Organic semiconductor pentacene

Fig. 10.24. Current-voltage characteristics from a nanoscale organic transistor formed by contact of a metal coated stamp against a thin film of the organic semiconductor pentacene. The gate voltage varies between +1.0 V and...

This formalism has been continued by Verlaak et al. [15] for the case of several important organic semiconductors (pentacene, tetracene, and perylene) grown on inert substrates. They show that the transition from three- to two-dimensional nucleation is possible when A t (Equation 5.1.3) is greater than a critical value [15] ... 

Sharifzadeh S, Biller A, Kronik L, Neaton JB (2012) Quasiparticle and optical spectroscopy of the organic semiconductors pentacene and PTCDA from first principles. Phys Rev B 85 125307... 

To obtain the thin-film transistor array suitable to softening the panel, flexible 5 inch diagonal liquid crystal displays were also fabricated by lower-temperature vacuum deposition of the organic semiconductor (pentacene). The fabricated panel (QQVGA, 160 X 120 pixels) has confirmed the video display function [12]. 

Hirai (2) prepared an organic semiconductor layer for an organic thin-film transistor consisting of pentacene derivatives, (II), having a thickness of 1 pm. 

There is a very short list of organic semiconductors with reported thin-film field-effect mobilities greater than 1 cm2 V-1 s h These include pentacene, sexithio-phene [5a], and anthradithiophene [17]. If we extend this list to include single crystal and n-type materials, we can add perylene [18], rubrene [19], copper phtha-locyanine (CuPc) [20], tetracyanoquinodimethane (TCNQ) [21], and dithiophene-tetrathiofulvalene (DT-TTF) [22] - still a short list. 

Fig. 2.2. Examples of herringbone and herringbone-like packing motifs for several rigid-backbone, small molecule, organic semiconductors A) pentacene [54a] B) pyrene [54b] C) perylene [54c]...

Fig. 2.4. The often dramatic effects bottom contacts can have on molecular ordering in organic semiconductors like pentacene. A. Schematic diagram of the type of disorder introduced in pentacene s lamellar structure as thin-film growth encounters a step, for example...

An alternative route to solution-processible organic semiconductors is to use precursors to small molecule semiconductors, such as pentacene [59] or tetrabenzo-porphyrin [60], which can be converted into their fully conjugated, insoluble form by thermal or irradiative [61] treatment on the substrate. Pentacene precursors have been shown to yield field-effect mobilities of 0.01-0.1 cm2 V-1 s 1 [62], and 0.1-0.8 cm2 V-1 s 1 [63] after thermal conversion at 150-200 °C. Small molecule organic semiconductors can also be rendered solution processible by attachment of flexible side chains [64-66], Due to the relatively low solubility of these molecules the growth of uniform thin films of these molecules remains challenging, however. 

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