Circularly polarized electroluminescence from chiral supramolecular semiconductor thin films
University of Cambridge · Eindhoven University of Technology · +5 more institutions
Abstract
Current organic light-emitting diode (OLED) technology uses light-emitting molecules in a molecular host. We report green circularly polarized luminescence (CPL) in a chirally ordered supramolecular assembly, with 24% dissymmetry in a triazatruxene (TAT) system. We found that TAT assembled into helices with a pitch of six molecules, associating angular momentum to the valence and conduction bands and obtaining the observed CPL. Cosublimation of TAT as the "guest" in a structurally mismatched "host" enabled fabrication of thin films in which chiral crystallization was achieved in situ by thermally triggered nanophase segregation of dopant and host while preserving film integrity. The OLEDs showed external…
Citation impact
- FWCI
- 59.12
- Percentile
- 100%
- References
- 64
Authors
24Topics & keywords
- Electroluminescence
- Materials science
- OLED
- Luminescence
- Supramolecular chemistry
- Dopant
- Optoelectronics
- Diode
Funding
- BABill and Melinda Gates FoundationAward: OPP1144
- DLDiamond Light Source
- URUK Research and InnovationAwards: OPP1144, MR/V023926/1
- NONederlandse Organisatie voor Wetenschappelijk OnderzoekAwards: KICH1.ED02.20.007, 024.001.035
- CTCambridge Trust
- EAEngineering and Physical Sciences Research CouncilAwards: OPP1144, EP/W017091, EP/W017091/1, MR/V023926/1
- HMH2020 Marie Skłodowska-Curie ActionsAwards: 101022365, 859752, 758826, Horizon 2020