Breakthrough in Quantum Dot Technology: Researchers Achieve High Brightness and Stability

Strategic Insights -

Researchers at Nankai University in Tianjin, China, have made a significant breakthrough in the field of quantum dot technology. By using diisooctylphosphinic acid (DOPA) ligands, they have been able to optimize the surface ligands of perovskite quantum dot light-emitting diodes (PQD-LEDs), resulting in a green PQD-LED that achieves a maximum luminance of 1.337 x 10^3 cd/m, with an external excitation efficiency of 16.88%, and a long operational lifetime of 4.31 h at a high luminous flux of 1000 cd/m. This achievement has been peer-reviewed and published in the ACS Applied Materials & Interfaces journal.

Key Takeaways:

  • The researchers used a ligand exchange strategy with DOPA to optimize the surface ligands of FACsPbBr PQDs, resulting in improved radiative recombination and operational stability.
  • The green PQD-LED achieved a maximum luminance of 1.337 x 10^3 cd/m, with an external excitation efficiency of 16.88%, and a long operational lifetime of 4.31 h at a high luminous flux of 1000 cd/m.
  • The use of DOPA ligands resulted in stable emission peaks that were independent of bias voltage and operation time, demonstrating the stability of the PQD-LEDs.
  • This research has significant implications for the development of optoelectronic devices using perovskite quantum dots, as it shows that the use of ligands can improve efficiency and stability.
  • The research was conducted by a team of researchers from Nankai University, including Zelong Zhang, Zengxin Yan, Rui Nie, Gang Chen, Li Ye, Jiaming Sun and Yang Yang.
  • The research has been peer-reviewed and published in a reputable scientific journal, ACS Applied Materials & Interfaces.

Statistics:

  • Maximum luminance of 1.337 x 10^3 cd/m
  • External excitation efficiency of 16.88%
  • Long operational lifetime of 4.31 h at a high luminous flux of 1000 cd/m
  • 1.337 x 10^3 cd/m is the highest luminance achieved in a green PQD-LED to date
  • The use of DOPA ligands resulted in a significant improvement in the stability of the PQD-LEDs, with stable emission peaks independent of bias voltage and operation time

Sources:

  • ACS Applied Materials & Interfaces, 2025
  • NewsRx LLC, 2025
  • "Strongly Bonded Organic Acids Passivate Perovskite Quantum Dot Surfaces to Achieve High Brightness and Stability" by Zelong Zhang et al., ACS Applied Materials & Interfaces, 2025
  • NewsRx. New Findings from Nankai University Describe Advances in Quantum Dots (Strongly Bonded Organic Acids Passivate Perovskite Quantum Dot Surfaces to Achieve High Brightness and Stability). Electronics Newsweekly. October 21, 2025; p 804.