Effects of Photon Energy Spectrum on the Photocurrent of Hydrogenated Amorphous Silicon Thin Film Transistor by Using Frequency Filters

Frequency filters with various filtering wavelengths were used in the photoelectric characterization of hydrogenatedamorphous silicon thin film transistor (a-Si:H TFT) and the experimental results were described and analyzed in termsof the photon energy spectral characteristics calculated from the integration of the photon energy and the spectralintensity of transmitted backlight through the filters at each wavelength. From the comparison of the photocurrentsand the calculated photon energy spectrums for the filtered ranges of wavelength, it was possible to conclude that thephotocurrents are closely related to the photon energy spectrums of the backlight.