Tandem solar cell globe document: New branch in the NREL graph

Apr 15, 2020 03:13 PM ET
  • Tandem cells integrate 2 various semiconductors that transform various parts of the light range right into electric power. Metal-halide perovskite substances mostly make use of the noticeable parts of the range, while CIGS semiconductors transform instead the infrared light.
Tandem solar cell globe document: New branch in the NREL graph
Image: solardaily.com

CIGARETTE cells, which contain copper, selenium, gallium as well as indium, can be transferred as thin-films with an overall density of just 3 to 4 micrometers; the perovskite layers are also much thinner at 0.5 micrometers. The brand-new tandem solar battery made from CIGS and also perovskite therefore has a density of well listed below 5 micrometers, which would certainly enable the manufacturing of flexible solar components.

"This mix is likewise very lightweight and also steady versus irradiation, and also could be appropriate for applications in satellite modern technology precede", states Prof. Dr. Steve Albrecht, HZB. These outcomes, acquired in a huge cooperation, have actually been simply released in the prominent journal JOULE.

"This time, we have actually attached the bottom cell (CIGS) straight with the leading cell (perovskite), to ensure that the tandem cell has just 2 electric get in touches with, supposed terminals", describes Dr. Christian Kaufmann from PVcomB at HZB, that established the CIGS base cell with his group as well as he includes "Especially the intro of rubidium has actually considerably enhanced the CIGS absorber product".

Albrecht as well as his group have actually transferred in the HySPRINT laboratory at HZB the perovskite layer straight on the harsh CIGS layer.

"We made use of a technique that we had actually formerly created," describes previous postdoc from Albrecht's team Dr. Marko Jost, that is currently a researcher at the University of Ljubjana, Slovenia. They used supposed SAM particles to the CIGS layer, which develop a self-organised monomolecular layer, enhancing the get in touch with in between perovskite and also CIGS.

The brand-new perovskite CIGS tandem cell accomplishes a performance of 24.16 percent. This worth has actually been formally licensed by the CalLab of the Fraunhofer Institute for Solar Energy Systems (ISE).

Given that such "2 Terminal" tandem cells constructed from CIGS and also perovskite currently stand for a different classification, the National Renewable Energy Lab NREL, USA, has actually developed a brand-new branch on the popular NREL graph for this function.

This graph reveals the advancement of effectiveness for nearly all solar battery kinds considering that 1976. Perovskite substances have actually just been consisted of considering that 2013 - the effectiveness of this product course has actually boosted even more considerably than any other product.

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