Implementation of anti-reflection coating to enhance light out-coupling in organic light-emitting devices |
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| Authors: | Kanchan Saxena Dalip Singh Mehta Ritu Srivastava MN Kamalasanan |
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| Institution: | a Polymeric and Soft Materials Section, National Physical Laboratory, Dr. K.S. Krishnan Road, New Delhi 110012, India
b Laser Applications and Holography Laboratory, Instrument Design Development Centre (IDDC), Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India |
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| Abstract: | We report significant enhancement of light out-coupling in organic light-emitting devices (OLEDs) by means of anti-reflection coating of magnesium fluoride (MgF2) on the backside of glass substrate. OLEDs were fabricated by employing the green electrophosphorescent material fac tris-(2-phenylpyridine) iridium Ir(ppy)3] doped in 4,4′,8-N,N-8-dicarbazole-biphenyl (CBP) and 0.4 wt% tetrafluorotetracyano-quinodimethane (F4-TCNQ)-doped naphthylphenylbiphenyl diamine (α-NPD) as hole transport layer (HTL). Single-layer MgF2 with the thickness of λ/4 was then vacuum deposited on the backside of glass substrate of OLED. About two-fold enhancement in luminance with anti-reflection coating of MgF2 has been observed. |
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| Keywords: | Organic light-emitting devices Light out-coupling Anti-reflection coating technique |
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