# I-V Measurement System
## Introduction
An I-V curve measurement is performed by applying a series of voltages to the device. At each voltage, the current flowing through the device is measured. The supplied voltage is measured by a voltmeter connected in parallel to the device, and the current is measured by an ammeter connected in series. This voltmeter and ammeter can now be integrated to **SMU: Source Measure unit**, which has been used in this project.
## Measurement System GUI
The I-V Measurment system GUI can be shown as below:
It consists of four parts:
- **Block 1: Parameter Setting Region:** The parameters of the measurement system can be set here, including the **Maximum Voltage (mV)**, **Dwelling Time (s)**, **Minimum Voltage (mV)**, **Voltage Step (mV)**, **Delay Time (s)** and **Compliance Current ($\mu$A)**.
- **Block 2: Experimental Time Estimation Region:** The estimated time of the single measurement can be shown here. if a sequencer is used, the estimated time of the whole measurement can be shown here.
- **Block 3: Live Plot Region:** The live plot of the I-V curve can be shown here. Depending on the needs, the I-R, V-R can also be shown as required.
- **Block 4: Experiment Queue Region:** The experiment queue can be shown here. The experiment queue can be shown and loaded as required.
## I-V Measurement System Sample Video
The I-V Measurement System Sample Video can be shown as below:
[I-V Measurmenet System Sample Video](https://icloud.songchen.science/?/I-V/IV.mp4?p=t)
## I-V Measurement System Outlook
Additional features can be added to the I-V Measurement System, including:
1. **Sequencer:** The sequencer can be added to the I-V Measurement System, which can be used to perform a series of measurements.
2. **I-V, V-I switching by toggle button:** The I-V, V-I switching can be added to the I-V Measurement System, which can be used to switch the I-V, V-I measurement mode.
3. **Cyclic Voltammetry:** The cyclic voltammetry can be added to the I-V Measurement System, which can be used to perform the cyclic voltammetry measurement.