In this study, we synthesized K3AlF6:Mn4+ phosphor by co-precipitation method. The crystal structure and photoluminescence properties were investigated. By surface modification of K3AlF6:Mn4+ using K3AlF6, the moisture resistance performances of the phosphor can be significantly improved. It was found that the luminescence performance of K3AlF6:Mn4+@K3AlF6, which was dispersed in water for 2 h, is unchanged but the uncoated  sample reduces dramatically. White light emitting diodes (WLEDs) based on the phosphor combined with commercial YAG:Ce3+ coated on a blue LED showed significantly improved of performance with color correlated temperature (CCT) from 5307 K down to 3528 K and color rendering index (CRI) from 64 up to 87. The results exhibit the potential for the application of K3AlF6:Mn4+@K3AlF6 as a red phosphor in warm WLEDs.

Transposition of the great arteries (TGA) is a complex cyanotic congenital heart disease, and only 10% of children with TGA can be alive through infancy. Rastelli operation is a standard surgical method for patient with TGA associated with ventricular septal defect (VSD) and pulmonary stenosis (PS). The aim of this report was to show short-term outcome of Rastelli operation in TGA; 3 patients (aged from 3 months to 4 years) were diagnosed TGA, VSD, atrial septal defect (ASD) and PS (2 severe pulmonary stenosis, 1 pulmonary atresia) with cyanosis, failure to thrive, baseline oxygen saturation values of 62% to 75%. All of 3 was performed Rastelli procedure and hospital discharged after 14 – 17 days postoperatively with saturation > 95%, no early complication, reoperation or death. Rastelli procedure in TGA  associated with VSD, ASD and PS is initially well performed at the department of Pediatric Cardiac Surgery, Cho Ray hospital with satisfactory short-time outcome