SPPO13

CAS Number 1234510-13-4

Host Materials, Materials, OLED Materials, Phosphorescent Host Materials, Semiconducting Molecules, TADF Host Materials, TADF Materials

MSDS

SPPO13, n-type solution-processable ETL material

Universal bipolar co-host for blue, green and red phosphors

SPPO13, 2,7-Bis(diphenylphosphoryl)-9,9'-spirobifluorene, has a structure with an electron donating spirobifluorene core surrounded by two identical electron withdrawing diphenylphosphine oxide groups, while SPPO1 has only one diphenylphosphine oxide group attached to the spirobifluorene.

Due to its electron deficient nature, SPPO13 is used as an n-type solution-processable electron transporting material. SPPO13 could also be used as universal bipolar co-host for blue, green and red phosphors while blending with hole transporting materials such as tris(4-carbazoyl-9-ylphenyl)amine (TCTA).

General Information

CAS number	1234510-13-4
Full name	2,7-Bis(diphenylphosphoryl)-9,9'-spirobifluorene
Chemical formula	C₄₉H₃₄O₂P₂
Molecular weight	716.74 g/mol
Absorption	λ_max 282 nm (in DCM)
Phosphorescene	λ_max 373 nm (in DCM)
HOMO/LUMO	HOMO 5.90 eV, LUMO 2.60 eV [1]
Synonyms	9,9'-spirobi[fluorene]-2,7-diylbis(diphenylphosphine oxide)
Classification / Family	Spirobifluorene derivatives, TADF Light-emitting diodes, Organic electronics, Electron transport Layer (ETL), PHOLEDs cohost materials, Sublimed materials.

Product Details

Purity	>99.0% (HPLC)
Melting point	T_g = 123°C
Appearance	White powder/crystals

Chemical Structure

SPPO13, 2,7-Bis(diphenylphosphoryl)-9,9'-spirobifluorene, 1234510-13-4 — Chemical structure of 2,7-Bis(diphenylphosphoryl)-9,9'-spirobifluorene (SPPO13), CAS# 1234510-13-4.

Device Structure(s)

Device structure	ITO/PEDOT:PSS (40 nm)/PTPATPPO:Ir(2-phq)2acac* (60 nm) (2 wt%)/SPPO13 (70 nm)/Al (100 nm) [2]
Colour	Blue
Max. Power Efficiency	42.7 lm W^-1
Max. EQE	6.1%

Device structure	ITO/PEI:Li2CO3/SPPO13:TCTA:FIrPic/TCTA/MoO3/Al [3]
Colour	Blue
Max. Current Efficiency	34.3 cd/A
Max. Power Efficiency	20.5 lm W^-1
Max. EQE	15.2%

Device structure	ITO/PEI:Li2CO3/SPPO13:TCTA:Ir(mppy)3/TCTA/MoO3/Al [3]
Colour	Green
Max. Current Efficiency	56.9 cd/A
Max. Power Efficiency	35.4 lm W^-1
Max. EQE	16.3%

Device structure	ITO/PEI:Li2CO3/SPPO13:TCTA:Ir(MDQ)2(acac)/TCTA/MoO3/Al [3]
Colour	Red
Max. Current Efficiency	12.0 cd/A
Max. Power Efficiency	7.9 lm W^-1
Max. EQE	10.8%

*For chemical structure information, please refer to the cited references.

Pricing

Grade	Order Code	Quantity	Price
>99.0% purity (HPLC)	M2333A1	250 mg	£400
>99.0% purity (HPLC)	M2333A1	500 mg	£660
>99.0% purity (HPLC)	M2333A1	1 g	£1150

MSDS Documentation

SPPO13 MSDS Sheet

Literature and Reviews

An Amorphous Spirobifluorene-Phosphine-Oxide Compound as the Balanced n-Type Host in Bright and Efficient Light-Emitting Electrochemical Cells with Improved Stability, S. Tang et al., Adv. Optical Mater., 9, 2002105 (2021); DOI: 10.1002/adom.202002105..
A novel blue fluorescent polymer for solution-processed fluorescent–phosphorescent hybrid WOLEDs, J. Wang et al., J. Mater. Chem. C, 3, 2856 (2015); DOI: 10.1039/c4tc02899f.
Solution-processable small molecules as efficient universal bipolar host for blue, green and red phosphorescent inverted OLEDs. J. Chen et al., J. Mater. Chem., 22, 5164-5170 (2012); DOI: 10.1039/C2JM16463A.
High power efficiency in simplified two layer blue phosphorescent organic light-emitting diodes, S. Jang et al., Org. Electronics 11 (6), 1154-1157 (2010); DOI: 10.1016/j.orgel.2010.04.004.
Fabrication and Efficiency Improvement of Soluble Blue Phosphorescent Organic Light-Emitting Diodes Using a Multilayer Structure Based on an Alcohol-Soluble Blue Phosphorescent Emitting Layer, K. Yook et al., Adv. Mater., 22 (40), 4479-4483 (2010); DOI: 10.1002/adma.201002034.
Small Molecule Approach to Passivate Undercoordinated Ions in Perovskite Light Emitting Diodes: Progress and Challenges, J. Lee et al., Adv. Optical Mater., 10 (1), 2101361 (2021); DOI: 10.1002/adom.202101361.