Enhanced performance of hybrid solar cells based on ordered electrospun ZnO nanofibers modified with CdS on the surface

Sujuan Wu, Jinhua Li, Shing Chung Lo, Qidong Tai, Feng Yan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)

Abstract

To improve the performance of the hybrid solar cells based on electrospun zinc oxide nanofibers/poly(3-hexylthiophene) (ZnO/P3HT), we modified the ZnO nanofibers with nanocrystalline cadmium sulfide (CdS) by solution process and successfully obtained CdS/ZnO core-shell nanofibers. The CdS modification at the optimum condition can dramatically improve all photovoltaic parameters and increase the power conversion efficiency of the hybrid solar cells for over 100%. In addition, the lifetimes of carriers in the hybrid solar cells characterized by impedance analyzer become much longer after the modification of CdS. The effect of CdS modification on the devices can be mainly attributed to the cascaded energy band structure of the heterojunction that favors charge transport process and thus increases the efficiencies of the devices.
Original languageEnglish
Pages (from-to)1569-1575
Number of pages7
JournalOrganic Electronics: physics, materials, applications
Volume13
Issue number9
DOIs
Publication statusPublished - 1 Sep 2012

Keywords

  • CdS
  • Electrospun nanofibers
  • Organic solar cell
  • Poly(3-hexylthiophene)
  • ZnO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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