Intraband transitions at a CsPbBr3/GaAs heterointerface in a two-step photon upconversion solar cell
Hambalee Mahamu,
Shigeo Asahi,
Takashi Kita
Abstract:Two-step photon upconversion solar cells (TPU-SCs) based on III–V semiconductors can achieve enhanced sub-bandgap photon absorption because of intraband transitions at the heterointerface. From a technological aspect, the question arose whether similar intraband transitions can be realized by using perovskite/III–V semiconductor heterointerfaces. In this article, we demonstrate a TPU-SC based on a CsPbBr3/GaAs heterointerface. Such a solar cell can ideally achieve an energy conversion efficiency of 48.5% under… Show more
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