Effects of Using a Ag Anode with a Co-evaporation Thin Film of MoO_x and α-Naphthyl Diamine Derivative in Organic Light-Emitting Diode

Abstract

We investigated the effects of using a Ag anode with the co-evaporation of molybdenum oxide (MoO x ) and N,N '-bis(1-naphthyl)-N,N '-diphenyl-1,1'-diphenyl-1,4'-diamine (α-NPD). The current density of the device with a Ag anode and a co-evaporation thin film was the highest among the various devices used owing to a low sheet resistance and charge transport. We discussed the mobility and carrier density of the co-evaporation thin film as compared with the electrical properties of the α-NPD thin film. The device with a Ag anode achieved high electroluminescence (EL) efficiency due to the optical design. In particular, the device with a Ag anode and a co-evaporation thin film showed an approximately 55% higher current efficiency than that with indium–tin oxide (ITO) and a MoO x layer.

Electrical conduction behavior of organic light‐emitting diodes using fluorinated self‐assembled monolayer with molybdenum oxide‐doped hole transporting layer

“…If the carrier mobility of the MoOx‐doped α‐NPD thin film is assumed to be 10 −4 m 2 V −1 s −1 , which is the same as the minimum mobility of band conduction, the carrier density must be 1.60 × 10 18 m −3 . This calculation showed that the carrier density of the MoOx‐doped α‐NPD thin film was much lower than that of a conventional organic semiconductor, e.g.…”

“…OLED technologies have undergone continuous development (1)(2)(3)(4). Tang et al reported the first efficient device with organic light-emitting material with a low-voltage below 10 V. This device consisted of a two-layer film of organic materials with a total thickness less than 150 nm (1).…”

Organic-Inorganic Hybrid Perovskite Solar Cells Using Hole Transport Layer Based on α-Naphthyl Diamine Derivative

“…In this work, α-NPD was chosen as the HTL because its HOMO energy level (-5.42 eV) is suitable with that of the perovskite (-5.43 eV) (Figure 1d), it has a simple deposition process, and its hole mobility (1.17 x 10 ) [28], which is comparable to that of Spiro-OMeTAD [24].…”

“…We have previously employed α-NPD as HTL for the fabrication of organic light emitting diode (OLED) [26][27][28] and inspired by the quest to fabricate efficient and low-cost PSCs, we studied the use of α-naphthyl diamine derivative of…”

Effects of Self-Assembled Monolayers with Fluorinated Alkyl Chain

“…copper phthalocyanine (CuPC), copper hexadecauorophthalocyanine (F16CuPC), 4,4 0 ,4 00 -trisfN, (3-methylphenyl)-N-phenylaminog-triphenylamine) (m-MTDATA), poly(ethylene-dioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSS), conducting fluorocarbon coatings (CFx), self-assembled monolayer (SAM), tungsten trioxide(WO 3 ), molybdenum oxide (MoO x ) and Vanadium(V) oxide (V 2 O 5 ) are used as HIL to reduce the interfacial energy barrier between oxide electrode and hole-transport layer [1][2][3][4][5][6][7]. Van Slyke et al reported that highly stable organic light-emitting diodes (OLEDs) based on vapor-deposited Alq thin films had been achieved [1].…”