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Novel Amorphous-Silicon-Based Light Converter

A novel amorphous-silicon-based light converter has been developed. The device consists of an amorphous-silicon pin diode as the input-light sensing unit and a GaAsP light-emitting diode (LED) as the light-emitting unit. With appropriate selection of the i-a-Si:H layer thickness, the device can convert UV and visible light into red light. The key features of the device are low cost and simplicity of the preparation process. In this letter, the design, operation, fabrication, and measurements of the device have been described in detail.