DBF-TRZ

CAS Number 2040300-54-5

High Purity Sublimed Materials, Host Materials, Materials, OLED Materials, Phosphorescent Host Materials, Semiconducting Molecules, TADF Materials

MSDS

Triazine Derivatives of High Triplet Energy Above 2.8 eV

High purity exciton electron transport type exciton blocking material, sublimed (≥99%)

Specifications | MSDS | Literature and Reviews

DBF-TRZ is a high triplet energy exciton, electron transport type, exciton blocking material primarily developed for blue PHOLEDs to effectively block hole carriers. DBF-TRZ features an electron rich dibenzo-[b,d]furan centre unit and two electron deficient 4,6-diphenyl-1,3,5-triazine moieties. With a high triplet energy above 2.8 eV, known to enhance the external quantum efficiency (EQE) of the blue phosphorescent devices by more than 40% while maintaining operational stability of the devices.

Also, the high triplet energy material has been used in hyper OLEDs to confine the triplet exciton of the MR-TADF dopant materials to achieve narrow green emission band with an LT95 of over 3000 h at 1000 cd m⁻². Electroplex formed between 4,4′-di(9H-carbazol-9-yl)-1,1′-biphenyl (CBP) and DBF-TRZ is engaged as a universal host in red, yellow, green, and blue PhOLEDs for improved efficiency and lifetime.

General Information

CAS Number	2040300-54-5
Chemical Formula	C₄₂H₂₆N₆O
Molecular Weight	630.7 g/mol
Absorption	λ_max N/A
Fluorescence	λ_em N/A
HOMO/LUMO	HOMO = - 6.7 eV, LUMO = - 3.1 eV
Synonyms	DBFTRz, 2,8-Bis(4,6-diphenyl-1,3,5-triazin-2-yl)dibenzo-[b,d]furan
Classification or Family	Triazine derivative, Hole blocking layer (HBL), Universal host, Sublimed materials.

Product Details

Purity	Sublimed (≥99%)
Melting Point	T_d > 370 °C (5% weight loss)
Appearance	white to off-white powder/crystals

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

Chemical Structure

Device Structure(s)

Device Structure	ITO (100 nm)/polymer buffer [13] (20 nm)/NPD (10 nm)/4DBFHPB (10 nm)/mCBP doped with 12 wt.% Ir(ppy)₃ (15 nm)/DBF-TRZ (10 nm)/T3PyTRZ:20 wt.% Liq doped (40 nm)/Liq (1 nm)/Al (100 nm) [1]
Color	Green
Turn-on Voltage (V_on)	2.64 V
Current Efficiency@100 cd m^-2	90.5 cd/A
Power Efficiency@100 cd m^-2	88.1 lm W^-1
EQE@100 cd m^-2	25.1%
LT₅₀@1000 cd m^-2	16,281 h

Device Structure	ITO (100 nm)/polymer buffer [13] (20 nm)/NPD (10 nm)/4DBFHPB (10 nm)/DIC-TRZ doped with 12 wt.% Ir(ppy)₃ (15 nm)/DBF-TRZ (10 nm)/T3PyTRZ:20 wt.% Liq doped (40 nm)/Liq (1 nm)/Al (100 nm) [1]
Color	Green
Turn-on Voltage (V_on)	2.18 V
Current Efficiency@100 cd m^-2	81.9 cd/A
Power Efficiency@100 cd m^-2	104.9 lm W^-1
EQE@100 cd m^-2	22.9%
LT₅₀@1000 cd m^-2	31,662 h

Device Structure	ITO (100 nm)/Polymer Buffer (20 nm)/NPD (10 nm)/4DBFHPB (10 nm)/DIC-TRZ:20 wt.% Ir(ppy)₃: 5 wt.% RPXZ-tCzBN (30 nm)/DBF-TRZ (10 nm)/20 wt.% Liq-doped T3PyTRZ (40 nm)/Liq (1 nm)/Al [2]
Color	Green
Turn-on Voltage (V_on)	2.15 V
Max Current Efficiency	110.6 cd/A
Max Power Efficiency	150.3 lm W^-1
Max EQE	27.6%
LT₉₅/LT₉₀@1000 cd m^-2	3002/8632 h

MSDS Documentation

DBF-TRZ MSDS Sheet

Literature and Reviews

Y. Kang et al. (2016); High triplet energy electron transport type exciton blocking materials for stable blue phosphorescent organic light-emitting diodes, Org. Electron., 32, 109-114; DOI: 10.1016/j.orgel.2016.02.025.
W. Song et al. (2017); High triplet energy exciplex hosts for deep blue phosphorescent organic light-emitting diodes, J. Mater. Chem. C, 5, 5923-5929; DOI: 10.1039/C7TC01552F.
T. Kawano et al. (2023); Tetrapyridine/triphenyltriazine-conjugated electron transporters for low-power-consumption, high-stability phosphorescent OLEDs, J. Mater. Chem. C, 11, 4129-4135; DOI: 10.1039/d2tc04647d.

H. Nemma et al. (2025); π-Extended Phenoxazine-Based Asymmetric MR-TADF Emitters for Narrow Emission Band Green OLEDs with a Power Efficiency of 150 lm W−1, an EQE of 27%, and an LT95 of Over 3000 h at 1000 cdm−2, Adv. Optical Mater., 13, 2402131; DOI: 10.1002/adom.202402131.
S. Hwang et al. (2020); Conformation-dependent degradation of thermally activated delayed fluorescence materials bearing cycloamino donors, Commun. Chem., 3, 53; DOI: 10.1038/s42004-020-0303-4.
W. Song et al. (2017); Electroplex as a New Concept of Universal Host for Improved Efficiency and Lifetime in Red, Yellow, Green, and Blue Phosphorescent Organic Light-Emitting Diodes, Adv. Sci., 5 (2), 1700608; DOI: 10.1002/advs.201700608.

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