Study on Work Function of Modified Indium Tin Oxide and Performance of Organic Electroluminescent Devices.

2012 ◽  
Vol 1402 ◽  
Author(s):  
Battulga Munkhbat ◽  
Bolormaa Gendensuren ◽  
Ganbaatar Tumenulzii ◽  
Rentsenmyadag Dashzeveg ◽  
Sarangerel Davaasambuu ◽  
...  

ABSTRACTThe work function of the indium tin oxide electrode (ITO) modified by a self-assembled monolayer (SAM), which is used as an electrode in organic electroluminescent (EL) devices, was investigated in this study. It is revealed that chemical modification of ITO with p-substituted with different terminal groups (NH2−, Cl−, and CF3−) benzoic acids as a SAMs material with carboxyl binding group is caused to increase the work function of the ITO electrode. Through a self-assembly process, the transmittance of the ITO with a SAM was not changed. The work function change of ITO with various SAM was measured by using cyclic voltammetry. Characteristics of EL devices were increased because the energy barrier was decreased in an interface between the ITO and an organic layer in the EL devices. The correlation of the work function change and the performance of the chemically modified EL devices was estimated.


2003 ◽  
Vol 100 (3) ◽  
pp. 275-279 ◽  
Author(s):  
G.Y. Kim ◽  
J.S. Oh ◽  
E.H. Choi ◽  
G.S. Cho ◽  
S.O. Kang ◽  
...  


2011 ◽  
Vol 89 (12) ◽  
pp. 1512-1518 ◽  
Author(s):  
Christophe Blaszykowski ◽  
Larissa-Emilia Cheran ◽  
Michael Thompson

In molecular optoelectronics, high-quality contacts at electrode|organics interfaces are crucial for charge carriers to efficiently flow through and therefore play a critical role on device performance. Electrode surface morphology, adhesibility, wettability, and work function are thus many parameters that must be accurately controlled, which is achievable using self-assembling monolayer (SAM) surface chemistry. Herein, we employ this technique to alter the electronic and surface energy-related properties of indium–tin oxide (ITO). In comparison to unmodified ITO, the newly introduced SAM-derivatized surface exhibits limited wettability and considerably higher work function (ΔΦ = ~1.2 eV). Several applications are proposed for this organic coating, notably at the anode of organic light-emitting diode (OLED) devices for decreasing the hole injection barrier or as an atmospherically stable protective layer in the coatings industry.



2004 ◽  
Vol 85 (9) ◽  
pp. 1616-1618 ◽  
Author(s):  
W. Osikowicz ◽  
X. Crispin ◽  
C. Tengstedt ◽  
L. Lindell ◽  
T. Kugler ◽  
...  






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