Field effect white and tunable electroluminescence from ion beam synthesized Si- and C-rich SiO2 layers

O. Jambois (1) , Josep Carreras (1) , A. Perez-Rodriguez (1) , B. Garrido (1) , Caroline Bonafos (2) , Sylvie Schamm-Chardon (2) , Gérard Benassayag (2)

1 EME/CeRMAE/IN2UB Universitat de Barcelona
2 CEMES - Centre d'élaboration de matériaux et d'études structurales

White and tunable electroluminescence has been obtained by field effect injection in 40nm thick Si- and C-rich SiO2 layers. The films, synthesized by ion implantation, contain Si and C-rich nanoparticles embedded in SiO2 which were formed by annealing at 1100°C. Shifting of the distribution of C-related centers toward the interface region with the substrate allows us to obtain a characteristic white electroluminescence emission under pulsed excitation conditions. Moreover, an evolution of the emission spectrum from white to red is observed by changing the frequency of the pulse. A power efficiency higher than 10−3% is estimated. This work opens interesting perspectives on color tunability of field effect electroluminescent devices.

Domaines: Physique [physics]

O. Jambois, Josep Carreras, A. Perez-Rodriguez, B. Garrido, Caroline Bonafos, et al.. Field effect white and tunable electroluminescence from ion beam synthesized Si- and C-rich SiO2 layers. Applied Physics Letters, 2007, 91 (21), pp.211105 - 253124. ⟨10.1063/1.2807281⟩. ⟨hal-01745044⟩