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Merck
CN

806781

TPBi

Synonym(s):

2,2′,2"-(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole)

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About This Item

Empirical Formula (Hill Notation):
C45H30N6
CAS Number:
192198-85-9
Molecular Weight:
654.76
NACRES:
NA.23
PubChem Substance ID:
329769027
UNSPSC Code:
12352103
MDL number:
MFCD08276433

Key Documents

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InChI

1S/C45H30N6/c1-4-16-34(17-5-1)49-40-25-13-10-22-37(40)46-43(49)31-28-32(44-47-38-23-11-14-26-41(38)50(44)35-18-6-2-7-19-35)30-33(29-31)45-48-39-24-12-15-27-42(39)51(45)36-20-8-3-9-21-36/h1-30H

SMILES string

C1(C2=NC(C=CC=C3)=C3N2C4=CC=CC=C4)=CC(C5=NC(C=CC=C6)=C6N5C7=CC=CC=C7)=CC(C8=NC(C=CC=C9)=C9N8C%10=CC=CC=C%10)=C1

InChI key

GEQBRULPNIVQPP-UHFFFAOYSA-N

description

Electron Transport Layer

assay

≥99.5% (HPLC)

form

powder

mp

272-277 °C

orbital energy

HOMO 6.2 eV 
LUMO 2.7 eV 

OLED device performance

ITO/MoO3/NPB/Cz-BTPE/TPBi/LiF/Al (ref 2)

  • Color: blue
  • Max. Luminance: 9911 Cd/m2
  • Max. EQE: 1.9 %
  • Turn-On Voltage: 4.9 V

ITO/MoO3/NPB/Ph-BTPE/TPBi/LiF/Al
  • Color: blue
  • Max. Luminance: 6497 Cd/m2
  • Max. EQE: 1.9 %
  • Turn-On Voltage: 5.3 V

ITO/MoO3/NPB/isopro-BTPE/TPBi/LiF/Al(ref 2)
  • Color: blue
  • Max. Luminance: 1127 Cd/m2
  • Max. EQE: 1.7 %
  • Turn-On Voltage: 5.3 V

ITO/MoO3/NPB/methyl-BTPE/TPBi/LiF/Al (ref 2)
  • Color: blue
  • Max. Luminance: 1976 Cd/m2
  • Max. EQE: 1.3 %
  • Turn-On Voltage: 5.3 V

Quality Level

100

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Application

TPBi can be used to fabricate an electron transport layer for organic-inorganic hybrid perovskite LEDs.

General description

TPBi is an organic semiconductor that displays high electron mobility (3.3×10−5 cm2 V−1 s−1) and high glass transition temperature. It is widely used as an electron transport layer(ETL) in QLEDs and OLEDs, which is a cathode buffer layer in organic solar cells.

The increase in power conversion efficiency of the device on the addition of TBPi is attributed to the following reasons:
  • Preventing exciton from quenching at the acceptor/cathode interface.
  • Acting as an optical spacer.
  • Forming a passivating layer.

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
MKCZ6260
MKCX8527
MKCV8492
MKCV1234
MKCT5294

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Study on Electron Transport Characterization in TPBi Thin Films and OLED Application
Yanping Wang, et al.
The Journal of Physical Chemistry C, 125, 16753-16758 (2021)
Efficient blue organic light-emitting diodes employing thermally activated delayed fluorescence
Qisheng Z, et al.
Nature Photonics, 8, 326-332 (2014)
Semi-transparent organic-inorganic hybrid perovskite light-emitting diodes fabricated under high relative humidity
Taejun Kim, et al.
Solid-state electronics, 165, 107749-107749 (2020)
Employing ~100% Excitons in OLEDs by Utilizing a Fluorescent Molecule with Hybridized Local and Charge-Transfer Excited State
Weijun L, et al.
Advances in Functional Materials, 24, 1609-1614 (2014)
High-efficiency deep-blue organic light-emitting diodes based on a thermally activated delayed fluorescence emitter
Shuanghong W, et al.
Journal of Material Chemistry C, 2, 421-424 (2014)
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