ASTM E1021-12 Test for Spectral Responsivity Measurements of Photovoltaic Devices

Scope: 

ASTM E1021-12 is a crucial test method used to evaluate the performance of photovoltaic devices, which convert sunlight into electricity. The test method measures the spectral responsivity of a device, which is the electrical output per unit of sunlight input. This measurement is important for determining device performance and material characteristics, and the results obtained can be used for quality control and research and development purposes. 

Furthermore, by combining the results obtained by this test method with additional measurements, the internal quantum efficiency of a device can be calculated, which provides further insight into its performance. However, it is important to note that these additional measurements are beyond the scope of this test method. The values presented in the SI units are considered the standard.

Test Procedure: 

ASTM E1021-12 outlines a procedure for determining the spectral responsivity of photovoltaic devices. This involves exposing the device to both monochromatic and continuous white light sources, with the current at the intended voltage being monitored as the wavelength of the incident light is changed. The absolute spectral responsivity of the device can then be calculated using the measured device photocurrent, the power or irradiance of the monochromatic beam, and absolute measurements of beam power or irradiance. 

The total power or irradiance of the monochromatic beam is determined using a reference photodetector. This standardized method provides a reliable means of determining the spectral responsivity of photovoltaic devices.

Data: 

The following information is reported:

A plot of relative or absolute spectral responsivity versus wavelength is reported. The current is induced in the photovoltaic device by the light. The voltage induced in the device. 

Conclusion:

ASTM E1021-12 provides a standard test method for the measurement of the spectral responsivity of photovoltaic devices. This test method covers the measurement of the spectral responsivity of a photovoltaic device over a wavelength range of 200 nm to 400 nm. The spectral responsivity is determined by measuring the short-circuit current of the device under test when it is exposed to monochromatic light of varying wavelengths.