Towards optimization of device performance in conjugated polymer photovoltaics: Charge generation, transfer and transport in poly(p-phenylene-vinylene) polymer heterojunctions

Stephanie V. Chasteen, Veronica Sholin, Sue A. Carter, Gary Rumbles

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We fabricate photovoltaics comprised layers and blends of a hole-transporting derivative of poly(p-phenylene-vinylene) with a variety of electron-transporters: titanium dioxide, a cyano-substituted PPV, and a fullerene derivative (PCBM) to enhance device performance. Photovoltaic device characterization is combined with time-resolved and steady-state photoluminescence to understand the nature of the excited state and its effect upon device performance. We find that morphological differences, such as chain conformation or domain size, often overshadow the effect of charge transfer, so that device performance is not necessarily correlated with rapid decay times. Exciton generation is found to be a similarly important factor in most devices. These results provide insight into non-optimized device morphologies.

Original languageEnglish
Pages (from-to)651-659
Number of pages9
JournalSolar Energy Materials and Solar Cells
Volume92
Issue number6
DOIs
Publication statusPublished - Jun 2008

Fingerprint

Conjugated polymers
Heterojunctions
Polymers
Fullerenes
Derivatives
Excited states
Excitons
Titanium dioxide
Conformations
Charge transfer
Photoluminescence
Electrons
poly(4-phenylenevinylene)
LDS 751
titanium dioxide

Keywords

  • Fullerene
  • Heterojunction
  • Organic photovoltaic
  • Photoluminescence
  • Time-resolved

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films

Cite this

Towards optimization of device performance in conjugated polymer photovoltaics : Charge generation, transfer and transport in poly(p-phenylene-vinylene) polymer heterojunctions. / Chasteen, Stephanie V.; Sholin, Veronica; Carter, Sue A.; Rumbles, Gary.

In: Solar Energy Materials and Solar Cells, Vol. 92, No. 6, 06.2008, p. 651-659.

Research output: Contribution to journalArticle

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