Why when CuO is doped with Co, there are 2 linear lines. I need to explain why line 1 is used to determine Eg.
Dear Duong Duc Manh
I hope this message finds you well! I wanted to touch base regarding your observations on the band gap of CuO doped with Co. It’s fascinating to see how the introduction of Co influences the electronic structure of CuO, and I appreciate your efforts in analyzing this.
When you plot your data and notice the two distinct lines, it’s likely indicative of different electronic transitions occurring within the material. The two linear regions generally represent separate absorption processes. The lower energy line may correspond to transitions within the band structure of the doped CuO, while the higher energy line could be linked to indirect transitions or defects introduced by the doping process.
For determining the band gap (Eg), it’s essential to select the right line. Typically, the line that corresponds to the fundamental absorption edge is the one that indicates the energy transition between the valence band and the conduction band. In your case, Line 1 probably represents this intrinsic transition more accurately, highlighting where the primary electronic band gap is located. This choice is crucial for maintaining consistency in your analysis and comparisons with other materials.
I hope this clarifies your reasoning behind the observed data! If you have any further questions or need additional insights, please don’t hesitate to reach out. I’m here to help! 😊
Best regards,
Kaushik
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