Multicolor Electroluminescence from Intermediate Band Solar Cell Structures

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

7 Scopus Citations
View graph of relations

Author(s)

  • Nair López
  • Kin Man Yu
  • Tooru Tanaka
  • Wladyslaw Walukiewicz

Detail(s)

Original languageEnglish
Article number1501820
Journal / PublicationAdvanced Energy Materials
Volume6
Issue number5
Publication statusPublished - 9 Mar 2016

Abstract

Intermediate band solar cells are a new generation of photovoltaics that allow for better utilization of the solar spectrum. The key and most challenging requirement for these cells is an efficient optical coupling between the intermediate band and the charge conducting bands. GaNAs based intermediate band solar cells have been used to generate electroluminescence. Two electroluminescence peaks are generated in the structure with electrically blocked intermediate band. The peaks are observed for both forward and reverse bias configuration and are attributed to optical transitions from the conduction to the intermediate band, and from the intermediate band to the valence band. The origin of the electroluminescence is confirmed by the temperature dependence of the electroluminescence peak energies that is consistent with the band anticrossing model of the intermediate band formation in dilute nitride alloys. This is the first direct observation of the optical transitions required for the operation of intermediate band solar cells. The results also demonstrate that properly modified intermediate band solar cell structures could be used as multicolor light emitters.

Research Area(s)

  • band anticrossing, dilute nitride alloys, photovoltaic devices, solar cells

Citation Format(s)

Multicolor Electroluminescence from Intermediate Band Solar Cell Structures. / López, Nair; Yu, Kin Man; Tanaka, Tooru; Walukiewicz, Wladyslaw.

In: Advanced Energy Materials, Vol. 6, No. 5, 1501820, 09.03.2016.

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