BTB

CAS Number 266349-83-1

MSDS

BTB, ETL material in highly efficient OLED devices

Phosphorescent host material for green and red LEDs

BTB, a triazine compound, namely 4,4'-bis(4,6-diphenyl-1,3,5-triazin-2-yl)biphenyl, is used as an electron-transport material in organic light-emitting devices (OLEDs) due to its electron deficiency from the two triazine units.

With electron mobility greater than 10⁻⁴ cm²V⁻¹ s⁻¹, BTB demonstrates an electron mobility 10-fold greater than that of the widely-used material tris(8-hydroxyquinoline) aluminum (Alq₃). OLEDs incorporating BTB as the electron transport layer exhibit lower driving voltages and higher efficiencies - relative to those incorporating Alq₃.

BTB, like other electron-deficient materials (such as T2T), can be used as a phosphorescent host material for green and red light-emitting diodes.

General Information

CAS number	266349-83-1
Full name	4,4'-bis(4,6-diphenyl-1,3,5-triazin-2-yl)biphenyl, 4,4'-bis-[2-(4,6-diphenyl-1,3,5-triazinyl)]-1,10-biphenyl
Chemical formula	C₃₄H₂₈N₆
Molecular weight	520.62 g/mol
Absorption	n.a.
Fluorescence	n.a.
HOMO/LUMO	HOMO = 6.18 eV, LUMO = 2.14 eV [1]
Classification / Family	Triazine derivatives, Electron-transport layer (ETL) materials, Hole-blocking layer (HBL) materials, TADF materials.

Product Details

Purity	Sublimed > 99% (LCMS)
Melting point	362 °C (lit.); Tg = 137 °C
Appearance	White crystals/powder

Chemical Structure

Device Structure(s)

Device structure	Al/NPD (40 nm)/CPCBPTz:Ir(mppy)3 (10 vol.%, 30 nm)/BTB* (30 nm)/LiQ (0.8 nm)/Al (80 nm) [1]
Colour	Green
Max. Power Efficiency	25.5. ± 9.1 lm W⁻¹
Max. Current Efficiency	20.3 ± 6.6 cd/A
Max. EQE	8.2 ± 0.9%

Device structure	Al/NPD (40 nm)/CPCBPTz:Ir(mppy)3 (10 vol.%, 15 nm)/BCzPh:Ir(mppy)3 (10 vol.%, 15 nm)/BTB* (30 nm)/LiQ (0.8 nm)/Al (80 nm) [1]
Colour	Green
Max. Power Efficiency	23.8 ± 3.6 lm W⁻¹
Max. Current Efficiency	15.4 ± 0.8 cd/A
Max. EQE	8.5 ± 0.4%

Device structure	ITO/NPB (60 nm)/Alq₃:0.6 wt% C545T (15 nm)/BTB (45 nm)/Mg:Ag [2]
Colour	Green
Max. Power Efficiency	10.18 lm W⁻¹
Max. Current Efficiency	10.53 cd/A

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>99% purity)	M2179A1	100 mg	£250
Sublimed (>99% purity)	M2179A1	250 mg	£500
Sublimed (>99% purity)	M2179A1	500 mg	£900
Sublimed (>99% purity)	M2179A1	1 g	£1500

MSDS Documentation

BTB MSDS sheet

Literature and Reviews

Mapping Recombination Profiles in Single-, Dual-, and Mixed-Host Phosphorescent Organic Light Emitting Diodes, P. Kuttipillai et al., Org. Electron., 57, 28-33 (2018); 10.1016/j.orgel.2018.02.025.
High electron mobility triazine for lower driving voltage and higher efficiency organic light emitting devices, R. Klenkler et al., Org. Electron., 9, 285–290 (2008); doi: 10.1016/j.orgel.2007.11.004.
1,3,5-Triazine derivatives as new electron transport–type host materials for highly efficient green phosphorescent OLEDs, H. Chen et al., J. Mater. Chem., 19, 8112–8118 (2009); DOI: 10.1039/b913423a.