Towards an optimized all lattice-matched InAlAs/InGaAsP/InGaAs multijunction  solar cell with efficiency >50%

Towards an optimized all lattice-matched InAlAs/InGaAsP/InGaAs multijunction solar cell with efficiency >50%

Year:2013
Author(s):Marina S. Leite, Robyn L. Woo, Jeremy N. Munday, William D. Hong, Shoghig Mesropian, Daniel C. Law, and Harry A. Atwater
Citation(s):Appl. Phys. Lett. 102, 033901 (2013)

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Abstract: An approach for an all lattice-matched multijunction solar cell optimized design is presented with 5.807 Å lattice constant, together with a detailed analysis of its performance by means of full device modeling. The simulations show that a (1.93 eV)In0.37 Al 0.63As/(1.39 eV)In0.38Ga0.62As0.57P0.43/(0.94 eV)In0.38Ga0.62As 3-junction solar cell can achieve efficiencies >51% under 100-suns illumination (with Voc = 3.34 V). As a key proof of concept, an equivalent 3-junction solar cell lattice-matched to InP was fabricated and tested. The independently connected single junction solar cells were also tested in a spectrum splitting configuration, showing similar performance to a monolithic tandem device, with Voc = 1.8 V.