Sebastian Gorgon

Jun 19, 2024 | nature.com | Hwan-Hee Cho |Sebastian Gorgon |Giacomo Londi |Samuele Giannini |Changsoon Cho |Pratyush Ghosh | +8 more

AbstractThe development of luminescent organic radicals has resulted in materials with excellent optical properties for near-infrared emission. Applications of light generation in this range span from bioimaging to surveillance. Although the unpaired electron arrangements of radicals enable efficient radiative transitions within the doublet-spin manifold in organic light-emitting diodes, their performance is limited by non-radiative pathways introduced in electroluminescence.

May 31, 2024 | onlinelibrary.wiley.com | Qinying Gu |Sebastian Gorgon |Alexander Romanov |Feng LI

Spin triplet exciton formation sets limits on technologies using organic semiconductors that are confined to singlet-triplet photophysics. In contrast, excitations in the spin doublet manifold in organic radical semiconductors can show efficient luminescence. Here we explore the dynamics of the spin allowed process of intermolecular energy transfer from triplet to doublet excitons.

Feb 23, 2024 | nature.com | Junzhi Ye |Aobo Ren |Linjie Dai |Tomi K. Baikie |Renjun Guo |Sebastian Gorgon | +16 more

AbstractPolarized light is critical for a wide range of applications, but is usually generated by filtering unpolarized light, which leads to substantial energy losses and requires additional optics. Here we demonstrate the direct emission of linearly polarized light from light-emitting diodes made of CsPbI3 perovskite nanoplatelet superlattices.

Aug 16, 2023 | nature.com | Sebastian Gorgon |Bluebell H. Drummond |William Myers |Claire Tonnelé |Petri Murto |David Oliete Casanova | +4 more

AbstractMolecules present a versatile platform for quantum information science1,2 and are candidates for sensing and computation applications3,4. Robust spin-optical interfaces are key to harnessing the quantum resources of materials5. To date, carbon-based candidates have been non-luminescent6,7, which prevents optical readout via emission. Here we report organic molecules showing both efficient luminescence and near-unity generation yield of excited states with spin multiplicity S > 1.

Jul 12, 2023 | nature.com | Petri Murto |Weixuan Zeng |Yuqi Sun |Richard H. Friend |Sebastian Gorgon |Erjuan Guo

AbstractNeutral π-radicals have potential for use as light emitters in optoelectronic devices due to the absence of energetically low-lying non-emissive states. Here, we report a defect-free synthetic methodology via mesityl substitution at the para-positions of tris(2,4,6-trichlorophenyl)methyl radical. These materials reveal a number of novel optoelectronic properties.