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Product Code M0521A4-100mg
Price £250 ex. VAT

PolyTPD, excellent HTL material for photovoltaics

High quality polymer available with free shipping on qualifying orders

Overview | Specifications | MSDS | Pricing and Options  | Literature and Reviews

Poly(N,N'-bis-4-butylphenyl-N,N'-bisphenyl)benzidine, also known as polyTPD (CAS number 472960-35-3), is an excellent hole transport layer material used in photovoltaics such as perovskite solar cells. It has also proven polyTPD is a promising HTL candidate in multilayer WPLEDs because its HOMO level 5.2 eV is very close to the work function of the indium tin oxide ITO/PEDOT:PSS anode.

Ossila's PolyTPD was used in a high-impact paper (IF 13.281)

PolyTPD from Ossila was used in the high-impact paper (IF 13.281), Self-Powered Low-Cost UVC Sensor Based on Organic-Inorganic Heterojunction for Partial Discharge Detection, T. Park et al., Small, 2100695 (2021); DOI: 10.1002/smll.202100695.

As the highest occupied molecular orbital (HOMO) of polyTPD matches well with the VB of the perovskite, which allows for a good transport of holes towards the polyTPD, it is a popular semiconducting material candidate that is used in the HTL of the perovskite structures. And also as the LUMO of polyTPD is significantly closer to vacuum compared with that of the perovskite CB, polyTPD efficiently blocks the flow of electrons [5].

Like PTAA, polyTPD is one of the family members of poly(triaryl)amines.

General Information

CAS Number 472960-35-3
Chemical Formula (C22H21N)n
Molecular Weight See batch information below
HOMO / LUMO HOMO 5.2 eV LUMO 2.3 eV [1]
Recommended Solvents Toluene, THF, Chloroform, Chlorobenzene




Classification / Family Poly(triarylamines), Organic semiconducting materials, Hole transport layer materials (HTL), Electron block layer material (EBL), Organic Photovoltaics, Polymer Solar Cells, Light-emitting Diodes, Quantun Dot Light-emitting Diodes, OFETs and Perovskite hole transport layer materials

Chemical Structure

Chemical structure of PolyTPD
Chemical structure of PolyTPD

Device Structure(s)

Device Structure ITO/PEDOT:PSS/PVK:polyTPD (1:1 wt%) 50 nm/PFO:MEH-PPV*(95.5:0.5 wt%) 70 nm/Ca/Al [4]
Colour white light emitting device White
Max. Luminance ~ 5,000 cd/m2
Max. Current Efficiency 3.15 cd/A
Device Structure ITO/P(VDF-TrFE-CFE) (1000 nm)/poly-TPD:F4TCNQ (7%, 70 nm)/ PVK:OXD-7:Ir(ppy)3 (150 nm)/TmPyPB(40 nm)/LiF(1 nm)/Al(150 nm) [7]
Colour green light emitting device  Green
Max. Luminance 13,800 cd/m2
Max. Current Efficiency 76.2 cd/A
Max. Power Efficiency 17.1 lm W−1
Device Structure ITO/PEDOT:PSS(30 nm)/poly-TPD(40 nm)/DNA-CTMA*(20 nm)/PFO:MEH-PPV (70 nm)/Cs2CO3(1 – 2 nm)/Al [2]
Colour white light emitting device  White
Max. Luminance 10,500 cd/m2
Max. Current Efficiency 10 cd/A

*For chemical structure informations please refer to the cited references

Device Structure ITO/polyTPD/CH3NH3PbI3/PCBM/C60/BCP/Ag [6] ITO/PEDOT:PSS/CH3NH3PbI3/PCBM/C60/BCP/Ag [6]
JSC (mA cm-2) 22.0 11.3
VOC (V) 1.0 (1.1a) 0.79
FF (%) 69.7 62.7
PCE (best) 15.3 5.58

PolyTPD as a HTL to compare with PEDOT:PSS a) 1.0 V in the supporting information and 1.1 V in the body text of the cited lit. [6]

MSDS Documentation

PolyTPD MSDS SheetPolyTPD MSDS Sheet


Batch Quantity Price
M0521A 100 mg £250
M0521A 250 mg £500
M0521A 500 mg £800
M0521A 1 g £1250

Batch information

Batch Mw Mn PDI Stock info
M521 100 – 150 kDa Discontinued
M522 44,797 25,374 1.77 Discontinued
M523 80,000 22,900 3.5 Discontinued
M524 52,000 20,800 2.5 Discontinued
M0521A1 15,000 6,000 2.5 Discontinued
M0521A2 41 kDa 16.4 kDa 2.5 Discontinued
M0521A3 15,268 8,290 1.84 Discontinued
M0521A4 19,345 7,620 2.54 In stock

Literature and Reviews

  1. Bright, multicoloured light-emitting diodes based on quantum dots, Q. Sun et al., Nat. Photonics, 1, 717 - 722 (2007); doi:10.1038/nphoton.2007.226.
  2. Multilayer white polymer light-emitting diodes with deoxyribonucleic acid-cetyltrimetylammonium complex as a hole-transporting/electronblocking layer, Q. Sun et al., Appl. Phys. Lett., 92, 251108 (2008); doi: 10.1063/1.2948864.
  3. Electro-optics of perovskite solar cells, Q. Lin et al., Nat. Photonics, 9, 106–112 (2015); doi:10.1038/nphoton.2014.284.
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