Pentacene devices

This chapter will give an overview of methods used to achieve higher mobilities in pentacene devices, will point out potential progress in understanding the nature of exceptional mobility in these devices, and will comment on possible routes to stabilize device performance. 

There have been many reports of elevated mobilities in pentacene TFTs. Table 2.2 summarizes some of these results, some of which have been discussed in the text. New reports appear frequently, continuing to push the limits for high-mobility pentacene devices. 

Pentacene Devices Molecular Structure, Charge Transport and Photo Response... 

Puntambekar and coworkers [124] have also stndied the potential drop between sonrce and drain in TC and BC pentacene devices nsing KFM. In KFM, the snrface potential was measured using a nulling techniqne with the help of a feedback circnit. Since the surface potential contrast strongly depends on the atmospheric conditions — particularly, the presence of an adsorbed water layer on the topmost film — KFM was performed under nitrogen. Figure 4.3.17 shows AFM topographic and surface... 

FIGURE 6.4.8 (See color insert following page 468.) Threshold voltage and mobility uniformity maps for a 1- x 1-cm 200-OTFT array using pentacene devices with a SiOj gate dielectric. 

FIGURE 6.4.14 A portion of an OTFT backplane for a PDLC display using pentacene devices on a PEN substrate. 

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