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OLED Materials Technology and Products

~ High efficiency,high brightness orange-yellow phosphorescent emitter ~

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Contact information MCL's proprietary orange emitter material for OLED white lighting

 Formula  C31H23IrN2O2S2
 Molecular Weight  712.08 g/mole
 Thermal Gravimetric Analysis  395℃
 Absorption  444nm(in CH2CI2)
 Photoluminescence  555nm(in CH2CI2)
Inset 1. The structure of MCL's orange-yellow emitter material PO-01 and its properties
  With more than 10 years experience, MCL has developed an orange-yellow phosphorescent emitter material with very high efficiency and high brightness. As disclosed in two patents, TW patent(I242999) and US patent(7445857), the PO-01 is an organic Iridium complex compound material, (Iridium(III)bis(4-phenylthieno[3,2-c]pyridinato-N,C2’) acetylacetonate) with a formula of C31H23IrN2O2S2.  This high efficiency yellow phosphorescent was designed as a dopant material for a hole-transport host, e.g. CBP (4,4’-bis(N-carbazolyl)-1,1’-biphenyl).
Driving Voltage (V)
Current Efficiency (Cd/A)
Power Efficacy (lm/W)
CIE (x, y)
(0.50, 0.50)
λ (nm)
Inset 2. The summary of the device performance by using MCL’s emitter material PO-01

  The PO-01 has been studied in a device with following configuration by using conventional hole transport, electron transport, host and blocking materials: NPB(40nm)/PO-01(8%):CBP(30nm)/BCP(10nm)/Alq3(20nm)/ LiF(0.5nm)/Al(100nm).    The device performance was summarized in Inset 2, which is comparable to a world leading commercial yellow dopant of a 62.0 cd/A current efficiency.    In addition to superior current efficiency and power efficacy of 64.8 Cd/A and 55.8 lm/W, respectively, PO-01 is also endowed with a high thermal stability of Td = 395℃.    The data shown in following figures demonstrate PO-01 as an excellent emitter material characterized with high brightness and current efficiency, high color stability, and external quantum efficiency from 12.6% - 16.7%.    Based on this material, because of its lower driving voltage, a device with a low power consumption feature can be easily engineered.


  Among other OLED materials under development, a device scheme with LiF/Al/ETL/HBL/Materix:PO-01/EBL/HTL/ITO layout, even better performance data was observed with CE=76.7 cd/A, PE=84.4 lm/W, EQE=19.3%.    MCL is keen to collaborate with organizations developing device applications based on our PO-01 emitter material.   If you’re interested in our product, please send us your contact information and we will be happy to discuss with you about our offers.

Contact information Key Technologies, Facility and Services

OLED, electroluminescence material, EL, yellow-orange emitter material, dopant, high brightness, high efficiency, high power efficiency

Contact information Contact information

Contact us: Ms. Maria Wu / Manager   Tel: +886-3-5916827   Email: