Arrays of ZnO/CuInxGa1-xSe2 nanocables with tunable shell composition for efficient photovoltaics

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

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Author(s)

  • Muhammad Aftab Akram
  • Sofia Javed
  • Jun Xu
  • Mohammad Mujahid
  • Chun-Sing Lee

Detail(s)

Original languageEnglish
Article number205306
Journal / PublicationJournal of Applied Physics
Volume117
Issue number20
Publication statusPublished - 28 May 2015

Link(s)

Abstract

Arrays of one-dimensional (1D) nanostructure are receiving much attention for their optoelectronic and photovoltaic applications due to their advantages in light absorption, charge separation, and transportation. In this work, arrays of ZnO/CuInxGa1-xSe2 core/shell nanocables with tunable shell compositions over the full range of 0 ≤ x ≤ 1 have been controllably synthesized. Chemical conversions of ZnO nanorods to a series of ZnO-based nanocables, including ZnO/ZnSe, ZnO/CuSe, ZnO/CuSe/InxGa1-x, ZnO/CuSe/(InxGa1-x)2Se3, and ZnO/CuInxGa1-xSe2, are well designed and successfully achieved. Composition-dependent influences of the CuInxGa1-xSe2 shells on photovoltaic performance are investigated. It is found that the increase in indium content (x) leads to an increase in short-circuit current density (JSC) but a decrease in open-circuit voltage (VOC) for the ZnO/CuInxGa1-xSe2 nanocable solar cells. An array of ZnO/CuIn0.67Ga0.33Se2 nanocables with a length of ∼1 μm and a shell thickness of ∼10 nm exhibits a bandgap of 1.20 eV, and yields a maximum power conversion efficiency of 1.74% under AM 1.5 G illumination at an intensity of 100 mW/cm2. It dramatically surpasses that (0.22%) of the ZnO/CuIn0.67Ga0.33Se2 planar thin-film device. Our work reveals that 1D nanoarray allows efficient photovoltaics without using toxic CdS buffer layer.

Research Area(s)

Citation Format(s)

Arrays of ZnO/CuInxGa1-xSe2 nanocables with tunable shell composition for efficient photovoltaics. / Akram, Muhammad Aftab; Javed, Sofia; Xu, Jun et al.
In: Journal of Applied Physics, Vol. 117, No. 20, 205306, 28.05.2015.

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

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