Light Absorption and Photocurrent Oscillations in a-GeSe2 Films
The steady state photocurrent and optical properties of amorphous GeSe2 films has been investigated under the influence of continuous laser irradiation. A medium intensity (1.4 – 2.7 kW/cm2) is found where a low frequency (3–50 Hz) periodic pulsation in the transmitted light and the photocurrent sets in. A model for light induced absorption oscillation is presented based on the bistable local bonding geometry of the amorphous network.
KeywordsLone Pair Electron Photocurrent Measurement Amorphous Network Incident Photon Flux Space Charge Limitation
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