A copper indium gallium based photodetector

Abstract

The present invention provides a novel photoelectric detector based on copper indium gallium selenium and copper indium gallium sulfide. According to the composite functional layer, a contact part ofthe copper indium gallium selenium and the copper indium gallium sulfide is changed into copper indium gallium selenium sulfide, a composition is gradually changed in a transverse direction, the functional layer is modified, the electrical performance is adjusted to meet requirements of the photoelectric detector, the sensitivity of the detector is further improved, and the stability of the sensoris greatly improved.

Description

technical field [0001] The invention relates to a sensor, in particular to a copper indium gallium-based photodetector. Background technique [0002] Electronic devices, such as smart phones, tablet computers, digital media players, etc., increasingly employ optical (eg, light) sensors to control manipulation of the various functions provided by the device. For example, electronic devices often use light sensors to detect ambient lighting conditions to control the brightness of the device's display screen. Typical light sensors employ photodetectors, such as photodiodes, phototransistors, etc., that convert received light into electrical signals (eg, current or voltage). [0003] Light sensors are commonly used in gesture sensing devices. The gesture-sensing device enables the detection of physical motion (eg, a "gesture") without the user actually touching the device on which the gesture-sensing device resides. The detected motion can then be used as an input command for...

AI Technical Summary

Problems solved by technology

[0005] In many application fields, such as the output part of the optocoupler, it is often necessary to integrate the photodetector and signal processing on the same single chip, that is, to realize the process compatibility between the photodetector and the signal processing circuit, which is another The technology is very complex and quite difficult

[0006] At present, the application of CIGS and CIGS in photovoltaic and photodetection has been widely studied, but the potential has not been fully tapped, so photosensors based on CIGS and CIGS, especially There is still a lot of room for development of photoelectric sensors combined with other materials. In this field, there are still many photoelectric sensors worth discovering and looking for with various structures or combinations of structures and materials.

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