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Light Emission

In the light-emitting subgroup, we focus on the design, fabrication and characterisation of emerging light-emitting devices. We employ advanced modelling tools to simulate light-matter interactions and find the best device architectures relevant for target needs: enhanced emission, better colour purity, control over directionality, etc. We interact closely with the materials and spectroscopy subgroups, making use of novel semiconductors and spectroscopic findings to fabricate devices with improved functionalities. Our approach seeks to find the optimum emitters in order to cover the entire visible spectrum, primarily blue, green, and red colours, with the ultimate goal of demonstrating efficient systems for white-lighting and sufficient light amplification for lasing. To this end, we have developed imaging tools that allow us to identify and quantify electroluminescence heterogeneities on the nanoscale and compare those with their photoexcited counterparts.[1] We also have a range of techniques to quantify photo- and electro-luminescence quantum yields and spectral features on both the macro- and micro-scale. These methodologies are key to understand the origin of performance losses and develop new strategies to overcome those losses.

 

 

 

 [1] Anaya, M.; Rand, B. P.; Holmes, R. J.; Credgington, D.; Bolink, H. J.; Friend, R. H.; Wang, J.; Greenham, N. C.; *Stranks S. D. Best Practices for Measuring Emerging Light-Emitting Diode Technologies Nat. Photon. 201913818-821