Opto-Electronic Modulation Spectroscopy for the Characterization of Trapping Defects in Semiconductors

Stephen Wong

Oberlin College

Opto-Electronic Modulation Spectroscopy for the Characterization of Trapping Defects in Semiconductors

Outline

Semiconductor Energy Bands

Semiconductor Energy Bands

Semiconductor Energy Bands

Trapping Defects in Semiconductors

Trapping Defects in Semiconductors

Trapping Defects in Semiconductors

Trapping Defects in Semiconductors

Trapping Defects in Semiconductors

Opto-electronic Modulation Spectroscopy (OEMS)

Opto-electronic Modulation Spectroscopy (OEMS)

OEMS setup at Oberlin

System Capabilities

Thin Film Solar Cell Construction

Thin Film Solar Cell Construction

The Effects of Trapping Defects on Solar Cell Performance

The Effects of Trapping Defects on Solar Cell Performance

Controlling Defects

Optimizing Performance