Dr. Stephan Harkema Profile

Dr. Stephan Harkema

at Holst Ctr

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Publications (4)

Proceedings Article | 8 October 2014 Paper

Light management in flexible OLEDs

Stephan Harkema, Raghu Pendyala, Christian G. Geurts, Paul L. Helgers, Jack Levell, Joanne Wilson, Duncan MacKerron

Proceedings Volume 9183, 91831H (2014) https://doi.org/10.1117/12.2061777

KEYWORDS: Organic light emitting diodes, Thin films, Refractive index, Glasses, External quantum efficiency, OLED lighting, Thin film devices, Polymers, Reflectivity, Polarization

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Proceedings Article | 27 September 2013 Paper

Device reflectivity as a simple rule for predicting the suitability of scattering foils for improved OLED light extraction

Jack Levell, Stephan Harkema, Raghu Pendyala, Peter Rensing, Alessia Senes, Dirk Bollen, Duncan MacKerron, Joanne Wilson

Proceedings Volume 8829, 88291L (2013) https://doi.org/10.1117/12.2023021

KEYWORDS: Organic light emitting diodes, Reflectivity, OLED lighting, Light scattering, Scattering, Glasses, External quantum efficiency, Waveguides, Aluminum, Silver

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SPIE Journal Paper | 1 January 2011 Open Access

Optimization of the efficacy and angle dependence of emission of top-emissive organic light-emitting diodes on metal foils

Harmen Rooms, Dorothee Hermes, Stephan Harkema, Cristina Tanase, Ton van Mol, Paul Blom, Joanne Wilson

JPE, Vol. 1, Issue 1, 011024, (January 2011) https://doi.org/10.1117/12.10.1117/1.3590937

KEYWORDS: Organic light emitting diodes, Metals, Reflectivity, Optical microcavities, Reflection, Polymers, Light scattering, Instrument modeling, Refractive index, Light sources and illumination

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Proceedings Article | 27 August 2009 Paper

Large area ITO-free flexible white OLEDs with Orgacon PEDOT:PSS and printed metal shunting lines

Stephan Harkema, Sibe Mennema, Marco Barink, Harmen Rooms, Joanne Wilson, Ton van Mol, Dirk Bollen

Proceedings Volume 7415, 74150T (2009) https://doi.org/10.1117/12.825246

KEYWORDS: Organic light emitting diodes, Metals, Silver, Resistance, Glasses, Light sources and illumination, Polymers, Finite element methods, Printing, Measurement devices

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