PPO27

CAS Number 1299463-56-1

High Purity Sublimed Materials, Host Materials, Materials, OLED Materials, Semiconducting Molecules, TADF Materials

PPO27, host material for highly efficient TADF devices

High purity (>99% sublimed) PPO27 in quantities from 100 mg to 1 g

PPO27, or 2,7-bis(diphenylphosphoryl)-9-phenyl-9H-carbazole in full name, is a host material developed for highly efficient thermally activated delayed fluorescence (TADF) devices. It has a bipolar structure of electron rich phenylcarbazole core with two electron deficient diphenylphosphine oxide units.

A maximum external quantum efficiency (EQE) of 24.2% was achieved by using PPO27 as the bipolar host and 4CzIPN as the green dopant. This was possible because due to the effective energy transfer from the host to the dopant. The TADF emitter 4CzIPN interacted strongly with the PPO27 host as the latter has strong polarity, and a significant redshift in the electroluminescence spectrum was observed at higher doping concentrations.PPO27 is a typical alcohol soluble bipolar host material which is soluble in isopropyl alcohol (IPA) and possesses a high triplet energy of 2.81 eV for application as a host for sky blue (FIrpic) and deep blue (FCNIrpic) phosphorescent triplet emitters. Smooth surface morphologies with low surface roughness less than 0.30 nm were observed in the PPO27:FIrpic and PPO27:FCNIrpic films spin coated from their IPA solutions.

General Information

CAS number	1299463-56-1
Chemical formula	C₄₂H₃₁NO₂P₂
Molecular weight	643.65 g/mol
Absorption	λ_max 257, 309 nm (in DCM)
Fluorescence	λ_em 386 nm (in DCM)
HOMO/LUMO	HOMO = 6.25 eV, LUMO = 3.0 eV (E_T = 2.81 eV) [1]
Full name	2,7-Bis(diphenylphosphoryl)-9-phenyl-9H-carbazole
Synonyms	PPO27
Classification / Family	Carbazole derivatives, bipolar materials, TADF host materials, phosphorescent host materials, sublimed materials, TADF materials, OLEDs, organic electronics

Product Details

Purity	Sublimed* >99.0%
Melting point	TGA > 350 °C (0.5% weight loss)
Colour	White Powder

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.

Chemical Structure

Device Structure(s)

Device structure	ITO/PEDOT:PSS/TAPC/mCP/2 wt% 4CzIPN:PPO27/TSPO1/LiF/Al [2]
Colour	Green
Max. EQE	24.2%
Max. Power Efficiency	52.0 lm W⁻¹

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>99%)	M2357A1	100 mg	£220
Sublimed (>99%)	M2357A1	250 mg	£440
Sublimed (>99%)	M2357A1	500 mg	£740
Sublimed (>99%)	M2357A1	1 g	£1250

MSDS Documentation

PPO27 MSDS sheet

Literature and Reviews

Correlation of the substitution position of diphenylphosphine oxide on phenylcarbazole and device performances of blue phosphorescent organic light-emitting diodes, H. Son et al., J. Mater. Chem., 2011,21, 5638-5644 (2011); DOI: 10.1039/C0JM03427D.
Phosphine Oxide Type Bipolar Host Material for High Quantum Efficiency in Thermally Activated Delayed Fluorescent Device, B. Kim et al., ACS Appl. Mater. Interfaces, 6 (11), 8396–8400 (2014); DOI: 0.1021/am501301g.
High efficiency in two color and three color phosphorescent white organic light-emitting diodes using a 2,7-substituted 9-phenylcarbazole derivative as the host material, C. Seo et al., Org. Electron., 12 (9), 1459-1464 (2011); DOI: 10.1016/j.orgel.2011.05.026.

Engineering the Substitution Position of Diphenylphosphine Oxide at Carbazole for Thermal Stability and High External Quantum Efficiency Above 30% in Blue Phosphorescent Organic Light-Emitting Diodes, M. Kim et al., Adv. Funct. Mater., 24 (26), 4164-4169 (2014); DOI: 10.1002/adfm.201304072.
High efficiency in solution processed blue phosphorescent organic light-emitting diodes using an alcohol soluble emitting layer, K. Yook et al., Org. Electron., 12 (10), 1595-1599 (2011); DOI: 10.1016/j.orgel.2011.06.018.