TBRb


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Order Code: M2125A1

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
Fluorescene 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 99.76% (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 for OLED devices page.

 

tbrb chemical structure, 682806-51-5
Chemical structure of TBRb; CAS No. 682806-51-5.

 

Applications

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).

 

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
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
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
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
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

 

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.