Heterogeneous Integration of Microscale GaN Light-Emitting Diodes and Their Electrical, Optical, and Thermal Characteristics on Flexible Substrates

Lizhu Li, Changbo Liu, Yuanzhe Su, Junchun Bai, Jianqiu Wu, Yanjun Han, Yubin Hou, Shuxian Qi, Yu Zhao, He Ding, Yifei Yan, Lan Yin, Pu Wang, Yi Luo, Xing Sheng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

Materials and device strategies to form inorganic, thin-film, microscale light-emitting diodes (micro-LEDs) are presented based on a simplified release method. High performance gallium nitride based blue micro-LEDs are fabricated on and released from both patterned sapphire substrates (PSSs) and conventional nonpatterned sapphire substrates (CSSs). Micro-LEDs are transferred onto copper and polyimide based flexible substrates and their electrical and optical performances are maintained. Thermal properties of PSS and CSS based micro-LEDs are systematically explored on different substrates. Finally, micro-LEDs combined with phosphor coatings demonstrate capability for polychromatic emission. The techniques presented here provide promising paths to advanced light sources with potential applications in lighting, displays, and biomedicine.

Original languageEnglish
Article number1700239
JournalAdvanced Materials Technologies
Volume3
Issue number1
DOIs
Publication statusPublished - Jan 2018
Externally publishedYes

Keywords

  • flexible devices
  • indium gallium nitride
  • laser liftoff
  • microscale LEDs
  • transfer printing

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Li, L., Liu, C., Su, Y., Bai, J., Wu, J., Han, Y., Hou, Y., Qi, S., Zhao, Y., Ding, H., Yan, Y., Yin, L., Wang, P., Luo, Y., & Sheng, X. (2018). Heterogeneous Integration of Microscale GaN Light-Emitting Diodes and Their Electrical, Optical, and Thermal Characteristics on Flexible Substrates. Advanced Materials Technologies, 3(1), Article 1700239. https://doi.org/10.1002/admt.201700239