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, Garry 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 1 2008

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Keywords

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

ASJC Scopus subject areas

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

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