Spatial uniformity inspection apparatus for solar cells using a projection display.
We demonstrate a measurement apparatus to inspect spatial uniformity of quantum efficiency of solar cells using a beam projector. Deviation of irradiance from the used beam projector over the area of 1.5×0.8 m on the cell plane was flattened within ±2.6% through gray scale adjustment, which was originally about 200%. Scanning a small square image with an area of 3×3 mm over a square-shaped photovoltaic cell with an area of 15.6×15.6 cm, we could identify the locations according to efficiency level and showed that the cell had quantum efficiency deviation of more than 10%. Utilizing the advantageous feature of a projection display, we also demonstrated that this apparatus can inspect the spatial uniformity of solar modules and panels consisting of multiple solar cells.
Division of Physical Metrology, Korea Research Institute of Standards and Science, Yuseong-Gu, Daejeon, South Korea.
Jae-Keun
JK
Yoo
Seung Kwan
SK
Kim
Dong-Hoon
DH
Lee
Seung-Nam
SN
Park