Tuning the singlet–triplet energy gap of AIE luminogens: crystallization-induced room temperature phosphorescence and delay fluorescence, tunable temperature response, highly efficient non-doped organic light-emitting diodes

2015 ◽  
Vol 17 (2) ◽  
pp. 1134-1141 ◽  
Author(s):  
Jie Li ◽  
Yibin Jiang ◽  
Juan Cheng ◽  
Yilin Zhang ◽  
Huimin Su ◽  
...  
Keyword(s):  
Room Temperature ◽  
Light Emitting Diodes ◽  
Energy Gap ◽  
Temperature Response ◽  
Organic Light Emitting Diodes ◽  
Room Temperature Phosphorescence ◽  
Triplet Energy ◽  
Light Emitting ◽  
Organic Light ◽  
Delay Fluorescence

Tuning singlet–triplet energy gap of AIE luminogens: crystallization-induced phosphorescence, delay fluorescence and efficient non-doped OLEDs.

scholarly journals Heavy-Atom-Free Room-Temperature Phosphorescent Organic Light-Emitting Diodes Enabled by Excited States Engineering

2020 ◽  
Author(s):  
Heather Higginbotham ◽  
Masato Okazaki ◽  
Piotr de Silva ◽  
Satoshi Minakata ◽  
Youhei Takeda ◽  
...  
Keyword(s):  
Excited States ◽  
Room Temperature ◽  
Light Emitting Diodes ◽  
Heavy Atom ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Room Temperature Phosphorescence ◽  
Host Matrix ◽  
Light Emitting ◽  
Organic Light

Room temperature phosphorescence materials offer great opportunities for applications in optoelectronics, due to their unique photophysical characteristics. However, purely organic emitters that can realize distinct electrophosphorescence are rarely exploited. Herein a new approach for designing heavy-atom-free organic room temperature phosphorescence emitters for organic light-emitting diodes is presented. The subtle tuning of the energy diagrams of singlet and triplet excited states by appropriate choice of host matrix allows tailored emission properties and switching of emission channels between thermally activated delayed fluorescence and room temperature phosphorescence. Moreover, an efficient and heavy-atom-free room temperature phosphorescence organic light-emitting diodes using the developed emitter is realized.

scholarly journals Heavy-Atom-Free Room-Temperature Phosphorescent Organic Light-Emitting Diodes Enabled by Excited States Engineering

2020 ◽  
Author(s):  
Heather Higginbotham ◽  
Masato Okazaki ◽  
Piotr de Silva ◽  
Satoshi Minakata ◽  
Youhei Takeda ◽  
...  
Keyword(s):  
Excited States ◽  
Room Temperature ◽  
Light Emitting Diodes ◽  
Heavy Atom ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Room Temperature Phosphorescence ◽  
Host Matrix ◽  
Light Emitting ◽  
Organic Light

Room temperature phosphorescence materials offer great opportunities for applications in optoelectronics, due to their unique photophysical characteristics. However, purely organic emitters that can realize distinct electrophosphorescence are rarely exploited. Herein a new approach for designing heavy-atom-free organic room temperature phosphorescence emitters for organic light-emitting diodes is presented. The subtle tuning of the energy diagrams of singlet and triplet excited states by appropriate choice of host matrix allows tailored emission properties and switching of emission channels between thermally activated delayed fluorescence and room temperature phosphorescence. Moreover, an efficient and heavy-atom-free room temperature phosphorescence organic light-emitting diodes using the developed emitter is realized.

Room-temperature phosphorescence of manganese-based metal halides

2021 ◽  
Author(s):  
Yue Zhang ◽  
Dian Chen ◽  
Kai-Hang Jin ◽  
Shuang-Quan Zang ◽  
Qing-Lun Wang
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Metal Halides ◽  
Room Temperature Phosphorescence ◽  
Light Emitting ◽  
High Solid ◽  
Emission Efficiency ◽  
Organic Light

Room-temperature phosphorescence (RTP) materials can be used in anti-counterfeiting, organic light-emitting diodes and displays. However, designing RTP materials with long luminescence lifetime and high solid-state emission efficiency is still a...

Small single–triplet energy gap bipolar host materials for phosphorescent blue and white organic light emitting diodes

2013 ◽  
Vol 1 (33) ◽  
pp. 5008 ◽  
Author(s):  
Young Hoon Son ◽  
Young Jae Kim ◽  
Mi Jin Park ◽  
Hyoung-Yun Oh ◽  
Jung Soo Park ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Energy Gap ◽  
Organic Light Emitting Diodes ◽  
Triplet Energy ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials

scholarly journals High efficiency blue organic light-emitting diodes with below-bandgap electroluminescence

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Maria Vasilopoulou ◽  
Abd. Rashid bin Mohd Yusoff ◽  
Matyas Daboczi ◽  
Julio Conforto ◽  
Anderson Emanuel Ximim Gavim ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
High Mobility ◽  
Organic Light Emitting Diodes ◽  
Triplet Energy ◽  
Material Interface ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Hole Transporting

AbstractBlue organic light-emitting diodes require high triplet interlayer materials, which induce large energetic barriers at the interfaces resulting in high device voltages and reduced efficiencies. Here, we alleviate this issue by designing a low triplet energy hole transporting interlayer with high mobility, combined with an interface exciplex that confines excitons at the emissive layer/electron transporting material interface. As a result, blue thermally activated delay fluorescent organic light-emitting diodes with a below-bandgap turn-on voltage of 2.5 V and an external quantum efficiency (EQE) of 41.2% were successfully fabricated. These devices also showed suppressed efficiency roll-off maintaining an EQE of 34.8% at 1000 cd m−2. Our approach paves the way for further progress through exploring alternative device engineering approaches instead of only focusing on the demanding synthesis of organic compounds with complex structures.

scholarly journals Universal Electroluminescence at Voltages below the Energy Gap in Organic Light‐Emitting Diodes

2021 ◽  
pp. 2101149
Author(s):  
Yungui Li ◽  
Oskar Sachnik ◽  
Bas Zee ◽  
Kalyani Thakur ◽  
Charusheela Ramanan ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Energy Gap ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light
Sign in / Sign up

Export Citation Format

Share Document