High Efficiency Blue Organic Light Emitting Devices doped by BCzVBi in Hole and Electron Transport Layer

2013 ◽  
Vol 1567 ◽  
Author(s):  
Nam Ho Kim ◽  
You-Hyun Kim ◽  
Ju-An Yoon ◽  
Sang Youn Lee ◽  
Hyeong Hwa Yu ◽  
...  
Keyword(s):  
Electron Transport ◽  
Carrier Transport ◽  
High Efficiency ◽  
Luminous Efficiency ◽  
Organic Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light

ABSTRACTThe electroluminescent characteristics of blue organic light-emitting diodes(BOLEDs) were fabricated with single emitting layer using host-dopant system and doped charge carrier transport layers. The structure of the high efficiency BOLED device was; NPB(600Å)/NPB:BCzVBi-7%(100Å)/ADN:BCzVBi-7%(300Å)/BAlq:BCzVBi-7%(100Å)/BAlq(200Å)/Liq(20Å)/Al(1200Å) to optimize probability of exciton generation by doping BCzVBi in emitting layer and hole/electron transport layers(HTL/ETL) as well. Luminance and luminous efficiency of BOLED doped BCzVBi in EML and HTL/ETL improved from 10090 cd/m2 at 9.5V and 6.44 cd/A at 4.0V to 13190 cd/m2 at 9.5V and 7.64 cd/A at 4.0V about 30% and 18%, respectively, with CIE coordinates of (0.14, 0.17) comparing to BOLED doped BCzVBi in EML only

scholarly journals Enhanced carrier transport in tris(8-hydroxyquinolinate) aluminum by titanyl phthalocyanine doping

RSC Advances ◽  
2014 ◽  
Vol 4 (93) ◽  
pp. 51256-51261 ◽  
Author(s):  
M. Ramar ◽  
Priyanka Tyagi ◽  
C. K. Suman ◽  
Ritu Srivastava
Keyword(s):  
Electron Transport ◽  
Carrier Transport ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Light Emitting ◽  
Organic Light ◽  
Effect Of Doping ◽  
Titanyl Phthalocyanine

The effect of doping titanyl phthalocyanine (TiOPc) into tris(8-hydroxyquinolinate) aluminum (Alq3) (Alq3:T; where T represents TiOPc), used as an electron transport layer (ETL) for organic light emitting diodes (OLEDs), was investigated.

scholarly journals Micromesh-structured flexible polymer white organic light-emitting diodes using single emissive layer of blended polymer and quantum dots

2020 ◽  
Author(s):  
Hsin-Ying Lee
Keyword(s):  
Quantum Dots ◽  
Zinc Oxide ◽  
Electron Transport ◽  
Luminous Efficiency ◽  
Organic Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Light Emitting ◽  
Flexible Polymer ◽  
Organic Light

In this study, poly(N-vinylcarbazole) was blended with CdSe/ZnS core-shell quantum dots of various dimensions to be used as a single emissive layer of flexible polymer white organic light-emitting diodes (WOLEDs). A structure of WOLEDs was deposited on polyethylene terephthalate (PET) substrates. A luminance and maximum luminous efficiency of 4070.2 cd/m2 and 2.84 cd/A were respectively obtained for the WOLEDs prepared using n-type gallium zinc oxide (GZO) and n-type indium gallium zinc oxide (IGZO) films as the electron transport layer and cathode, respectively. Because the current density can be increased by increasing the carrier transport surface area, the 2-μm-periodic SiO2 micromesh was fabricated on PET substrates to enhance the surface area of a MoO3 hole transport layer and a GZO electron transport layer. Furthermore, the GZO electron transport layer could provide a moisture barrier function. Compared with WOLEDs without the SiO2 micromesh, the prepared WOLEDs had an increased current density of 404.5 (compared with 222.8) mA/cm2 when operating at 11 V. Moreover, their associated luminance and maximum luminous efficiency increased to 7016.1 cd/m2 and 3.04 cd/ A, respectively.

Designing an electron-transport layer for highly efficient, reliable, and solution-processed organic light-emitting diodes

2017 ◽  
Vol 5 (12) ◽  
pp. 3097-3106 ◽  
Author(s):  
Jin-Hoon Kim ◽  
Jin-Woo Park
Keyword(s):  
Electron Transport ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Solution Processed ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
Oled Performance

When using PEIE doped with n-type dopants as the ETL, ϕ of the cathode decreased, significantly improving OLED performance.

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