Broadband and omnidirectional light harvesting enhancement in photovoltaic devices with aperiodic TiO2nanotube photonic crystal

Min Guo, Haijun Su, Jun Zhang, Lin Liu, Nianqing Fu, Zehui Yong, Haitao Huang, Keyu Xie

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

� 2017 Elsevier B.V. Design of more effective broadband light-trapping elements to improve the light harvesting efficiency under both normal and tilted light for solar cells and other photonic devices is highly desirable. Herein we present a theoretical analysis on the optical properties of a novel TiO2nanotube aperiodic photonic crystal (NT APC) following an aperiodic sequences and its photocurrent enhancement effect for dye-sensitized solar cells (DSSCs) under various incidence angles. It is found that, compared to regular PC, the designed TiO2NT APC owns broader reflection region and a desired omnidirectional reflection (ODR) bandgaps, leading to considerable and stable photocurrent enhancement under both normal and oblique light. The effects of the structural parameters of the TiO2NT APC, including the average lattice constant and the common sequence difference, on the optical properties, ODR bandgaps and absorption magnification of the integrated DSSCs are investigated in detail. Moreover, the angular dependence of photocurrent enhancement and angular compensation effect of such TiO2NT APCs are also provided to offer a guidance on the optimum structural parameters design under different engineering application conditions.
Original languageEnglish
Pages (from-to)12-20
Number of pages9
JournalJournal of Power Sources
Volume345
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Aperiodic photonic crystal
  • Dye-sensitized solar cell
  • Light harvesting
  • Omnidirectional reflection

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this