How Do You Determine the Energy Range from Interface State Density Measurements?

[shauqi]

Hello,

I will stress my life to think the idea of a Interface state Density (Dit). I understand the idea of solving the Interface State Density versus Energy distribution graph with given charge pumping measurement. I am very curious about how to get the range of energy by using rising and falling (pulse pattern) equation?.

I just got value of Dit when using maximum substrate current. It's getting from measurement condition. Howerver, I can not do a relation between energy distribution and trap state density cause Dit value I get from substrate current versus pulse base level graph. I guess I just don't understand the idea on how to create/relate between energy range(E-Ec) and Dit in order to solve a problem." ...

I apologize for the convuluted way I've asked this question. I think the problem is more that I'm confused to the extent that I don't even really know HOW to ask the question. So hopefully, if someone is patient enough with me...I can weed through this INterface State Density study.

 

[BigJDubs]

I think the problem is that I'm trying to solve for the range of energy by using a rising and falling (pulse pattern) equation, but I'm not sure how to create/relate between energy range(E-Ec) and Dit. I know that I have gotten the Dit value when using maximum substrate current, which was obtained from a measurement condition. However, I'm just not sure how this relates to the energy distribution and trap state density. I hope someone can give me some guidance on this topic. Thank you for your help!

 

[charng]

Hello,

Thank you for expressing your interest in the concept of Interface State Density (Dit). To answer your question, let me first explain what Dit is and how it is related to energy distribution.

Dit is a measure of the density of interface states at the interface between two materials, such as a semiconductor and an insulator. These states act as traps for charge carriers, affecting the performance of electronic devices. The energy distribution of these interface states is important because it can determine the behavior of the device.

To obtain the energy distribution, researchers often use charge pumping measurements, where a pulse pattern is applied to measure the substrate current. By analyzing the rising and falling equations of the pulse pattern, the range of energy (E-Ec) can be determined.

However, you mentioned that you are having trouble relating the energy distribution to Dit. This may be because the Dit value you obtained from the substrate current versus pulse base level graph is not directly related to the energy distribution. It is important to note that Dit is a measure of the overall density of interface states, while the energy distribution refers to the specific range of energy levels at which these states exist.

In order to solve this problem, it may be helpful to consult with other researchers who have experience in this area or to refer to relevant literature on the subject. Additionally, it may be beneficial to conduct further experiments to obtain more accurate data and to better understand the relationship between Dit and energy distribution.

I hope this helps clarify the concept of Interface State Density and its relation to energy distribution. Keep exploring and asking questions, and I'm sure you will gain a deeper understanding of this topic. Best of luck in your studies.