Cell Doctor

Detailed health check for silicon wafer solar cells

Cell doctor combines a variety of cell level measurements and powerful modelling software to render a comprehensive picture of the solar cell’s power losses, areas for improvement, and rooms for improvement. We will accelerate your continuous improvement programme, shorten product development time, and set you on a direct course to immediate gains in efficiency, by answering questions like

  1. What are the main limitation factors in Jsc, Voc and fill factor?
  2. By how much will the efficiency go up if one improves these areas within a realistically achievable range?

The customer will also be empowered with the complete model of the solar cell in Griddler 2.5 PRO, together with a 1 year software license, from which one can independently explore efficiency improvements and optimize cell design.

We also offer follow up work packages that involve evaluating process steps at SERIS or consultancy at the manufacturing site.

Brought to you by the same team who developed the methods and software, with experience in both cell processing as well as measurement and loss analysis, we offer a quick turnaround time of three weeks to accelerate your research and development by months.


Report includes

  • High precision steady state cell I-V and spectral response parameters, and comparison to similar in class cells measured at SERIS.
  • High precision steady state cell I-V and spectral response parameters, and comparison to similar in class cells measured at SERIS.

    Components of Jsc (current density) loss from reflectance and spectral response data.

  • Components of J01 and J02 (saturation current density, related to the open circuit voltage Voc) loss from photoluminescence (PL) images, traced to cell emitter, BSF, front and rear contacts, wafer edge and periphery
  • Components of FF (fill factor) loss from I-V and cell resistance measurements, traced to second diode, emitter and BSF sheet resistance, contact resistance.
  • Analysis and discussions; suggestions for improvement and future work


For further information, please contact:

Dr Johnson WONG
Head of PV Characterisation Group
Silicon Materials and Cells Cluster

johnson.wong@nus.edu.sg

+65 6601 1961