Two-photon excitation in an intermediate band solar cell structure

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Nazmul Ahsan
  • Naoya Miyashita
  • Muhammad Monirul Islam
  • Wladek Walukiewicz
  • Yoshitaka Okada

Detail(s)

Original languageEnglish
Article number172111
Journal / PublicationApplied Physics Letters
Volume100
Issue number17
Publication statusPublished - 23 Apr 2012
Externally publishedYes

Abstract

We present evidence for the production of photocurrent due to two-photon excitation in an intermediate band solar cell structure. The structure consists of an n-GaNAs intermediate band layer sandwiched between a p-AlGaAs emitter and an n-AlGaAs barrier layer with suitable doping level to block electron escaping from the intermediate band to the bottom n-GaAs substrate. Multi-band transitions observed in two-photon excitation experiments are explained using photo-modulated reflectance spectrum, and further support for intermediate band solar cell operation of this structure is given by current-voltage measurements. © 2012 American Institute of Physics.

Citation Format(s)

Two-photon excitation in an intermediate band solar cell structure. / Ahsan, Nazmul; Miyashita, Naoya; Monirul Islam, Muhammad; Man Yu, Kin; Walukiewicz, Wladek; Okada, Yoshitaka.

In: Applied Physics Letters, Vol. 100, No. 17, 172111, 23.04.2012.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review