Temperature coefficient of short circuit current may not be proper metric for perovskite-silicon tandem solar cells – pv magazine International

Researchers on the King Abdullah College of Science and Expertise (KAUST) in Saudi Arabia investigated whether or not the temperature coefficient of the brief circuit present of perovskite-silicon tandem photo voltaic cells may be an correct measurement commonplace to research the their habits and efficiency.

“The concept of ​​this brief paper is to point out that the temperature coefficient of the brief circuit present, measured underneath commonplace lighting circumstances will not be an excellent description of the particular operation of the tandems,” the corresponding writer of the analysis, Maxime Babics, stated. pv journal. “Relying on the native spectrum and the temperature vary, the present at most energy (Impp) can improve, lower or have a blended character. This distinctive impact, which is properly described on this paper, will assist the group to higher perceive their outside knowledge as a result of outside tandem operation ought to grow to be extra frequent within the subsequent few years.

on paper”Temperature Coefficients of Perovskite/Silicon Tandem Photo voltaic Cells,” printed in ACS Power Lettersthe analysis group introduced the outcomes of a sequence of checks carried out on a 29.0%-efficient tandem perovskite-silicon system at temperatures from 25 C to 65 C. “Our work additionally opens the dialogue on whether or not how you can greatest describe the temperature coefficient of perovskite-silicon or perovskite-CIGS tandems, as a result of it’s a key parameter given in any module datasheet,” stated Babics.

The scientists stated that they weren’t capable of predict the present adjustments in tandem cells underneath actual outside operation as precisely as single-junction gadgets.

Particularly, they discovered that components comparable to exterior quantum effectivity (Stroll) of perovskite subcells, the bandgap of perovskite, the native photo voltaic spectrum, and the working temperature vary are components that make the evaluation of temperature coefficients crucial. “The temperature coefficient of the brief circuit present in perovskite-silicon tandem photo voltaic cells may be unfavorable, constructive, or a combination of the 2 relying on the photo voltaic spectrum and working temperature vary,” added Babics.