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Monomer-mixed hole transport layers for improving hole injection of quantum dot light-emitting diodes
  • Author Y. Kim, H. Park, J. Yoon, H. Yoon, S. Jeong, D. Kim, and Y. Hong*
  • Journal Optics Express
  • Vol 31
  • Issue 13
  • Page 20730-20739
  • Year 2023
  • Link #1 https://doi.org/10.1364/OE.493134
 
Abstract
Quantum-dot light-emitting diodes (QLEDs) are promising components for next-generation displays and related applications. However, their performance is critically limited by inherent hole-injection barrier caused by deep highest-occupied molecular orbital levels of quantum dots. Herein, we present an effective method for enhancing the performance of QLEDs by incorporating a monomer (TCTA or mCP) into hole-transport layers (HTL). The impact of different monomer concentrations on the characteristics of QLEDs were investigated. The results indicate that sufficient monomer concentrations improve the current efficiency and power efficiency. The increased hole current using monomer-mixed HTL suggests that our method holds considerable potential for high-performance QLEDs.
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