Abstract
Porous silicon (PSi) was doped by Er using electromigration from a solution and converted to Er-doped silicon-rich silicon oxide (SRSO:Er) by partial thermal oxidation at 600-950°C following densification at 1100°C in an inert atmosphere. Room-temperature photoluminescence (PL) at ≈1.5 μm is intense and decreases by less than 20% from 12 K to 300 K. The PL spectrum of SRSO:Er reveals no luminescence bands related to Si-band-edge - recombination, point defects or dislocations, and shows that the Er3+ centers are the most efficient radiative recombination centers. A light-emitting diode (LED) with an active layer made of SRSO:Er was manufactured using a pre-oxidation cleaning step to increase the quality of the interface between SRSO:Er and the top electrode. Room temperature electroluminescence at ≈1.5 μm was demonstrated.
Original language | English (US) |
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Pages (from-to) | 145-150 |
Number of pages | 6 |
Journal | Materials Research Society Symposium - Proceedings |
Volume | 486 |
State | Published - 1998 |
Externally published | Yes |
Event | Proceedings of the 1997 MRS Symposium - Boston, MA, USA Duration: Dec 1 1997 → Dec 3 1997 |
All Science Journal Classification (ASJC) codes
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering