TBRb

CAS Number 682806-51-5

MSDS

TBRb, yellow dopant material in TADF-OLEDs

High purity dopant used to improve device performance

A family member of tetracene, 2,8-Di-tert-butyl-5,11-bis(4-tert-butylphenyl)-6,12-diphenyltetracene (TBRb) has been widely used as a yellow dopant material in TADF-OLEDs. It is popular because of its bipolar characteristics.

The greater hindrance introduced by four tetra-tert-butyl bulky steric groups (attached to the benzene rings of rubrene) is believed to reduce the chances of concentration-quenching by effectively preventing inter-molecular aggregation of the dopant molecules. In return, this can improve device performance (e.g. in terms of external quantum efficiencies, overall power efficiencies, and lifetime).

General Information

CAS number	682806-51-5
Full name	2,8-Di-tert-butyl-5,11-bis(4-tert-butylphenyl)-6,12-diphenyltetracene
Chemical formula	C₅₈H₆₀
Molecular weight	757.1 g/mol
Absorption	λ_max 306 nm in DCM
Fluorescence	λ_em 571 nm in DCM
HOMO/LUMO	HOMO 5.38 eV, LUMO 3.20 eV [1]
Synonyms	Tetra(t-butyl)rubrene, 2,8-di(t-butyl)-5,11-di[4-(t-butyl)phenyl]-6,12-diphenylnaphthacene
Classification / Family	Tetracene derivatives, Organic electronics, TADF-OLEDs, TADF yellow dopant materials, Sublimed materials.

Product Details

Purity	Sublimed >99.0% (HPLC)
Melting point	TGA: >310 °C (0.5% weight loss)
Appearance	Orange powder/crystals

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials.

Chemical Structure

Device Structure(s)

Device structure	ITO (120 nm)/PEDOT:PSS (60 nm)/TAPC (10 nm)/TCTA (10 nm)/mCP (10 nm)/DPEPO:DMAC-DPS:TBRb (25 nm)/TSPO1 (5 nm)/TPBI (30 nm)/LiF (1 nm)/Al (200 nm) [2]
Colour	White
Max Current Efficiency	39.3 cd/A
Max EQE	17.6%
Max. Power Efficiency	41.0 lm W^-1

Device structure	ITO/TAPC (75 nm)/TCTA (10 nm)/ Ir(ppy)₂tmd+TBRb (30 nm)/B4PYMPM (50 nm)/LiF (0.7 nm)/Al (100 nm) [3]
Colour	Yellow
Max EQE	26.1%
Max. Power Efficiency	114.3 lm W^-1

Device structure	ITO (120 nm)/PEDOT:PSS (60 nm)/mCP (30 nm)/ CzAcSF:TBPe:TBRb (25 nm)/TSPO1 (5 nm)/TPBI (30 nm)/LiF (1 nm)/Al (200 nm) [4]
Colour	White
Max Current Efficiency	35.1 cd/A
Max EQE	14.0%
Max. Power Efficiency	36.2 lm W^-1

Device structure	ITO (95 nm)/HATCN (10 nm)/ TAPC (45 nm)/TCTA (5 nm)/0.4 wt% TBRb: 6 wt% 4CzPN (8 nm)/0.8 wt% TBRb: 10 wt% 4CzPN: mCBP (4 nm)/40 wt% Bepp2: mCBP (5 nm)/Bepp₂ (3 nm)/5 wt% DSA-Ph*: MADN (8 nm)/TmPyPB (50 nm)/LiF (1 nm)/Al (100 nm) [5]
Colour	White
Max Current Efficiency	48.9 cd/A
Max EQE	15.1%
Max. Power Efficiency	47.4 lm W^-1

*For chemical structure information, please refer to the cited references

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>99.0% purity)	M2125A1	250 mg	£310
Sublimed (>99.0% purity)	M2125A1	500 mg	£570
Sublimed (>99.0% purity)	M2125A1	1 g	£950

MSDS Documentation

TBRb MSDS sheet

Literature and Reviews

Highly efficient yellow and white organic electroluminescent devices doped with 2,8-di(t-butyl)-5,11-di[4-(t-butyl)phenyl]-6,12 diphenylnaphthacene, T-H. Liu et al., Appl. Phys. Lett. 85, 4304 (2004); doi: 10.1063/1.1803911.
High efficiency fluorescent white organic light-emitting diodes having a yellow fluorescent emitter sensitized by a blue thermally activated delayed fluorescent emitter, W. Song et al., Org. Electron., 23, 138–143 (2015); doi: 10.1016/j.orgel.2015.04.016.
Highly Efficient, Conventional, Fluorescent Organic Light-Emitting Diodes with Extended Lifetime, H. Kim et al., Adv. Mater., 29, 1702159 (2017); DOI: 10.1002/adma.201702159.

Host Engineering for High Quantum Efficiency Blue and White Fluorescent Organic Light-Emitting Diodes, W. Song et al., Adv. Mater., 27, 4358–4363 (2017); DOI: 10.1002/adma.201501019.
Exciton-Adjustable Interlayers for High Efficiency, Low Efficiency Roll-Off, and Lifetime Improved Warm White Organic Light-Emitting Diodes (WOLEDs) Based on a Delayed Fluorescence Assistant Host, Z. Wang et al., Adv. Funct. Mater., 28, 1706922 (2018); DOI: 10.1002/adfm.201706922.