Fig. 1: Operation schemes of different types of intermediate-band solar cells (IBSCs) and the energy-transfer model. | Communications Physics

Fig. 1: Operation schemes of different types of intermediate-band solar cells (IBSCs) and the energy-transfer model.

From: Experimental demonstration of energy-transfer ratchet intermediate-band solar cell

Fig. 1

a Conventional ratchet IBSC involving carrier excitation, recombination, and sequential two-photon absorption (STPA) among the valence band (VB), intermediate band (IB), conduction band (CB), and ratchet band located at an energy ΔE below the IB, b energy-transfer and back transfer model, and c the energy-transfer-coupled ratchet IBSC along with proposed in this work, respectively.

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