V
Varatharajan Sivasubramaniam
Researcher at Münster University of Applied Sciences
Publications - 3
Citations - 280
Varatharajan Sivasubramaniam is an academic researcher from Münster University of Applied Sciences. The author has contributed to research in topics: Triphenylamine & Phosphorescent organic light-emitting diode. The author has an hindex of 3, co-authored 3 publications receiving 264 citations.
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Journal ArticleDOI
Fluorine cleavage of the light blue heteroleptic triplet emitter FIrpic
Varatharajan Sivasubramaniam,Florian Brodkorb,Stephanie Hanning,Hans P. Loebl,Volker Van Elsbergen,Herbert Friedrich Boerner,Ullrich Scherf,Martin Kreyenschmidt +7 more
TL;DR: In this article, the lifetime stability of devices containing FIrpic as emitter has been analyzed via liquid chromatography coupled with electron spray ionization mass spectrometry (LC/ESI/MS).
Journal ArticleDOI
Degradation of HTL layers during device operation in PhOLEDs
Varatharajan Sivasubramaniam,Florian Brodkorb,Stephanie Hanning,Oliver Buttler,Hans P. Loebl,Volker Van Elsbergen,Herbert Friedrich Boerner,Ullrich Scherf,Martin Kreyenschmidt +8 more
TL;DR: In this paper, the degradation mechanisms of blue light emitting diodes (OLEDs) during device operation were investigated using laser desorption ionization (LDI) coupled with a time of flight mass spectrometry (TOF/MS).
Journal ArticleDOI
Investigation of FIrpic in PhOLEDs via LC/MS technique
Varatharajan Sivasubramaniam,Florian Brodkorb,Stephanie Hanning,Hans P. Loebl,Volker Van Elsbergen,Herbert Friedrich Boerner,Ullrich Scherf,Martin Kreyenschmidt +7 more
TL;DR: The commercial breakthrough of phosphorescent organic white light sources is presently hampered due to the unavailability of a stable blue phosphorescent emitter material as discussed by the authors, and only few analytical investigations have been made regarding the chemical degradation of the PHE materials during the processing or the operation of the devices.