TSBPA

CAS Number 205327-13-5

MSDS

TSBPA, HTL material for blue PhOLEDs

High-purity (>99.0%) and available online for priority dispatch

4,4'-(Diphenylsilanediyl)bis(N,N-diphenylaniline) (TSBPA) is diphenylsilyl based with two electron donating triphenylamine units. For its electron rich nature, TSBPA is normally used as a high triplet energy hole transport material for blue phosphorescent organic light-emitting diodes (PHOLEDs).

Also due to its electron donating nature, TSBPA can also be used together with electron accepting materials to form exciplex as emitting layer materials. Green PhOLEDs based on TSBPA:PO-T2T exciplex showed TADF emission with close to the maximum theoretical power efficiency and EQE of 60.9 cd/A, 71 Im/W and 20% respectively.

General Information

CAS number	205327-13-5
Chemical formula	C₄₈H₃₈N₂Si
Molecular weight	670.91 g/mol
Absorption	λ_max 309 nm in DCM
Fluorescence	λ_em 376 nm in DCM
HOMO/LUMO	HOMO = 5.51 eV, LUMO = 2.30 eV, E_T=2.9 eV [1]
Full chemical name	4,4'-(Diphenylsilanediyl)bis(N,N-diphenylaniline)
Synonyms	TSBPA
Classification / Family	Triphenylamine derivatives, Hole transport layer (HTL), Electron blocking layer (EBL), TADF exciplex materials, Phosphorescent organic light-emitting diodes (PHOLEDs), Sublimed materials

Product Details

Purity	Sublimed >99.0% (HPLC)
Melting point	mp = 213 °C, T_g = 84 °C
Appearance	White 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/ NPB (30 nm)/TSBPA (10 nm)/TSBPA:POT2T (20nm)/PO-T2T(50 nm)/LiF(1 nm)/Al (100 nm) [1]
Colour	Green
Max. Luminance	31,000 cd/m²
Max. EQE	20.0%
Max. Current Efficiency	60.9 cd/A
Max. Power Efficiency	71.0 Im/W

Device structure	ITO/NPB (40 nm)/TSBPA (10 nm)/DDMA-TXO2 (I):DPEPO (30 nm)/DPEPO (10 nm)/TPBi (40 nm)/LiF/Al [2]
Colour	Blue
Max. Luminance	4,204 cd/m²
Max. EQE	21.2%
Max. Current Efficiency	36.8 cd/A
Max. Power Efficiency	27.5 Im/W

Device structure	ITO/NPB (40 nm)/TSBPA (10 nm)/DDMA-TXO2 (III):DPEPO (30 nm)/DPEPO (10 nm)/TPBi (40 nm)/LiF/Al [2]
Colour	Blue
Max. Luminance	2,765 cd/m²
Max. EQE	22.6%
Max. Current Efficiency	31.7 cd/A
Max. Power Efficiency	24.3 Im/W

Device structure	ITO/NPB (40 nm)/TSBPA (10 nm)\|TSBPA:PO-T2T 1:1 in 50 vol % UGH-3 (40 nm)\|POT2T (50 nm)\|LiF (1 nm)\|Al (100 nm) [3]
Colour	Green
Max. EQE	19.2 %

Pricing

Grade	Order Code	Quantity	Price
Sublimed(>99.0% purity)	M2311A1	250 mg	£310
Sublimed(>99.0% purity)	M2311A1	500 mg	£480
Sublimed(>99.0% purity)	M2311A1	1 g	£800

MSDS Documentation

TSBPA MSDS TSPBA MSDS sheet

Literature and Reviews

Realizing 20% External Quantum Efficiency in Electroluminescence with Efficient Thermally Activated Delayed Fluorescence from an Exciplex, M. Chapran et al., ACS Appl. Mater. Interfaces, 11 (14), 13460–13471 (2019); DOI: 10.1021/acsami.8b18284.
Molecular Design Strategies for Color Tuning of Blue TADF Emitters, P. Stachelek et al., ACS Appl. Mater. Interfaces, 11, 27125−27133 (2019); DOI: 10.1021/acsami.9b06364.
Less Is More: Dilution Enhances Optical and Electrical Performance of a TADF Exciplex, M. Colella et al., J. Phys. Chem. Lett., 10, 793−798 (2019); DOI: 10.1021/acs.jpclett.8b0364.

Low driving voltage and high power efficiency in blue phosphorescent organic light-emitting diodes using aromatic amine derivatives with diphenylsilyl linkage, C. Lee et al., Synth. Met., 167 (1), 1-4 (2013); DOI: 10.1016/j.synthmet.2013.02.001.
Recent progress on exciplex-emitting OLEDs, H. Kim etal., J. Inf. Disp, 20 (3), 105-121 (2019); DOI: 10.1080/15980316.2019.1650838.