I have made some DLTS measurements on GaN-based LEDs, but there are some peaks with unrealistic properties occur in the testing. Some are in the high temperature range, and some are in the low temperature range. For example ,there are two peaks in the temperature range of 295 K to 60 K as shown in the attachment. Among them, the negative peak at about 180 K is realistic, but the positive peak at about 120 K whose energy is 1.8 eV and the cross section is 1050 cm-2 is unrealistic. I have never seen such a large cross section. Why does this phenomenon occur?
How can you determine whether a spectal peak is 'unrealistic' if you measured it? You may not understand its formation but then either the model you seem to have may be no good or the experimental procedure you used may be flawed.
Thomas Walther Thanks for your answer. The "unrealistic" refers to the overlarge cross section which is 1050cm-2.
I see, but this does not come directly from the data. It's the result of you analysing the data based on a model. This interpretation may be incorrect.
Thomas Walther Thanks, and it is really helpful. I will update the analysis software.
- Badges
- Science topic
- Similar topics
- Developmental Psychology
- Attachment