Interfacial energy level alignments between low-band-gap polymer PTB7 and indium zinc oxide anode

Dongguen Shin, Jeihyun Lee, Soohyung Park, Junkyeong Jeong, Ki Won Seo, Hyo Joong Kim, Han Ki Kim, Min Jun Choi, Kwun Bum Chung, Yeonjin Yi

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The interfacial energy level alignments between poly(thieno[3,4-b]-thiophene)-co-benzodithiophene (PTB7) and indium zinc oxide (IZO) were investigated. In situ ultraviolet photoemission spectroscopy measurements were conducted with the step-by-step deposition of PTB7 on IZO substrate. All spectral changes were analyzed between each deposition step, and interfacial energy level alignments were estimated. The hole barrier of standard ultraviolet-ozone treated IZO is 0.58 eV, which is lower than the value of 1.09 eV obtained for bare IZO. The effect of barrier reduction on the hole transport was also confirmed with electrical measurements of hole-dominated devices.

Original languageEnglish
Article number095701
JournalApplied Physics Express
Volume8
Issue number9
DOIs
Publication statusPublished - 2015 Sep 1

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Interfacial energy level alignments between low-band-gap polymer PTB7 and indium zinc oxide anode'. Together they form a unique fingerprint.

Cite this