Optimizing the Charge Balance of Fluorescent Organic Light-Emitting Devices to Achieve High External Quantum Efficiency Beyond the Conventional Upper Limit

2012 ◽  
Vol 24 (13) ◽  
pp. 1765-1770 ◽  
Author(s):  
Yong-Jin Pu ◽  
Go Nakata ◽  
Fumiya Satoh ◽  
Hisahiro Sasabe ◽  
Daisuke Yokoyama ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Charge Balance ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Upper Limit ◽  
Organic Light ◽  
Organic Light Emitting Devices

scholarly journals Novel blue fluorescent emitters structured by linking triphenylamine and anthracene derivatives for organic light-emitting devices with EQE exceeding 5%

2019 ◽  
Vol 7 (35) ◽  
pp. 10810-10817 ◽  
Author(s):  
Jing Zhang ◽  
Yaping Zhao ◽  
Huixia Xu ◽  
Di Zhang ◽  
Yanqin Miao ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Anthracene Derivatives ◽  
Organic Light Emitting Devices

Two novel bipolar compounds of TPA-AN-NA and TPA-AN-TFP were designed by linking triphenylamine and anthracene derivatives. The TPA-AN-NA-based blue device achieves a high external quantum efficiency of 5.44% and a radiative exciton yield of 56.68%.

Influence of Device Configuration on External Quantum Efficiency in Organic Light-Emitting Devices

2000 ◽  
Vol 660 ◽  
Author(s):  
Masayuki Yahiro ◽  
Tetsuo Tsutsui
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Emission Spectra ◽  
Metal Electrode ◽  
Integrating Sphere ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Emissive Region ◽  
Organic Light Emitting Devices

ABSTRACTThe external quantum efficiency in conventional double-layer type organic light-emitting devices with different layer thickness was carefully evaluated. From the measurements of luminance and emission spectra, external quantum efficiency (uncorrected) was obtained.The correction due to the modification of spatial emission distribution was added from the measurements of spatial emission patterns. The external quantum efficiency, both uncorrected and corrected, showed strong dependency on the distance between a metal electrode and an emissive region. This variation was ascribed to the change of coupling-out efficiency. Independent experimental evaluations of apparent couple-out efficiency using an integrating sphere supported this interpretation.

High-external-quantum-efficiency organic light-emitting devices

1997 ◽  
Vol 22 (6) ◽  
pp. 396 ◽  
Author(s):  
G. Gu ◽  
D. Z. Garbuzov ◽  
P. E. Burrows ◽  
S. Venkatesh ◽  
S. R. Forrest ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Highly efficient, deep-red organic light-emitting devices using energy transfer from exciplexes

2017 ◽  
Vol 5 (3) ◽  
pp. 527-530 ◽  
Author(s):  
Yuji Nagai ◽  
Hisahiro Sasabe ◽  
Jun Takahashi ◽  
Natsuki Onuma ◽  
Takashi Ito ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Emission Wavelength ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Highly Efficient ◽  
Organic Light ◽  
Organic Light Emitting Devices ◽  
Electroluminescence Emission

Record-breaking highly efficient, deep-red phosphorescent OLEDs are developed. The optimized device exhibits an external quantum efficiency of nearly 18% and an electroluminescence emission wavelength of 670 nm.

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