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  • 734594 - N,N′-Di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine

734594 Sigma-Aldrich



Synonym: N,N′-Bis(naphthalen-1-yl)-N,N′-bis(phenyl)benzidine, NPB, NPD

  • CAS Number 123847-85-8

  • Empirical Formula (Hill Notation) C44H32N2

  • Molecular Weight 588.74

  •  MDL number MFCD03093246

  •  PubChem Substance ID 329764912

  •  NACRES NA.23



Related Categories Hole Transport (HT) & Hole Injection Layer (HIL) Materials, Hole Transport Materials, Materials Science, OLED and PLED Materials, Organic and Printed Electronics More...
Quality Level   100
assay   96%
mp   275-280 °C
  279-283 °C (lit.)
Orbital energy   HOMO 5.5 eV 
  LUMO 2.4 eV 
OLED Device Performance   ITO/NPD/TCTA/BCPO:Ir(piq)3 (7-8%)/BCP/Alq3/LiF/Al
• Color: red
• Max. Luminance: 24529 Cd/m2
• Max. EQE: 17 %
• Turn-On Voltage: 2.7 V
  ITO/NPD/TCTA/BCPO:Ir(ppy)3 (7-8%)/BCP/Alq3/LiF/Al
• Color: green
• Max. Luminance: 207839 Cd/m2
• Max. EQE: 21.6 %
• Turn-On Voltage: 2.1 V
  ITO/NPD/mCP/BCPO:FIrpic (8%)/TAZ/LiF/Al
• Color: blue
• Max. Luminance: 35677 Cd/m2
• Max. EQE: 23.5 %
• Turn-On Voltage: 2.8 V
  ITO/PEDOT:PSS/NPD/TCTA/m-CBTZ:Ir(Bt)2(acac) (10%)/TPBI/LiF/Al
• Color: yellow
• Max. Luminance: 106000 Cd/m2
• Max. EQE: 17.5 %
• Turn-On Voltage: 3 V
SMILES string   c1ccc(cc1)N(c2ccc(cc2)-c3ccc(cc3)N(c4ccccc4)c5cccc6ccccc56)c7cccc8ccccc78
InChI   1S/C44H32N2/c1-3-17-37(18-4-1)45(43-23-11-15-35-13-7-9-21-41(35)43)39-29-25-33(26-30-39)34-27-31-40(32-28-34)46(38-19-5-2-6-20-38)44-24-12-16-36-14-8-10-22-42(36)44/h1-32H



5 g in glass bottle


Hole transporting material for OLED devices

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Protocols & Articles


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Organic Optoelectronics on Shape Memory Polymers

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Over recent years, a wide variety of challenges aiming for electrical pumping of organic laser diodes have been addressed. However, organic laser diodes have difficulty gaining widespread application...
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Organic and Hybrid Electronics in Optical Analytical Applications

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