Investigation of photoconductivity of silicon solar cells by a near-field scanning microwave microscope.
The photovoltaic effect in silicon solar cells were investigated by using a near-field scanning microwave microscope (NSMM) technique by measuring the microwave reflection coefficient at an operating frequency near 4GHz. As the photoconductivity in the solar cells was varied due to the incident light intensities and the wavelength, we could observe the photoconductivity changes at heterojunction interfaces inside the solar cells by measuring the change of reflection coefficient S(11) of the NSMM. By measuring the change of reflection coefficient, we also directly imaged the photoconductivity changes at heterojunction interfaces inside the solar cells.
Department of Physics and Interdisciplinary Program of Integrated Biotechnology, Sogang University, Seoul 121-742, Republic of Korea.
Jongchel
J
Kim
Arsen
A
Babajanyan
Tigran
T
Sargsyan
Harutyun
H
Melikyan
Seungwan
S
Kim
Barry
B
Friedman
Kiejin
K
Lee