Abstract
We present evidence for long-range hydrogen motion in hydrogenated amorphous silicon (a-Si:H) under room-temperature illumination, by monitoring the changes in the Raman spectrum of an a-WO3 overlayer with illumination. We observe that illumination causes hydrogen to diffuse out of the a-Si:H layer into the a-WO3 layer. This hydrogen motion is observed to saturate after about 30 min when the a-Si:H is illuminated with 15 W/cm3 of the 514.5 nm laser line at room temperature. The amount of hydrogen that diffuses out of the a-Si:H layer is estimated semiquantitatively to be approximately 9 × 10-4 at. %.
Original language | American English |
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Pages (from-to) | 2686-2688 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 77 |
Issue number | 17 |
DOIs | |
State | Published - 2000 |
NREL Publication Number
- NREL/JA-590-29548