Phosphor-free white light-emitting diodes*
Guo Xia†, Liu Qiao-Li, Li Chong, Liu Bai, Dong Jian, Shen Guang-Di
       
(a) Schematic conduction band diagram of RGB InGaN/GaN MQWs. (b) Schematic conduction band diagram of green and blue dual-wavelength InGaN/GaN MQWs.