Photovoltaic spectrometer is a complete setup for solar cells’ spectral response investigation.
A sample is illuminated by a monochromatic beam, up to a few millimeters in diameter, in the ultraviolet, visible and infrared range. Additionally, the sample may be excited by a normalized white AM1.5G light. The cell is placed on a motorized vacuum XY table, with a manual Z shift. The measurement is performed in a chamber that provides screening from external light.
Quantities measured by the instrument:
- Photocurrent (I)
- Spectral reflection coefficient (R)
- Spectral transmission coefficient (T)
Characteristics:
- External quantum efficiency (EQE or IPCE)
- Internal quantum efficiency (IQE or APCE)
- Short-circuit current density (Jsc)
- Experiment chamber
- Motorized vacuum XY table with vacuum pump
- Integrating sphere
- Xenon lamp + AM1.5G filter
- Monochromator with two entrance slits for automatic switching between light sources
- Xenon lamp at the monochomator’s entrance
- Halogen lamp at the monochomator’s entrance
- Potentiostat for sample bias
- Computer with dedicated software FotoGUI
Inside the sample chamber:
Reflected flux measurement
Photocurrent measurement
- Spectral range: 200 nm – 1650 nm
- Adjustable white light beam intensity: 0.01 – 0.1 W/cm²
- Illumination homogeneity: 10 %
- XY table range: 20 x 20 cm
- Sample bias range: ± 2 V
- Adjustable contact pins on top and bottom of the sample
