Phosphor-free white light-emitting diodes*
Guo Xia†, Liu Qiao-Li, Li Chong, Liu Bai, Dong Jian, Shen Guang-Di
       
(a) I – V curves of hybrid integrated white LED and individual LEDs before bonding with a transparent conductive material. (b) EL spectra of the hybrid integrated white LED under current injection from 10 mA to 60 mA. (c) Chromatic coordinates of the hybrid integrated white LED under current injection ranging from 10 mA to 60 mA.