Nanophotonic radiative decay rate engineering for stable, phosphorescent emission of blue light

The radiative and non-radiative decay rate of phosphorescent emitting materials can be tuned by the geometry of the nanostructure (NP).

Invention Summary:

Blue-emitting, phosphorescent organic light emitting diodes (OLEDs) have high efficiency but low stability. As a result, the less efficient fluorescent materials are typically used in OLEDs to extend device lifetime. Much effort has focused on developing new, phosphorescent materials with increased intrinsic stability.

Researchers at Rutgers have instead used an extrinsic approach to increasing stability of blue OLEDs. The presence of photonic or plasmonic nanostructures near the emitting material alters its optical environment. In particular, these nanostructures increase the stability of blue OLEDs by increasing the radiative decay rate of phosphorescent materials.

If the blue phosphorescent OLEDs were stable enough to incorporate into displays, there would be a 30% reduction in power consumption, leading to great cost savings.

Market Applications:

  • Blue OLEDs
    • Displays
    • Lighting
  • Bioimaging
  • Single molecule spectroscopy       


  • Increased stability of blue phosphorescent materials
  • Increased efficiency compared to blue fluorescent materials
  • Longer device lifetime
  • Reduced power consumption
  • Top-down or bottom-up fabrication
  • Incorporation of known emitting materials

Intellectual Property & Development Status:

Patent pending. Available for licensing and/or research collaboration.

Rutgers ID: 2016-157
Physical Sciences
Kholud Dardir
Deirdre O'carroll