Two-Color Photoexcitation in a GaNAs/AlGaAs Quantum Well Solar Cell
作者： Martin Elborg , Masafumi Jo , Yi Ding , Takeshi Noda , Takaaki Mano
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摘要: We demonstrate an efficient two-color photoexcitation process in a GaNAs/AlGaAs multiple quantum well (MQW) solar cell. The introduction of N into the GaAs MQW induces marked reduction bandgap energy, forming large conduction band offset, and formation localized states. Owning to this deep confinement, thermal escape photogenerated carriers from QWs is greatly suppressed even at room temperature, resulting photocurrent. An additional photocurrent generated by absorption sub-bandgap photons.
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