| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10633701 | Optical Materials | 2005 | 5 Pages |
Abstract
Experiments and theoretical modeling are presented on the origin of efficient electroluminescence from boron implanted Si-LEDs. At low lattice temperatures two bound exciton traps created by high dose boron implantation were observed in the most efficient LEDs with external power efficiency above 0.12%. The temperature dependence of the correlation between the EL intensity from free and bound excitons is analyzed by a rate equation model. This analysis reveals that the bound excitons have a unique characteristic of a low recombination rate. The enhancement of EL from free electron-hole pairs with increasing temperature is due to the thermal activation of carriers from bound exciton traps.
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Authors
J.M. Sun, T. Dekorsy, W. Skorupa, A.Mücklich A.Mücklich, B. Schmidt, M. Helm,