Effect of light irradiation on the diffusion rate of the charge carrier hopping mechanism in p3ht–zno nanoparticles studied by µ+sr

Eka Pratikna, Lusi Safriani, Nowo Riveli, Budi Adiperdana, Suci Winarsih, Annisa Aprilia, Dita Puspita Sari, Isao Watanabe, Risdiana Risdiana

Research output: Contribution to journalArticlepeer-review

Abstract

Blended regio-regular P3HT–ZnO nanoparticles are a hybrid material developed as an active layer for hybrid solar cells. The study of the hopping mechanisms and diffusion rates of regio-regular P3HT–ZnO nanoparticles is significant for obtaining intrinsic charge transport properties that provide helpful information for preparing high-performance solar cells. The temperature depen-dences of the parallel and perpendicular diffusion rates in regio-regular P3HT–ZnO nanoparticles determined from muon spin relaxation measurements were investigated by applying various longi-tudinal fields. We investigated the effect of light irradiation on the diffusion rates in regio-regular P3HT–ZnO nanoparticles. We found that with increasing temperature, the parallel diffusion rate decreased, while the perpendicular diffusion rate increased. The ratio of the parallel to perpendicular diffusion rate (D /D) can be used to indicate the dominant charge carrier hopping mechanism. Without light irradiation, perpendicular diffusion dominates the charge carrier hopping, starting at 25 K, with a ratio of 1.70 × 104, whereas with light irradiation, the perpendicular diffusion of the charge carrier starts to dominate at the temperature of 10 K, with a ratio of 2.40 × 104. It is indicated that the additional energy from light irradiation affects the diffusion, especially the charge diffusion in the perpendicular direction.

Original languageEnglish
Article number6730
JournalEnergies
Volume14
Issue number20
DOIs
Publication statusPublished - 2021 Oct 1

Keywords

  • Diffusion rate
  • Hybrid solar cells
  • LF-µSR
  • Light irradiation
  • P3HT–ZnO nanoparticles

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

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