BTB

CAS Number 266349-83-1

Electron / Hole Transport Layer Materials, High Purity Sublimed Materials, Host Materials, Semiconducting Molecules, TADF Materials

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.