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Three-dimensional Graphene Electrode for Depleted-hetreojunction Quantum Dot Solar Cells

Tavakoli, M. M ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1016/j.proeng.2015.08.1116
  3. Publisher: Elsevier Ltd , 2016
  4. Abstract:
  5. Herein, a simple and novel method was used to synthesize a new structure of graphene which can be called hollow graphene. First, the ZnO-Graphene QDs synthesized by solution method and then ZnO QDs were dissolved from this structure using an acidic solution to obtain hollow structure of graphene. Afterward, this structure was used in PbS QDs solar cell in order to improve the transport of electron and decrease the recombination of the carriers. A power conversion efficiency of 5.3% was obtained using hollow graphene as a fast electron extraction layer due to the enhancement of EQE and current density. The improvement of PCE in this device was corresponded to efficient photosensitized electron injection from the conduction band of PbS QDs to the LUMO levels of hollow graphene and slow carriers recombination
  6. Keywords:
  7. PbS ; Solar cell ; ZnO-graphene ; Graphite electrodes ; Lead ; Nanocrystals ; Semiconductor quantum dots ; Solar cells ; Zinc oxide ; 3D graphene ; Acidic solutions ; Colloidal quantum dots ; Hollow structure ; Power conversion efficiencies ; Quantum dot solar cells ; Solution methods ; Three-dimensional graphene ; Graphene
  8. Source: Procedia Engineering, 28 June 2015 through 3 July 2015 ; Volume 141 , 2016 , Pages 38-46 ; 18777058 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1877705815030611?via%3Dihub