This study was supported by the National Basic Research Program of China (2010CB731801), the National High-tech R & D Program of China (2009AA121404), the National Natural Science Foundation of China
We propose a kind of Yb2?–Yb3?-codoped glass,which is used as spectral converter layer to adjust AM1.5 solar spectrum for a better match with silicon bandgap.T
Oct4 is mainly expressed in embryonic stemcells (ESCs), gerrnline stem cells, and embryonal carci-noma cells (ECCs) and plays an indispensable role inmaintaining th