Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 18, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3021086
Keywords
barium compounds; defect absorption spectra; glass ceramics; nanostructured materials; photoluminescence; solar cells; time resolved spectra; titanium compounds; ultraviolet radiation effects; ytterbium compounds
Categories
Funding
- National Natural Science Foundation of China [50672087, 50802083, 60778039]
- National Basic Research Program of China [2006CB806007]
- National High Technology Program of China [2006AA03Z304]
- Changjiang Scholars and Innovative Research Team in University [IRT0651]
Ask authors/readers for more resources
We report on the conversion of near-ultraviolet radiation of 250-350 nm into near-infrared emission of 970-1100 nm in Yb3+-doped transparent glass ceramics containing Ba2TiSi2O8 nanocrystals due to the energy transfer from the silicon-oxygen-related defects to Yb3+ ions. Efficient Yb3+ emission (F-2(5/2)-> F-2(7/2)) was detected under the excitation of defects absorption at 314 nm. The occurrence of energy transfer is proven by both steady state and time-resolved emission spectra, respectively, at 15 K. The Yb2O3 concentration dependent energy transfer efficiency has also been evaluated, and the maximum value is 65% for 8 mol % Yb2O3 doped glass ceramic. These materials are promising for the enhancement of photovoltaic conversion efficiency of silicon solar cells via spectra modification.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
