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Product Code M2517A1-250mg
Price $959

MR-TADF Green Dopant with a DiKTa Core

High purity sublimed narrowband MR-TADF emitter for highly efficient OLEDs, Sublimed ≥99.0%


Specification | MSDS | Literature and Reviews


3TPA-DiKTa is a multiple resonance thermally activated delayed fluorescence (MR-TADF) green emitter with three electron donating triphenylamine (TPA) units attached at the opposite positions to the central nitrogen of the quinolino[3,2,1-de]acridine-5,9-dione (DiKTa) core.

TADF device based on 3TPA-DiKTa shows very high EQEmax of 30.8% at 552 nm (FWHM of 62 nm) when doped into 1,3-bis(N-carbazolyl) benzene (mCP), a maximum current efficiency (CEmax) of 117 cd/A, and maximum power efficiency (PEmax) of 108 lm W at 1.45 cd m-2.

When 4CzIPN is used as an assistant dopant, hyperfluorescence (HF) device based on 3TPA-DiKTa shows significantly improved efficiency roll-off and higher brightness. TADF-sensitized-fluorescence HF device demonstrates higher maximum luminance of 112,190 cd m-2 with low efficiency roll-off.

MR-TADF red emitter 3DPA-DiKTa and blue emitter Mes3DiKTa are also available from us.

General Information


CAS Number N/A
Chemical Formula C74H50N4O2
Molecular Weight 1027.21 g/mol
Absorption λmax 494 nm (in toluene)
Fluorescence λem 551 nm (in film)
HOMO/LUMO HOMO = - 5.27 eV, LUMO = - 2.98 eV; ΔEST = 0.13 eV [1]
Synonyms 3,7,11-Tris(4-(diphenylamino)phenyl)quinolino[3,2,1-de]acridine-5,9-dione
Classification or Family DiKTa derivatives, Triphenylamines (TPA), Green dopant, Multiresonance thermally activated delayed fluorescent (MR-TADF), Sublimed materials.

Product Details


Purity Sublimed* >99% (HPLC)
Melting Point Mp > 400 °C
Appearance Bright yellow powder/crystals

* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials for OLED devices.

Chemical Structure


Chemical structure of 3TPA-DiKTa
3TPA-DiKTa chemical structure

Device Structure(s)


Device Structure ITO (112 nm)/HHATCN (5 nm)/TAPC (40 nm)/TCTA (10 nm)/mCP (10 nm)/2.0 wt.% 3TPA-DiKTa:mCP (20 nm)/TmPyPB (50 nm)/LiF (0.6 nm)/Al (100 nm) [1]
Color green light emitting device Green light emission at 551 nm
FWHM 62 nm
Max Luminance 36,400 cd m-2
CIE Coordinates (0.409, 0.577)
Max Current Efficiency 117 cd/A
Max Power Efficiency 108 lm/W
Max EQE 30.8%
Device Structure ITO/HATCN (5 nm)/TAPC (40 nm)/TCTA (10 nm)/mCP (10 nm)/10 wt % 4CzIPN and 2 wt. %  3TPA-DiKTa in mCP (20 nm)/TmPyPB (50 nm)/LiF (0.6 nm)/Al (100 nm) [1]
Color green light emitting device Green light emission at 556 nm
FWHM 70 nm
Max Luminance 112,190 cd m-2
CIE Coordinates (0.424, 0.551)
Max Current Efficiency 106 cd/A
Max Power Efficiency 111 lm/W
Max EQE 30.0%

MSDS Documentation


3TPA-DiKTa MSDS Sheet3TPA-DiKTa MSDS Sheet

Literature and Reviews


  1. S. Wu et al. (2022); Highly Efficient Green and Red Narrowband Emissive Organic Light-Emitting Diodes Employing Multi-Resonant Thermally Activated Delayed Fluorescence Emitters, Angew. Chem. Int. Ed., 61 (52), e202213697; DOI: 10.1002/ange.202213697.
  2. J. Wang et al. (2024); Highly efficient organic light-emitting diodes and light-emitting electrochemical cells employing multiresonant thermally activated delayed fluorescent emitters with bulky donor or acceptor peripheral groups, Aggregate, 5 (5), e571; DOI: 10.1002/agt2.571.
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