Ultra high-efficiency multi-photon emission blue phosphorescent OLEDs with external quantum efficiency exceeding 40%

2012 ◽  
Vol 13 (11) ◽  
pp. 2615-2619 ◽  
Author(s):  
Hisahiro Sasabe ◽  
Kazuhiro Minamoto ◽  
Yong-Jin Pu ◽  
Masakatsu Hirasawa ◽  
Junji Kido
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Photon Emission ◽  
Blue Phosphorescent

Extremely high-efficiency multiphoton emission blue phosphorescent OLEDs with external quantum efficiency exceeding 40%

2012 ◽  
Author(s):  
Hisahiro Sasabe ◽  
Kazuhiro Minamoto ◽  
Yong-Jin Pu ◽  
Masakatsu Hirasawa ◽  
Junji Kido
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Blue Phosphorescent

scholarly journals Record High External Quantum Efficiency of 19.2% Achieved in Light-Emitting Diodes of Colloidal Quantum Wells Enabled by Hot-Injection Shell Growth

2019 ◽  
Author(s):  
Baiquan Liu ◽  
Yemliha Altintas ◽  
Lin Wang ◽  
Sushant Shendre ◽  
Manoj Sharma ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Performance ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Shell Growth ◽  
Light Emitting ◽  
Hot Injection ◽  
Key Factor

<p> Colloidal quantum wells (CQWs) are regarded as a new, highly promising class of optoelectronic materials thanks to their unique excitonic characteristics of high extinction coefficient and ultranarrow emission bandwidth. Although the exploration of CQWs in light-emitting diodes (LEDs) is impressive, the performance of CQW-LEDs lags far behind compared with other types of LEDs (e.g., organic LEDs, colloidal quantum-dot LEDs, and perovskite LEDs). Herein, for the first time, the authors show high-efficiency CQW-LEDs reaching close to the theoretical limit. A key factor for this high performance is the exploitation of hot-injection shell (HIS) growth of CQWs, which enables a near-unity photoluminescence quantum yield (PLQY), reduces nonradiative channels, ensures smooth films and enhances the stability. Remarkably, the PLQY remains 95% in solution and 87% in film despite rigorous cleaning. Through systematically understanding their shape-, composition- and device- engineering, the CQW-LEDs using CdSe/Cd<sub>0.25</sub>Zn<sub>0.75</sub>S core/HIS CQWs exhibit a maximum external quantum efficiency of 19.2%. Additionally, a high luminance of 23,490 cd m<sup>-2</sup>, extremely saturated red color with the Commission Internationale de L’Eclairage coordinates of (0.715, 0.283) and stable emission are obtained. The findings indicate that HIS grown CQWs enable high-performance solution-processed LEDs, which may pave the path for CQW-based display and lighting technologies.</p>

High-efficiency, deep blue ZnCdS/CdxZn1−xS/ZnS quantum-dot-light-emitting devices with an EQE exceeding 18%

Nanoscale ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 5650-5657 ◽  
Author(s):  
Ouyang Wang ◽  
Lei Wang ◽  
Zhaohan Li ◽  
Qiulei Xu ◽  
Qingli Lin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Deep Blue

18% peak external quantum efficiency (EQE) for deep blue QLEDs by using ZnCdS/CdxZn1−xS/ZnS quantum dots.

Blue Phosphorescent Ir(III) Complexes Achieved with Over 30% External Quantum Efficiency

2019 ◽  
Vol 7 (24) ◽  
pp. 1901387 ◽  
Author(s):  
Rena Zaen ◽  
Ki‐Min Park ◽  
Kyung Hyung Lee ◽  
Jun Yeob Lee ◽  
Youngjin Kang
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Blue Phosphorescent

Dopant preferential site occupation and high efficiency white emission in K2BaCa(PO4)2:Eu2+,Mn2+ phosphors for high quality white LED applications

2019 ◽  
Vol 6 (5) ◽  
pp. 1289-1298 ◽  
Author(s):  
Xinguo Zhang ◽  
Zhenpeng Zhu ◽  
Ziying Guo ◽  
Zishan Sun ◽  
Zichao Yang ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
White Led ◽  
High Quality ◽  
White Emission ◽  
Site Occupation ◽  
Preferential Site ◽  
Color Tunable

Novel color-tunable and white-emitting K2BaCa(PO4)2:Eu2+,Mn2+ phosphors with external quantum efficiency of 70% were developed for NUV LED.

9,9-Diphenyl-thioxanthene derivatives as host materials for highly efficient blue phosphorescent organic light-emitting diodes

2015 ◽  
Vol 3 (38) ◽  
pp. 9999-10006 ◽  
Author(s):  
Kunkun Liu ◽  
Xiang-Long Li ◽  
Ming Liu ◽  
Dongcheng Chen ◽  
Xinyi Cai ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Maximum Power ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Blue Phosphorescent

A series of 9,9-diphenyl-9H-thioxanthene derivatives are reported as host materials in blue phosphorescent OLEDs, giving a maximum power efficiency of 69.7 lm W−1 and an external quantum efficiency of 29.0%.

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