I. Test Introduction

In the fields of materials science and electrochemistry, studying the C-F (Capacitance-Frequency) and C-V (Capacitance-Voltage) characteristics of materials at different temperatures is crucial for understanding their electrical properties and potential applications. To meet this research need, the GoGo Instruments Probe Hot/Cold Stage ECH600S is paired with the Shanghai CH Instruments 660E Electrochemical Workstation to build an admittance spectroscopy platform for conducting C-F and C-V tests under various temperature conditions.

II. Test Preparation

1. GoGo Instruments Probe Hot/Cold Stage ECH600S: Provides precise temperature control, enabling sample testing under different temperature conditions.

↑ GoGo Instruments Probe Hot/Cold Stage ECH600S ↑

Product Parameters and Features:

1. Temperature Range: -190~600°C;
2. Temperature Stability: ±0.1°C;
3. Temperature Ramp Rate: 0~30°C/min (supports setpoint/program segment control);
4. Sample Size: 23*23mm;
5. Current accuracy better than 0.1pA; Probe height has been upgraded for easier and more reliable probing.

2. Shanghai CH Instruments Electrochemical Workstation: Used for electrochemical testing and real-time recording and analysis of electrochemical parameter changes.

3. Sample Preparation

The material is an organic-inorganic perovskite. The basic device structure, from bottom to top, consists of TO glass / SnO₂ / perovskite layer / Spiro-OMeTAD / gold or silver.

III. Test Platform Setup

1. Equipment Connection and Calibration

First, connect the GoGo Instruments Probe Hot/Cold Stage ECH600S to the Shanghai CH Instruments 660E Electrochemical Workstation. Ensure all connections are secure. Preheat and calibrate the electrochemical workstation to guarantee the accuracy of the test results. Simultaneously, use the temperature control software provided with the probe hot/cold stage to set the temperature, ensuring stability and accuracy in temperature control.

2. Sample Placement

Place the sample to be tested on the sample stage of the probe hot/cold stage, ensuring good contact is formed between the sample and the probes. Select the appropriate probe configuration according to the experimental requirements. Then, set the parameters for the C-F and C-V tests on the electrochemical workstation, including the potential range, frequency range, etc., ensuring all settings meet the experimental requirements.

3. Admittance Spectroscopy Platform Setup

Integrate the functions of the electrochemical workstation and the probe hot/cold stage to build the admittance spectroscopy platform. Utilize the rapid data acquisition system and external signal input channels of the electrochemical workstation to record and analyze C-F and C-V data in real-time at different temperatures. Meanwhile, use the temperature control system of the probe hot/cold stage to precisely control temperature variations during the testing process, facilitating the study of temperature effects on the electrochemical properties of the material.

IV. Testing Process

1.Temperature Adjustment

Before starting the test, use the GoGo Instruments probe hot/cold stage to adjust and stabilize the temperature to the desired test level to avoid interference with the results.

2. C-F and C-V Testing

At the set temperature, perform the C-F test. Analyze the relationship between the material's capacitance characteristics and frequency by varying the frequency and recording the changes in capacitance value. Observe fluctuations in capacitance at different frequencies and note any significant frequency dependence.

At the same temperature, perform the C-V test. Analyze the relationship between the material's capacitance characteristics and voltage by varying the voltage and recording the changes in capacitance value. Observe the trends in capacitance change under different voltages and note any non-linearity or hysteresis phenomena.

3. Data Recording and Analysis

Record the test data and use the data processing software of the electrochemical workstation for analysis. Study the effect of temperature on the material's capacitive properties by comparing C-F and C-V curves obtained under different temperature conditions. Analyze the influence of temperature changes on parameters such as capacitance value, frequency dependence, and voltage dependence.

V. Test Conclusion

Using the admittance spectroscopy platform built with the GoGo Instruments Probe Hot/Cold Stage ECH600S paired with the Shanghai CH Instruments 660E Electrochemical Workstation, C-F and C-V tests were successfully conducted at different temperatures. This testing platform not only offers high-precision and highly stable temperature control capabilities but also possesses powerful electrochemical testing functions, providing a robust tool for in-depth research into the electrochemical properties of materials.