| As a modern materials testing equipment, UV-Visible absorption spectroscopy has been applied in a wide range of research field. Although homemade equipment has relatively lower cost, the limited wavelength range (300~700nm) and resolution could not satisfy advanced analysis.To reduce cost and improve the resolution, we decide to use a sound card and software-based digital wave filter to replace the commonly used electrical amplifying circuit and X-Y recorder. As a result, the range of wavelength could be expanded covering from 200 to 11 OOnm, meanwhile, the cost of the equipment was greatly reduced.To test the practicability of the equipment, we prepared two kinds of multi-layered organic samples. The testing results showed that the spectroscopy acquired by the spectrometer is reliable. Meanwhile, some new phenomena were observed from the multi-layered organic samples , and the phenomena were explained by charge transfer and quantum confinement effect of the carrier. |
PDF Full Text Request