2001
DOI: 10.1063/1.1388875
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White light emission from blends of blue-emitting organic molecules: A general route to the white organic light-emitting diode?

Abstract: Bright and efficient exciplex emission from light-emitting diodes based on hole-transporting amine derivatives and electron-transporting polyfluorenes

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Cited by 182 publications
(88 citation statements)
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“…As a consequence, the 2.4 eV energy gap, between the HOMO of N-BDAVBi and the LUMO of BPhen, matches the green emission band and exciplexes form. Unfortunately, these exciplexes usually reduce the efficiency, 17,18 accounting for the decreased efficiency with increasing thickness of the MTL. When the thickness of the MTL is greater than 6 nm, the maximum efficiencies are almost the same.…”
Section: Performance Enhancement Of White-electrophosphorescent Devicmentioning
confidence: 99%
“…As a consequence, the 2.4 eV energy gap, between the HOMO of N-BDAVBi and the LUMO of BPhen, matches the green emission band and exciplexes form. Unfortunately, these exciplexes usually reduce the efficiency, 17,18 accounting for the decreased efficiency with increasing thickness of the MTL. When the thickness of the MTL is greater than 6 nm, the maximum efficiencies are almost the same.…”
Section: Performance Enhancement Of White-electrophosphorescent Devicmentioning
confidence: 99%
“…For device D2, the EL spectrum exhibits only wide band with a maximum at 553 nm, which may be attributed to exciplex formation between PTA and Zn(PSA-BTZ)2. Exciplex can be formed between the ground state of a donor molecule and the excited state of an acceptor molecule [12]. In our case, the donor molecule is presented by NPD or PTA, and the acceptor molecule by Zn(PSA-BTZ)2 complex.…”
Section: El Spectra Of Oleds Based On Sulphanilamino-substituted Zincmentioning
confidence: 99%
“…So, for pure monochromatic OLEDs, exciplexes should be avoided [25][26][27]. On the other hand, exciplexes were proposed to tune the OLED emission color [28][29][30] and to design white OLEDs [12,18,[31][32][33][34][35]. The use of exciplex emission simplifies the structure of white OLEDs.…”
Section: Introductionmentioning
confidence: 99%
“…OLEDs are also different from LEDs in that white light could come from a single source by blending of different compounds. White light has been proposed for OLEDs by blending blue emitting polymer blends [24] and demonstrated by blending a blue and orange emitting polymer blend [25]. Blue continues to be the most difficult portion of the spectrum for which to find efficient systems and is critical to the development of white light sources.…”
Section: Technical Barriers To Oleds As a General Illuminationmentioning
confidence: 99%