Rapid thermal annealed WO 3-doped In 2O 3 films for transparent electrodes in organic photovoltaics

Jun Ho Kim, Yong Hee Shin, Tae Yeon Seong, Seok In Na, Han Ki Kim

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We investigated the effect of rapid thermal annealing (RTA) on the electrical, optical, structural and surface properties of WO 3-doped In 2O 3 (IWO) films for use in organic solar cells (OSCs). Increasing the RTA temperature led to significant decreases in resistivity and sheet resistance due to activation of the W dopants and the (222) preferred orientation of the IWO films. At the optimized RTA temperature of 500°C, the IWO film had a sheet resistance of 21Ω/square and an optical transmittance of 89.39%, which is comparable to conventional ITO electrodes. Due to the high mobility of 46cm 2V 1s 1, the IWO film showed a higher optical transmittance in the near infrared wavelength region even though it had a low resistivity of 4.34×10 4Ω cm. Furthermore, the 500°C annealed IWO film showed very smooth surface morphology due to its (222) preferred orientation. The performance (fill factor of 61.59%, short circuit current of 8.84mAcm 2, open circuit voltage of 0.60V and power conversion efficiency of 3.27%) of the OSC fabricated with the IWO electrode was nearly identical to that of the OSC with a reference ITO anode, indicating that the IWO anode is a promising high-mobility transparent electrode material to replace conventional ITO anodes for high-performance OSCs.

Original languageEnglish
Article number395104
JournalJournal of Physics D: Applied Physics
Volume45
Issue number39
DOIs
Publication statusPublished - 2012 Oct 3

Fingerprint

Rapid thermal annealing
solar cells
Electrodes
ITO (semiconductors)
electrodes
Anodes
anodes
Sheet resistance
Opacity
annealing
transmittance
electrical resistivity
Open circuit voltage
short circuit currents
electrode materials
open circuit voltage
Short circuit currents
surface properties
Conversion efficiency
Surface properties

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

Rapid thermal annealed WO 3-doped In 2O 3 films for transparent electrodes in organic photovoltaics. / Kim, Jun Ho; Shin, Yong Hee; Seong, Tae Yeon; Na, Seok In; Kim, Han Ki.

In: Journal of Physics D: Applied Physics, Vol. 45, No. 39, 395104, 03.10.2012.

Research output: Contribution to journalArticle

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