Improved performance of OLEDs with ITO surface treatments

Electrical properties of SAM-modified ITO surface using aromatic small molecules with double bond carboxylic acid groups for OLED applications

“…This difference can cause high turn on voltage, low efficiency and restricts hole-injection [1,2]. Recently in literature, self-assembled monolayers (SAMs) are used to establish a compatible interface between hydrophilic ITO surface and hydrophobic hole transport layer (HTL) surface [3,4]. Important improvements have been achieved increasing the stability and efficiency of OLEDs by using SAM technique by chemical covalent bonding with Si group over alkyl chains to TPD molecules and ITO surface [4].…”

UV-Ozone Generation from Modified High Intensity Discharge Mercury Vapor Lamps for Treatment of Indium Tin Oxide Films

“…The ITO treatment with UV-Ozone affects mainly the hole injection into the emissive polymer, while the luminance of the device is associated to the recombination (hole-electron mutual suppression within the electroluminescent polymer), as mentioned by Iwama et al (2003) and Li et al (2005). They compared the performance of the PLEDs prepared from ITO films with or without UV-Ozone treatment, disclosing a significant improvement on the luminance of the devices after treatment.…”

“…They compared the performance of the PLEDs prepared from ITO films with or without UV-Ozone treatment, disclosing a significant improvement on the luminance of the devices after treatment. Furthermore, the deposition of an additional ETL (electron transport layer) between the emissive layer and the cathode has shown to contribute to the balance of the charge carriers inside the emissive polymer incrementing the electroluminescence (Li et al, 2005). The electroluminescence spectra were collected from the devices polarized at 15 V (Figure 8) and all spectra presented a maximum at 590 nm.…”

Towards anode with low indium content as effective anode in organic solar cells

“…˚I TO is around 4.6 ± 0.2 eV after cleaning of commercial ITO [2][3][4]. This latter can be increased by some treatment such as UV-ozone plasma [5]. Also, the ˚I TO can be higher than the classical value if the ITO layer is used immediately after deposition.…”