Vertical concentration gradients in bulk heterojunction solar cells induced by differential material solubility

Diana K. Susarova, Pavel A. Troshin, Yuriy L. Moskvin, Sergey D. Babenko, Vladimir F. Razumov

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Highly soluble fullerene derivatives (HSFD) and a low soluble polymer (LSP) were investigated as modifiers of the active layer morphology in conventional P3HT/PCBM bulk heterojunction solar cells. The observed changes in photovoltaic and electrical characteristics of the devices after addition of one or two modifiers suggest that they induced favourable vertical phase separation in the blends simply due to different solubilities of the components. In particular, HSFD is supposed to accumulate at the top of the film serving as a hole-blocking interlayer at the cathode/active layer interface. On the contrary, LSP seems to form electron-blocking buffer layer at the bottom of the device at the active layer/anode interface. Thus, the differential material solubility was suggested as a tool for adjustment of vertical morphology of organic bulk heterojunction solar cells.

Original languageEnglish
Pages (from-to)4132-4135
Number of pages4
JournalThin Solid Films
Volume519
Issue number12
DOIs
Publication statusPublished - 1 Apr 2011
Externally publishedYes

Keywords

  • Composites
  • Organic solar cells
  • Polymers
  • Thin films

Fingerprint

Dive into the research topics of 'Vertical concentration gradients in bulk heterojunction solar cells induced by differential material solubility'. Together they form a unique fingerprint.

Cite this