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Kevin Bergemann Phones & Addresses

  • Ypsilanti, MI
  • Ann Arbor, MI
  • Fairfax, VA
  • Claremont, CA

Publications

Us Patents

Thermal Management Of Oled Devices

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US Patent:
2013029, Nov 7, 2013
Filed:
May 7, 2012
Appl. No.:
13/465942
Inventors:
Stephen R. Forrest - Ann Arbor MI,
Kevin Bergemann - Ann Arbor MI,
Assignee:
THE REGENTS OF THE UNIVERSITY OF MICHIGAN - Ann Arbor MI
International Classification:
H01J 7/24
H01J 9/00
US Classification:
313 46, 295921
Abstract:
An electrically powered light source can be constructed with an electroluminescent element operating essentially at room temperature while providing a useful amount of light. A thermal junction located between an OLED and a cover layer of an OLED device is configured to advantageously manage the steady-state temperature of the OLED. The thermal junction may be formed with a thermal resistance of 0.2 m·K/W or less. A distance across the junction may be 2 mm or less, and/or the junction may include a layer of material having a thermal conductivity of 0.1 W/m·K or greater.

Ultra-High Efficiency (125%) Phosphorescent Organic Light Emitting Diodes Using Singlet Fission

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US Patent:
2013024, Sep 19, 2013
Filed:
Mar 7, 2013
Appl. No.:
13/788107
Inventors:
Stephen R. Forrest - Ann Arbor MI,
Yifan Zhang - Ann Arbor MI,
Kevin Bergemann - Ann Arbor MI,
Assignee:
The Regents of the University of Michigan - Ann Arbor MI
International Classification:
H01L 51/50
US Classification:
257 40
Abstract:
An organic light emitting device (OLED) is provided. The OLED includes, an anode; a cathode; and an emissive layer disposed between the anode and the cathode. The emissive layer includes a singlet fission sensitizer and a triplet emitter. The singlet energy of the singlet fission sensitizer is equal to or greater than twice the triplet energy of the singlet fission sensitizer. The triplet energy of the triplet emitter is less than the triplet energy of the singlet fission sensitizer.
Kevin J Bergemann from Ypsilanti, MI, age ~35 Get Report