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Product Code M2125A1-250mg
Price $325 ex. VAT

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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 λmax 306 nm in DCM
Fluorescence λem 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

tbrb chemical structure, 682806-51-5
Chemical structure of TBRb

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 white light emitting device
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 yellow light emitting device
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 white light emitting device
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 white light emitting device
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 £260
Sublimed (>99.0% purity) M2125A1 500 mg £420
Sublimed (>99.0% purity) M2125A1 1 g £700

MSDS Documentation

TBRb MSDSTBRb MSDS sheet

Literature and Reviews

  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. 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.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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