Organic Light-Emitting Diode with TiOPc Layer–A New Multifunctional Optoelectronic Device

Abstract

An organic light-emitting diode containing titanyl phthalocyanine (TiOPc) and tris-(8-hydroxy quinoline) aluminum (Alq 3 ) layers has been fabricated. The device exhibits green emission from the Alq 3 emissive layer under ambient conditions. Below the turn-on voltage, the green emission is instantaneously switched on by laser irradiation at 650 nm, indicating that the device can be used as a red-to-green light converter. Above the turn-on voltage, the green emission is greatly enhanced by laser irradiation, while the current-voltage characteristics are significantly modified. Amplification factors of the emission intensity as well as the current density upon laser irradiation are found to greatly depend on the TiOPc layer thickness. The TiOPc layer acts as a hole generation layer rather than as a buffer layer.

TPBI:FIrpic organic light emitting devices with the electron transport layer of Bphen/Alq3

“…The electron mobilities of Bphen and Alq 3 are 2 Â 10 À5 cm 2 /Vs and 4 Â 10 À6 cm 2 /Vs at a thin film of about 500 A [9,10], and the LUMO levels of them are 2.9 eV and 3.1 eV [11,12], respectively. If the Bphen is used as an ETL in the proposed structure, the LUMO offset at the interface of EML and ETL is small enough to be negligible.…”

Cathodic-controlled and near-infrared organic upconverter for local blood vessels mapping

“…Based on the high compatibility of the fabrication process in thermal evaporation, the organic upconverter seems to be a promising alternative for traditional upconverters because of the low cost and simplified fabrication process2021. To improve the efficiency of upconverters, taking as reference the tandem device of OLEDs may be an appropriate concept.…”

Organic Light-emitting Devices with Photoresponsive Layer

“…Recently, organic light-emitting devices (OLEDs) with optical response have attracted an interest in application of OLEDs to advanced optoelectronic devices [1][2][3][4][5][6]. We have reported that photoresponsive OLEDs combining OLED with organic photoconductor (OPC) exhibit enhancement of emission by laser irradiation [3][4][5][6].…”

“…We have reported that photoresponsive OLEDs combining OLED with organic photoconductor (OPC) exhibit enhancement of emission by laser irradiation [3][4][5][6]. Schematic structure of the photoresponsive OLED is shown in Figure 1.…”

“…3 ] and Iridium (III) bis(2-(4,6-diflurophenyl)pyridinato-N,C 2 )picolinate [FIrpic] were used as red, green and blue-emitting phosphorescent materials, respectively. The red-emitting device structure was ITO/TiOPc (90nm)/α-NPD (40nm)/CBP+ 4.5wt%…”