Cymhwyso mesurydd ffynhonnell manwl uchel mewn prawf nodwedd celloedd solar

Gyda datblygiad cyflym economi'r byd a dyfnhau diwydiannu, mae galw dynol am ynni yn cynyddu o ddydd i ddydd. O'i gymharu ag ynni tanwydd ffosil anadnewyddadwy, gall ymbelydredd solar gynnal allbwn cyson am ddegau o biliynau o flynyddoedd, ac mae trosi ynni golau yn ynni trydanol yn broses hynod bwysig. Mae celloedd solar yn fath o ddalen lled-ddargludyddion ffotodrydanol sy'n defnyddio golau'r haul i gynhyrchu trydan yn uniongyrchol. Pan fydd y goleuo'n cwrdd â rhai amodau, gall foltedd allbwn ar unwaith a chynhyrchu cerrynt ym mhresenoldeb cylched. Fe'i defnyddir yn eang mewn amrywiol feysydd megis cludiant, cyfathrebu a lloerennau.

From research and development to production, solar cells have different testing requirements in each link. Their photoelectric characteristics include volt-ampere I-V characteristics, spectral response SR characteristics, and quantum efficiency QE characteristics. Among them, I-V characteristic analysis is crucial to deriving important parameters related to solar cell performance, mainly including maximum current I-max and voltage V-max, open circuit voltage Voc, short circuit current Isc, fill factor ff, and conversion efficiency η. In order to accurately complete the I-V characteristic test of solar cells, the tester needs to use a solar simulator light source to irradiate the sample within a certain distance, and then use precision electrical instruments to measure the I-V characteristic curve to obtain the battery parameters.

When there is no light, the specified DC bias voltage is required to measure the IV characteristics of solar cells, and the IV characteristic curve under forward bias voltage is measured; when there is no bias voltage, the IV characteristics of solar cells under different load conditions are measured by incident light of various wavelengths (the load characteristics of multiple series are more obvious), and the short-circuit current Isc, open-circuit voltage Voc, maximum power, optimal operating current and voltage are measured. The NGI N2600 series high-precision digital source meter integrates source-measurement functions, can output ultra-high-precision voltage source and current source, and provides measurement functions, which can fully meet the needs of solar cell IV characteristic testing.

Spectral response SR is an indicator for evaluating the photoelectric conversion capability of solar cells. Provide incident light of various wavelengths, and the ratio of the current converted after receiving the incident light to the incident light energy is the spectral response SR. The N2600 series source meter can accurately measure the photocurrent to complete the SR current characteristic test.

Generally, power supplies only provide 1st and 3rd quadrant operation, emitting energy as a source. The N2600 series can provide full four-quadrant operation. When working in the 2nd and 4th quadrants, it can absorb energy as a sink (load). In source or sink mode, it can measure voltage, current and resistance. Its maximum sampling speed can reach 100ksps, and the scanning speed is 1ms per point.