Photoluminescence Spectroscopy Sheds New Light on Silicon Microchip Functional Properties.

Area of Science:

• Materials Science
• Semiconductor Physics
• Spectroscopy

Background:

• Monocrystalline silicon is a leading semiconductor in microelectronics.
• Silicon's low photoluminescence emission is shielded by integrated circuit layers.
• Advanced testing of silicon microchips requires overcoming these limitations.

Purpose of the Study:

• To develop new approaches for photoluminescence spectroscopy in silicon microchip evaluation.
• To demonstrate the use of a potentiometric dye for electric field sensing in operational silicon chips.
• To investigate the sensitivity of silicon photoluminescence to local temperature variations.

Main Methods:

• Utilizing photoluminescence spectroscopy to probe local interactions and dynamics.
• Applying a potentiometric dye for electric field sensing of silicon chips.
• Measuring phonon-assisted photoluminescence of crystalline silicon to detect temperature changes.

Main Results:

• Demonstrated a novel application of potentiometric dye for sensing electric fields in silicon chips.
• Showcased high sensitivity of silicon photoluminescence to local temperature (27-64 °C).
• Enabled sensing and mapping of thermal and electric field distributions.

Conclusions:

• Photoluminescence spectroscopy is a versatile tool for evaluating semiconducting materials and microchips.
• New conceptual approaches can overcome limitations in testing silicon microchips.
• Photoluminescence-based thermal and electric field mapping facilitates precision testing of integrated circuits.