Hole transport layer, HTL

The simplest manifestation of an OLED is a sandwich structure consisting of an emission layer (EML) between an anode and a cathode. More typical is an increased complexity OLED structure consisting of an anode, an anode buffer or hole injection layer (HIL), a hole transport layer (HTL), a light-emitting layer, an electron transport layer (ETL), a cathode... 

Holdup, 70 764-765 Hole drilling, via electrochemical machining, 9 598-600 Holes, valence band, 9 728 Hole-transport layer (HTL)... 

A typical vaponr deposited EL device consists of a glass snbstrate coated with a conducting transparent indinm tin oxide electrode, on top of which is a 100-500 A hole transport layer (HTL), followed by a thin (= 100 A) light emitting layer (EML), then a 100-500 A electron transport layer (ETL) and finally a cathode of an alloy such as Mg Ag. This is illustrated in Fignre 3.32. 

FIGURE 5.13. The n-butylsiloxane molecule used to form SAMs of an OLED device that did not require a hole transport layer (HTL). 

Figure 112 Molecular structures (a) of the materials used to manufacture DL LEDs (b) with a molecularly doped hole-transporting-layer (HTL) which serves as an emitter (EML) along with the emitting electron-transporting-layer (ETL).

A thin film ( 100 nm) of a polymer hole-transport layer (HTL) supports a second thin film of a polymer electron-transport layer (ETL) sandwiched between two electrodes supported on a substrate, see Figures 6.2 and 6.3. The anode is transparent in order to allow the passage of the light generated. A potential can be applied between the electrodes. The metal cathode has a low... 

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