Wafer-scale photodetector (thin slice-based) device fabricated
Part of: GS Prelims and GS-III – Science and Technology
- Recently, scientists from the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) have fabricated a wafer-scale photodetector (thin slice-based) device, using gold-silicon interface.
- JNCASR is an autonomous institute under the Department of Science and Technology (DST).
- The gold (Au)-silicon (n-Si) interface shows high sensitivity towards light.
- The Au-Si interface was brought about by galvanic deposition (a technique for electroplating of metals) wherein water-based solutions (electrolytes) are used, which contain the metals to be deposited as ions.
Important value additions:
- These are an important part of an opto-electronic circuit that can detect light.
- Their applications include:
- Controlling automatic lighting in supermarkets.
- Being used in security-related applications.
- Photodetectors are unaffordable for daily applications due to high material costs.
- Au-Si interface Photodetectors has many advantages:
- The fabricating process is quick and simple.
- The method is highly economical since it is a solution-based technique.
- It can detect weak scattered light as an indication of unwanted activity.
- The device does not require external power to operate and runs on self-operated mode.