High-performance of PEDOT/PSS free organic solar cells on an air-plasma-treated ITO substrate

Jong Kil Choi, Ming Liang Jin, Cheng Jin An, Dae Woo Kim, Hee Tae Jung

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In this work, we demonstrate the high-performance of a PEDOT:PSS free organic photovoltaic cell (OPVC) using an air-plasma modified ITO surface, followed by controlled solvent evaporation and annealing of the P3HT:PCBM photoactive layer. Ultraviolet photoelectron spectroscopy (UPS), X-ray photoelectron spectroscopy (XPS), and conductive atomic force microscopy (c-AFM) results show that the work function of ITO was increased to as high as that of PEDOT:PSS (5.2 eV) after air-plasma treatment, along with significantly enhanced electrical homogeneity. From the dynamic secondary ion mass spectroscopy (DSIMS) results, we confirm that the thermodynamic stability of the slow-dried active layer is attributed to the uniform vertical compositional distribution on the air plasma treated ITO surface, even after thermal annealing at 150 °C for 10 min. The resulting device has an open-circuit voltage of 0.65 V, a fill factor of 63%, and a power conversion efficiency of 3.38%, providing a high performance PEDOT:PSS free OPVC device.

Original languageEnglish
Pages (from-to)11047-11053
Number of pages7
JournalACS Applied Materials and Interfaces
Volume6
Issue number14
DOIs
Publication statusPublished - 2014 Jul 23

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this