Integration by self-aligned writing of nanocrystal/epoxy composites on InGaN micro-pixelated light-emitting diodes.
We report on the integration of monodisperse semiconductor nanocrystal (NC) color converters onto gallium nitride ultraviolet micro-pixelated light-emitting diodes ('micro-LEDs'). Integration is achieved in a 'self-aligned' process by forming a nanocomposite of the respective NCs in a photocurable epoxy polymer. Blue, green, yellow and red NC/epoxy blend microstructures have been successfully integrated onto micro-pixelated LEDs by this technique and utilised for color conversion, resulting in a five color emission single chip. Optical output power density of up to about 166 mW/cm2 is measured; spectral emission at 609 nm gives an estimated optical-to-optical conversion as high as 18.2% at 30 mA driving current.
Guilhabert
B
B
Institute of Photonics, University of Strathclyde, Glasgow, UK. benoit.guilhabert@strath.ac.uk
Elfström
D
D
Kuehne
A J C
AJ
Massoubre
D
D
Zhang
H X
HX
Jin
S R
SR
Mackintosh
A R
AR
Gu
E
E
Pethrick
R A
RA
Dawson
M D
MD
D017076:Computer-Aided Design; D003460:Crystallization / Q000379:methods; D004852:Epoxy Compounds / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005708:Gallium / Q000737:chemistry; D007204:Indium / Q000737:chemistry; D008029:Lighting / Q000295:instrumentation*; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation*; D015203:Reproducibility of Results; D012666:Semiconductors; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation
D004852:Epoxy Compounds; D007204:Indium; C473348:gallium nitride; D005708:Gallium; C513701:indium nitride