Cl-doping effect in ZnTe1-xOx highly mismatched alloys for intermediate band solar cells

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

4 Scopus Citations
View graph of relations

Author(s)

  • Tooru Tanaka
  • Kento Matsuo
  • Katsuhiko Saito
  • Qixin Guo
  • Takeshi Tayagaki
  • Wladek Walukiewicz

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number243109
Number of pages5
Journal / PublicationJournal of Applied Physics
Volume125
Issue number24
Online published28 Jun 2019
Publication statusPublished - 28 Jun 2019

Abstract

Cl doping in highly mismatched ZnTe1-xOx (ZnTeO) alloys was achieved by molecular beam epitaxy using ZnCl2 as a dopant source. The temperature dependence of the bandgap energies for both upper and lower subbands, E+ and E, of ZnTeO was determined by photoreflectance, and it was found to vary in accordance with those expected by the band anticrossing model. Secondary ion mass spectroscopy indicates that the Cl concentration increases with increasing ZnCl2 cell temperature. Low temperature photoluminescence (PL) spectra show the broad PL peak near the E band. Intermediate band solar cells (IBSCs) fabricated using ZnTeO:Cl exhibit improved short circuit current and open circuit voltage. The results suggest that the Cl doping can effectively improve the PV properties of ZnTeO-based IBSCs and, therefore, is potentially useful for the realization of high efficiency IBSCs.

Citation Format(s)

Cl-doping effect in ZnTe1-xOx highly mismatched alloys for intermediate band solar cells. / Tanaka, Tooru; Matsuo, Kento ; Saito, Katsuhiko; Guo, Qixin; Tayagaki, Takeshi; Yu, Kin Man; Walukiewicz, Wladek.

In: Journal of Applied Physics, Vol. 125, No. 24, 243109, 28.06.2019.

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