Enhanced absorbance and electron collection in inverted organic solar cells: Optical admittance and transient photocurrent analyses

Zhiming Kam, Qingyi Yang, Xizu Wang, Bo Wu, Fu Rong ZHU*, Jie Zhang, Jishan Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Optical admittance analysis reveals that light absorption in inverted organic solar cells (OSCs), based on the same polymer blend layer of regio-regular poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM), is always greater than their regular geometry OSCs fabricated using an ITO/poly(3,4-ethylene dioxythiophene):(polystyrene sulfuric acid) anode. Transient photocurrent measurements elucidate that interfacial exciton dissociation at the cathode interfaces of Al-modified ITO/PCBM (inverted cell) and Al/PCBM (regular cell) is not equivalent. It is shown that the reverse configuration allows improving the absorbance of the cell, favoring charge collection at cathode/PCBM interface and also possessing a dawdling degradation behavior as compared to a control regular OSC in the accelerated aging test.

Original languageEnglish
Pages (from-to)1306-1311
Number of pages6
JournalOrganic Electronics
Volume15
Issue number7
DOIs
Publication statusPublished - Jul 2014

Scopus Subject Areas

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

User-Defined Keywords

  • Lifetime
  • Optical admittance analysis
  • Organic solar cells
  • Transient photocurrent

Fingerprint

Dive into the research topics of 'Enhanced absorbance and electron collection in inverted organic solar cells: Optical admittance and transient photocurrent analyses'. Together they form a unique fingerprint.

Cite this