Enabling Lambertian-Like Warm White Organic Light-Emitting Diodes with a Yellow Phosphor Embedded Flexible Film oleh Cheng-Chang Chen, Huang-Yu Lin, Cheng-Hung Li, Jin-Han Wu, Zong-Yi Tu, Li-Ling Lee, Ming-Shan Jeng, Chien-Chung Lin, Jwo-Huei Jou, Hao-Chung Kuo