Design and synthesis of indole-substituted fullerene derivatives with different side groups for organic photovoltaic devices

Ning Wang, Xichang Bao, Chunpeng Yang, Jun Wang, Han Young Woo, Zhenggang Lan, Weichao Chen, Renqiang Yang

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

A series of indole-substituted fulleropyrrolidine derivatives with different side groups on a pyrrolidine rings, including methyl (OIMC60P), benzyl (OIBC60P), 2,5-difluoroinebenzyl (OIB2FC60P), and 2,3,4,5,6- pentafluoroinebenzyl (OIB5FC60P), have been synthesized and used as electron acceptor in the active layer of polymer-fullerene solar cells to investigate the effect of various substitute groups on the electronic structures, morphologies, and device performances. Optical absorption, electrochemical properties and solubility of the fullerene derivatives have been explored and compared. The inverted photovoltaic devices with the configuration ITO/ZnO/Poly(3- hexylthiophene)(P3HT):[60]fullerene derivatives/MoO3/Ag have been prepared including the reference cell based on the P3HT: methyl [6,6]-phenyl-C61-butylate (PCBM) blend films. All the devices properties were measured in air without encapsulation. We also investigated the effect of the thermal annealing on the crystallinity and morphology of the active layer and the device performance. The device based on the blend film of P3HT and OIBC60P showed a power conversion efficiency of 2.46% under illumination by AM1.5G (100 mW/cm2) after the annealing treatment at 120 °C for 10 min in air.

Original languageEnglish
Pages (from-to)682-692
Number of pages11
JournalOrganic Electronics
Volume14
Issue number2
DOIs
Publication statusPublished - 2013 Feb

Keywords

  • Electron acceptors
  • Fullerene derivatives
  • Indole
  • Organic photovoltaic devices
  • Thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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