Two-sided photo voltaic cells can acquire scattered mild to assemble extra vitality

A bifacial perovskite/silicon tandem prototype being field-tested at King Abdullah College of Science & Expertise in Saudi Arabia. The brand new expertise is the results of a collaboration that features U of T Engineering researchers. Credit score: Michele De Bastiani

To extend the efficiency of photo voltaic panels, a world collaboration—together with researchers from King Abdullah College of Science & Expertise (KAUST) and U of T Engineering—has created a bifacial, or two-sided, tandem photo voltaic cell, constructed by bringing collectively the perfect of the perovskite and silicon applied sciences.

Out within the subject, mild primarily comes instantly from the solar. Typical tandem photo voltaic cells can already convert this mild into electrical energy extra effectively in comparison with conventional silicon-only photo voltaic cells by absorbing further wavelengths of sunshine.

Now, the researchers have realized that much more vitality will be gathered utilizing a two-sided tandem configuration. Gentle mirrored and scattered from the bottom—known as “albedo”—will also be collected to considerably improve the present of a tandem photo voltaic cell.

The analysis, which was printed at this time within the journal Nature Power, outlines precisely how the group engineered the perovskite/silicon machine to exceed the at the moment accepted efficiency limits for the tandem configuration.

“By exploiting the albedo, we are able to now generate currents increased than in standard tandems, with out rising the manufacturing prices in any respect,” mentioned Dr. Michele De Bastiani, the co-lead creator of this examine. The examine’s authors embrace College Professor Ted Sargent (ECE) and ECE postdoctoral fellow Yi Hou.

The potential for capturing oblique daylight has been studied prior to now, however with out experimental verification. Along with U of T Engineering, KAUST researchers labored with collaborators from the Karlsruhe Institute of Expertise, and the College of Bologna to unravel the scientific and engineering challenges required to incorporate oblique daylight within the vitality gathering capability of their modules.

With this information at hand, they examined the bifacial tandem photo voltaic cell in outside circumstances, attaining efficiencies past any business silicon photo voltaic panel.

“Bifacial silicon-only photo voltaic cells are quickly taken an rising share within the photovoltaics market, as they will result in a efficiency acquire of 20% relative. Exploiting this idea in perovskite/silicon tandems now opens alternatives for ultra-high energy era at reasonably priced value” concluded Professor Stefaan De Wolf (KAUST).


Tandem units really feel the warmth


Extra info:
Michele De Bastiani et al. Environment friendly bifacial monolithic perovskite/silicon tandem photo voltaic cells through bandgap engineering, Nature Power (2021). DOI: 10.1038/s41560-020-00756-8

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