Bulletin of the American Physical Society
APS March Meeting 2016
Volume 61, Number 2
Monday–Friday, March 14–18, 2016; Baltimore, Maryland
Session G1: Poster Session I (Tuesday, 2:00 pm - 5:00 pm)
Tuesday, March 15, 2016
Room: Exhibit Hall EF
Abstract ID: BAPS.2016.MAR.G1.136
Abstract: G1.00136 : Frequency and voltage dependence of series resistance in a solar cell
While admittance measurements of solar cells are typically conducted in reverse or at zero bias, and analyzed using the depletion approximation, the operating point of the solar cell is in forward bias, and the series resistance is often estimated using IV curves with a high forward current. In this mode, the device is no longer in the depletion regime, and the large number of injected minority carriers alter the transport properties significantly. In our Cu(In,Ga)Se2 devices, we measure negative values of capacitance at high forward bias, which may be linked to injected minority carriers and carrier transport limitations, although our calculations of capacitance may also be influenced by series resistance. In this study, we compare ac and dc measurements of voltage dependent series resistance to try to better understand the negative capacitance signal.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2016.MAR.G1.136
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