Enhanced performance of organic solar cell doped with gold nanorods into hole transporting layer

Aniket Rana, Richa Baronia, Renu Pasricha, Rajiv K. Singh

Research output: Contribution to journalArticle

Abstract

A route to enhancing the efficiency of organic solar cells (OSCs) is the incorporation of gold (Au) nanoparticles into the hole transport layer poly(3, 4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS). The improved performance of OSCs after incorporation of gold nanorods (AuNRs) into the PEDOT:PSS layer has been investigated both experimentally and theoretically. The results reveal that the role of the optical properties of AuNRs has been proven to be minor compared to their electrical properties in the improvement of the power conversion efficiency (PCE) of OSCs. The work-function of AuNRs along with the increased interfacial area between the active layer/PEDOT:PSS after doping is an important factor in enhancing the PCE of OSCs. Simulation of two dimensional electric field distributions using the finite difference time domain (FDTD) method shows a small increment in the absorption spectrum of the active layer after incorporation of AuNRs. An improvement in recombination resistance from impedance spectroscopy study and a reduced ideality factor from the dark current-voltage characteristics of AuNR-doped OSCs demonstrate the progress in efficient internal charge transfer and reduction in recombination mechanism. The overall impact of doping primarily enhances the fill factor of OSCs, which leads to an improvement in efficiency from 1.76 to 2.73%.

Original languageEnglish (US)
Article number045506
JournalMaterials Research Express
Volume1
Issue number4
DOIs
StatePublished - Dec 1 2015

Fingerprint

Nanorods
Gold
Styrene
Conversion efficiency
Doping (additives)
Dark currents
Finite difference time domain method
Current voltage characteristics
Organic solar cells
Charge transfer
Absorption spectra
Electric properties
Optical properties
Electric fields
Spectroscopy
Nanoparticles
poly(3,4-ethylene dioxythiophene)

Keywords

  • FDTD
  • Gold nanorods
  • Impedance spectroscopy
  • Organic solar cell

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Metals and Alloys

Cite this

Enhanced performance of organic solar cell doped with gold nanorods into hole transporting layer. / Rana, Aniket; Baronia, Richa; Pasricha, Renu; Singh, Rajiv K.

In: Materials Research Express, Vol. 1, No. 4, 045506, 01.12.2015.

Research output: Contribution to journalArticle

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