1. chemical database: use professional chemical databases, such as SciFinder and Reaxys, to search and find the energy band position of specific compounds. These databases contain a lot of chemical substances and reaction information, including energy band positions.

2. Academic literature: Find the energy band position of specific compounds in academic journals or papers. Search related literature through databases such as GoogleScholar and WebofScience. In the literature, the experimental energy band position data can be found in the materials and methods section.

3. Computational chemistry software: Use computational chemistry software, such as Gaussian and QuantumESPRESSO, to simulate and calculate the energy band position of the compound. These softwares are based on density functional theory (DFT) and other methods to predict the electronic structure and energy band properties of materials.