Laser scanned photodiodes (LSP) for image sensing

Vieira, Manuela; Fernandes, Miguel; Louro, Paula; Schwarz, R.; Schubert, M.

http://hdl.handle.net/10400.21/1345

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Abstract(s)

An optimized ZnO:Al/a-pin SixCl1-x:H/Al configuration for the laser scanned photodiode (LSP) imaging detector is proposed. The LSP utilizes light induced depletion layers as detector and a laser beam for readout. The effect of the sensing element structure, cell configuration and light source flux are investigated and correlated with the sensor output characteristics. Experimental data reveal that the large optical gap and the low conductivity of the doped a-SixC1-x:H layers are responsible by an induced inversion layer at the illuminated interfaces which blocks the carrier collection. These insulator-like layers act as MIS gates preventing image smearing. The physical background of the LSP is discussed.

Keywords

Laser scanner photodiode Image acquisition and representation Analog readout

URI

http://hdl.handle.net/10400.21/1345

Citation

VIEIRA, M.; [et al] – Laser scanned photodiodes (LSP) for image sensing. In Transducers'01: Eurosensors XV, Digest Technical Papers (11th International Conference on Solid-State Sensors and Actuators). Munich, Germany: Springer, 2001. Vol. 1e 2. Pp. 578-581.