Graphene Based Solar Panel Reaches Record 15.6 Percent Efficiency Making Silicon Based Panels Obsolete
With this new development and the record efficiency of 15.6 percent reached by using Graphene as a charge collector, Silicon based panel technology is de facto obsolete. What remains to be seen is at what cost will these new panels be produced and the important question of time to market. Already by ditching the important cost of Silicon in panels, we can assume that solar panels will reach another low by the time this new technology reaches the market.
In 2012, researchers from the University of Florida reported a record efficiency of 8.6 percent for a prototype solar cell consisting of a wafer of silicon coated with a layer of graphene doped with trifluoromethanesulfonyl-amide (TFSA). Now another team is claiming a new record efficiency of 15.6 percent for a graphene-based solar cell by ditching the silicon all together.
The prototype photovoltaic device, created by researchers from the Group of Photovoltaic and Optoelectronic Devices (DFO) at Spain's Universitat Jaume I in Castelló and Oxford University, uses a combination of titanium oxide and graphene as a charge collector and perovskite as a sunlight absorber.
As well as the impressive solar efficiency, the team says the device is manufactured at low temperatures, with the several layers that go into making it being processed at under 150° C (302° F) using a solution-based deposition technique. This not only means lower potential production costs, but also makes it possible for the technology to be used on flexible plastics.
The team's paper is published in the journal Nano Letters.
Source: Asociación RUVID (Spanish)
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