Opendata, web and dolomites


Highly Efficient Photoemitters for Light-Emitting Diodes Based on Intramolecular Rotation

Total Cost €


EC-Contrib. €






 ROLEDS project word cloud

Explore the words cloud of the ROLEDS project. It provides you a very rough idea of what is the project "ROLEDS" about.

accessed    microsecond    smartphones    electroluminescent    reached    world    emitting    ligands    discussed    brighter    uk    light    worldwide    below    slot    techniques    photo    hd    displays    linear    compounds    quantum    efficient    100    discovered    fast    tv    incorporation    sub    first    tvs    prototypes    sinks    rotationally    lighting    efficiency    brightness    structure    types    processed    inverted    organic    external    spin    discovery    certain    iridium    market    until    rotation    lifetimes    harvested    pct    gold    cheap    protected    molecular    copper    harvesting    fabrication    record    rasi    patent    device    give    replacements    screen    materials    industry    triplet    billion    silver    flexible    carbene    suitable    internal    realization    dollar    earth    desirable    emission    diodes    times    singlet    inversion    yield    oleds    solution    display    class    ipr    energy    mechanism    theoretical    rarest    flat    27    excitation    excited    complexes    emitters   

Project "ROLEDS" data sheet

The following table provides information about the project.


Organization address
postcode: NR4 7TJ

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Total cost 149˙115 €
 EC max contribution 149˙115 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-PoC
 Funding Scheme ERC-POC
 Starting year 2017
 Duration (year-month-day) from 2017-07-01   to  2018-12-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITY OF EAST ANGLIA UK (NORWICH) coordinator 149˙115.00


 Project objective

'We have discovered a new class of photo- and electroluminescent complexes which are suitable for incorporation into organic light emitting diodes (OLEDs) and which give up to 100% internal quantum yield. The new compounds are particularly suitable for the fabrication of OLEDs via cheap solution-processing techniques and have so far reached 27% external quantum efficiency, a record for any solution-processed device. The new complexes have a linear, rotationally flexible structure, and it is this rotation that allows 100% of the excitation energy to be harvested, by a new emission mechanism (“rotationally accessed spin-state inversion”, RASI). OLEDs are widely used as flat-screen displays (TVs, smartphones), a multi-billion dollar market worldwide. The industry-leading emitters are based on complexes of iridium, one of the rarest elements on earth. Our emitters are compounds of copper, silver and gold, suitable as “slot-in” replacements of iridium. IPR is protected by two UK and one PCT World patent applications. The key discovery is that in certain types of coordination complexes based on carbene ligands the excited singlet state sinks below the excited triplet state during molecular rotation. To our knowledge this is the first realization of 'spin-state inverted' materials, until now discussed only as a theoretical concept. The result is efficient, very fast light harvesting with highly desirable short (sub-microsecond) excitation lifetimes, leading to high display brightness (in prototypes 20 times brighter than a HD TV screen), with potential lighting applications.'

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