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Product Code M2416A1-250mg
Price £190 ex. VAT

Hole Transport Layer Material Triarylamine with a Linear Terphenyl Core

High purity sublimed electron rich semiconducting material in application of p-i-n perovskite solar cells with low non-radiative recombination

N4,N4,N4'',N4''-tetra([1,1'-biphenyl]-4-yl)-[1,1':4',1''-terphenyl]-4,4''-diamine (TaTm), CAS number 952431-34-4, is a triarylamine with a linear terphenyl core and four biphenyl side arms. With high thermal stability and excellent intrinsic hole mobility of 4 × 10-3 cm2 V-1 s-1, TaTm is electron rich and it is normally used as a hole transport layer (HTL) material in organic electronic devices.

High purity TaTm

High purity sublimed material


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Hole-transport layer

Hole-transport layer

(HTL) material (in organic solar cells)

Improving charge seperation 952431-34-4

Improving charge seperation

In vacuum processed p-i-n perovksite solar cells

Together with MoO3, TaTm is widely used in vacuum processed p-i-n perovksite solar cells as hole transport bilayers to improve the charge separation. Annealing the bilayer at high temperature is crucial to obtain high rectification with low non-radiative recombination, owing to the increase of the electrode work function and the formation of an ohmic interface with TaTm.

General Information

CAS number 952431-34-4
Chemical formula C66H48N2
Molecular weight 869.1 g/mol
Absorption* λmax 390 nm
Fluorescence λem (n.a.)
HOMO/LUMO HOMO = 5.40 eV, LUMO = 2.35 eV
Synonyms N4,N4,N4'',N4''-tetra([1,1'-biphenyl]-4-yl)-[1,1':4',1''-terphenyl]-4,4''-diamine
Classification / Family Triarylamine derivatives, Hole transport layer (HTL) materials, Electron blocking layer (EBL), p-i-n Perovksite solar cells ,Sublimed materials.

Product Details

Purity Sublimed* >99.0% (HPLC)
Melting point n.a.
Appearance crystals/powder

* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials for OLED devices.

Chemical Structure

N4,N4,N4'',N4''-tetra([1,1'-biphenyl]-4-yl)-[1,1':4',1''-terphenyl]-4,4''-diamine (TaTm) chemical structure, 952431-34-4


Grade Product Code Quantity Price
Sublimed (>99.0% purity) M2416A1 250 mg £190
Sublimed (>99.0% purity) M2416A1 500 mg £300
Sublimed (>99.0% purity) M2416A1 1 g £480

MSDS Documentation

TaTm - 952431-34-4 - N4,N4,N4'',N4''-tetra([1,1'-biphenyl]-4-yl)-[1,1':4',1''-terphenyl]-4,4''-diamineTaTm MSDS Sheet

Literature and Reviews

  1. Efficient Vacuum Deposited P-I-N Perovskite Solar Cells by Front Contact Optimization, A. Babaei et al., Front. Chem., 7, 936 (2020); DOI: 10.3389/fchem.2019.00936.
  2. Performance enhancement using an embedded nano-pyramid in a perovskite solar cell with TaTm as a hole transport layer, S. Bhattarai et al., New J. Chem., 47, 18332-18340 (2023); DOI: 10.1039/D3NJ03665K.
  3. High voltage vacuum-processed perovskite solar cells with organic semiconducting interlayers, A. Babaei et al., RSC Adv., 10, 6640-6646 (2020); DOI: 10.1039/D0RA00214C.
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