Temperature and light dependent diode current in high-efficiency solution-processed small-molecule solar cells

V. V. Brus, A. K.K. Kyaw, P. D. Maryanchuk, J. Zhang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

This paper reports on the detail analysis of the DC electrical and photoelectrical properties of the high-efficient (η = 8.01% under standard 100 mW/cm2 AM1.5 illumination) small molecule bulk heterojunction (SM BHJ) solar cells p-DTS(FBTTh2)2/PC70BM. In this SM BHJ solar cell, the dark diode current is determined by the multistep tunnel-recombination via interface states at low forward bias (V < 0.65 V) and the interface state assisted thermionic emission at high forward bias (V > 0.65 V). The effect of illumination on the diode current was also quantitatively investigated. It was observed a reduced Shockley-Read-Hall recombination via interface states at large forward bias (from the maximum power point to the open-circuit conditions). The expression of the load I-V characteristic of the illuminated high-efficient SM BHJ solar cells was derived in the presence of the light dependent series and shunt resistance.

Original languageEnglish
Pages (from-to)2141-2147
Number of pages7
JournalOrganic Electronics
Volume15
Issue number9
DOIs
Publication statusPublished - Sep 2014
Externally publishedYes

Keywords

  • Bulk heterojunction
  • Current transport
  • Solar cell
  • Surface states

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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