Multilayer Transfer Printing for Pixelated, Multicolor Quantum Dot Light-Emitting Diodes

Bong Hoon Kim, Sooji Nam, Nuri Oh, Seong Yong Cho, Ki Jun Yu, Chi Hwan Lee, Jieqian Zhang, Kishori Deshpande, Peter Trefonas, Jae Hwan Kim, Jungyup Lee, Jae Ho Shin, Yongjoon Yu, Jong Bin Lim, Sang M. Won, Youn Kyoung Cho, Nam Heon Kim, Kyung Jin Seo, Heenam Lee, Tae Il KimMoonsub Shim*, John A. Rogers

*Corresponding author for this work

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

Here, we report multilayer stacking of films of quantum dots (QDs) for the purpose of tailoring the energy band alignment between charge transport layers and light emitting layers of different color in quantum dot light-emitting diodes (QD LED) for maximum efficiency in full color operation. The performance of QD LEDs formed by transfer printing compares favorably to that of conventional devices fabricated by spin-casting. Results indicate that zinc oxide (ZnO) and titanium dioxide (TiO2) can serve effectively as electron transport layers (ETLs) for red and green/blue QD LEDs, respectively. Optimized selections for each QD layer can be assembled at high yields by transfer printing with sacrificial fluoropolymer thin films to provide low energy surfaces for release, thereby allowing shared common layers for hole injection (HIL) and hole transport (HTL), along with customized ETLs. This strategy allows cointegration of devices with heterogeneous energy band diagrams, in a parallelized scheme that offers potential for high throughput and practical use.

Original languageEnglish (US)
Pages (from-to)4920-4925
Number of pages6
JournalACS nano
Volume10
Issue number5
DOIs
StatePublished - May 24 2016

Keywords

  • energy band diagram
  • light-emitting diode
  • quantum dots
  • transfer printing

ASJC Scopus subject areas

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

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    Kim, B. H., Nam, S., Oh, N., Cho, S. Y., Yu, K. J., Lee, C. H., Zhang, J., Deshpande, K., Trefonas, P., Kim, J. H., Lee, J., Shin, J. H., Yu, Y., Lim, J. B., Won, S. M., Cho, Y. K., Kim, N. H., Seo, K. J., Lee, H., ... Rogers, J. A. (2016). Multilayer Transfer Printing for Pixelated, Multicolor Quantum Dot Light-Emitting Diodes. ACS nano, 10(5), 4920-4925. https://doi.org/10.1021/acsnano.5b06387