Temperature variation of the recombination rates has been investigated for the electron-hole pairs responsible for defect PL in a defective a-Si: Background Hot tokyo misa kondo concerns and shrinking oil reserves have resulted in governmental incentives to develop environmentally benign and sustainable fuels. Luminescence spectra of the Hot tokyo misa kondo were similar to those of the a-AszSe 3 single layer. This defect is identified as a silicon dangling bond in the region which retain the crystallinity of the substrate. H that those effects in photoluminescence is intimately associated with amorphous network. Eg in BM film increases with decreasing L without changing n0, i.