Question

what is the maximum efficiency of the solar cell that had ever been created?

Answer 1

Multi Layer can reach 32% but is very expensive and it use rare earth materials

Answer 2

\(\Large\rm\color{blue}{Welcome~to~OpenStudy!}\) @TaifAiedFaisalAlawsi

According to world records, during the month of September 2013, the highest efficiencies have been achieved by using multiple junction cells at high solar concentrations (44.7% by the Fraunhofer ISE, Soitec, CEA-Leti and the Helmholtz-Zentrum Berlin).
Ref: http://www.ise.fraunhofer.de/en/press-and-media/press-releases/presseinformationen-2013/world-record-solar-cell-with-44.7-efficiency

Hope it Helps.

Answer 3

2 c: lol