substrates is discussed [5] and a short outlook will be given on the prospects of producing OLEDs in a low-cost vacuum-based roll-to-roll process.
Seminar, September 20, 2010, 15:00. Seminar Room
Hosted by Prof. Valerio Pruneri
For both applications, OLED displays and OLED lighting, a high power efficiency is essential. In this presentation, the key parameters that determine the efficiency and methods to improve it are discussed. It will be shown how our doping technology [1] and the pin concept [2] lead to extremely low driving voltages and an internal efficiency close to 100%.
Special emphasis will be put on concepts for the generation of white light. For lighting applications, OLEDs can take advantage not only of their high power efficiency, but also of the good color quality and novel design possibilities such as illumination by flat light sources. New results on two approaches for highly efficient white OLEDs are presented: the all-phosphorescent concept and the triplet-harvesting approach [3,4].
Besides their high power efficiency the possibility to produce OLEDs on flexible substrates is a feature of OLEDs that significantly distinguishes them from most conventional lighting technologies. Thus, in the remainder of the presentation the design of top-emitting OLEDs on flexible metal substrates is discussed [5] and a short outlook will be given on the prospects of producing OLEDs in a low-cost vacuum-based roll-to-roll process.
- [1] K. Walzer, B. Maennig, M. Pfeiffer, and K. Leo, Chem. Rev. 107, 1233 (2007).
- [2] R. Meerheim, B. Lüssem, and K. Leo, Proceedings of the IEEE 97, 1606 (2009).
- [3] S. Reineke, F. Lindner, G. Schwartz, N. Seidler, K. Walzer, B. Lüssem, and K. Leo, Nature 459, 234 (2009).
- [4] T. Rosenow, M. Furno, S. Reineke, S. Olthof, B. Lüssem, and K. Leo, submitted to Journal of Applied Physics
- [5] P. Freitag, S. Reineke, S. Olthof, M. Furno, B. Lüssem, and K. Leo, Organic Electronics in press. Online at http://dx.doi.org/10.1016/j.orgel.2010.07.017
Seminar, September 20, 2010, 15:00. Seminar Room
Hosted by Prof. Valerio Pruneri
Seminars
September 20, 2010
BJÖRN LÜSSEM 'Highly Efficient Organic Light Emitting Diodes'
BJÖRN LÜSSEM 'Highly Efficient Organic Light Emitting Diodes'
BJÖRN LÜSSEM
Seminar, September 20, 2010, 15:00. Seminar Room
BJÖRN LÜSSEM
Institute of Applied Photophysics
Technical University Dresden, GERMANY
BJÖRN LÜSSEM
Institute of Applied Photophysics
Technical University Dresden, GERMANY
Starting from a lab-curiosity, organic light emitting diodes have matured into a promising technology that is beginning to enter commercial markets. OLED displays can be found in a growing number of appliances such as mobile phones, mp3-players and TV-sets. For lighting applications several companies are planning to launch first products in the near future.
For both applications, OLED displays and OLED lighting, a high power efficiency is essential. In this presentation, the key parameters that determine the efficiency and methods to improve it are discussed. It will be shown how our doping technology [1] and the pin concept [2] lead to extremely low driving voltages and an internal efficiency close to 100%.
Special emphasis will be put on concepts for the generation of white light. For lighting applications, OLEDs can take advantage not only of their high power efficiency, but also of the good color quality and novel design possibilities such as illumination by flat light sources. New results on two approaches for highly efficient white OLEDs are presented: the all-phosphorescent concept and the triplet-harvesting approach [3,4].
Besides their high power efficiency the possibility to produce OLEDs on flexible substrates is a feature of OLEDs that significantly distinguishes them from most conventional lighting technologies. Thus, in the remainder of the presentation the design of top-emitting OLEDs on flexible metal substrates is discussed [5] and a short outlook will be given on the prospects of producing OLEDs in a low-cost vacuum-based roll-to-roll process.
Seminar, September 20, 2010, 15:00. Seminar Room
Hosted by Prof. Valerio Pruneri
For both applications, OLED displays and OLED lighting, a high power efficiency is essential. In this presentation, the key parameters that determine the efficiency and methods to improve it are discussed. It will be shown how our doping technology [1] and the pin concept [2] lead to extremely low driving voltages and an internal efficiency close to 100%.
Special emphasis will be put on concepts for the generation of white light. For lighting applications, OLEDs can take advantage not only of their high power efficiency, but also of the good color quality and novel design possibilities such as illumination by flat light sources. New results on two approaches for highly efficient white OLEDs are presented: the all-phosphorescent concept and the triplet-harvesting approach [3,4].
Besides their high power efficiency the possibility to produce OLEDs on flexible substrates is a feature of OLEDs that significantly distinguishes them from most conventional lighting technologies. Thus, in the remainder of the presentation the design of top-emitting OLEDs on flexible metal substrates is discussed [5] and a short outlook will be given on the prospects of producing OLEDs in a low-cost vacuum-based roll-to-roll process.
- [1] K. Walzer, B. Maennig, M. Pfeiffer, and K. Leo, Chem. Rev. 107, 1233 (2007).
- [2] R. Meerheim, B. Lüssem, and K. Leo, Proceedings of the IEEE 97, 1606 (2009).
- [3] S. Reineke, F. Lindner, G. Schwartz, N. Seidler, K. Walzer, B. Lüssem, and K. Leo, Nature 459, 234 (2009).
- [4] T. Rosenow, M. Furno, S. Reineke, S. Olthof, B. Lüssem, and K. Leo, submitted to Journal of Applied Physics
- [5] P. Freitag, S. Reineke, S. Olthof, M. Furno, B. Lüssem, and K. Leo, Organic Electronics in press. Online at http://dx.doi.org/10.1016/j.orgel.2010.07.017
Seminar, September 20, 2010, 15:00. Seminar Room
Hosted by Prof. Valerio Pruneri