NTCDA

TCNQ icliucyanorjuinodimcihuiic TDAE iclrukis dimclhylaminoclhanc NTCDA naphlhalenc letracarboxylic dianhydridc PTCDA pciylenc lelracarbuxylic dianhydridc... 

Figure 14-20. Molecular structure of naphthalene tctracarboxylic dianliydridc (NTCDA) and perylene letracarboxylic dianhydridc (PTCDA).

Nollau A, Pfeiffer M, Fritz T, Leo K (2000) Controlled n-type doping of a molecular organic semiconductor naphthalenetetracarboxylic dianhydride (NTCDA) doped with bis (ethylenedithio)-tetrathiafulvalene (BEDT-TTF). J Appl Phys 87 4340... 

L. Sabbatini, and P. G. Zambonin, NTCDA organic thin-film transistor as humidity sensor weaknesses and strengths , Sensors And Actuators B -Chemical 77, 7 (2001). 

NTCDA naphthalene tetracarboxylic dianhydride PTCDA perylene tetracarboxylic dianhydride... 

Another interesting feature in the data given in Table 14-3 is the different mobility reported for NTCDA (naphthalene tetracarboxylic dianhydride) and PTCDA (perylene tetracarboxylic dianhydride). These two compounds present very similar molecular formulae (Fig. 14-20), but differ by their crystal packing... 

FlG. 10.1. Dispersion relation for an organic microcavity with a 20 nm thick NTCDA active layer. The broken curves are the uncoupled cavity photon (P) and Frenkel exciton (X) dispersion relations as determined by the fitting parameters. Inset room temperature photoluminescence and absorbance spectra for a 50 nm thick film of NTCDA. Absorption peaks at 3.19 and 3.39 eV are designated as the 0-0 and 0-1 transitions. Reprinted with permission from Holmes et al. (12). Copyright 2004, American Physical Society. 

Tetracyanoquinodomethane (48a) and ll,ir,12,12 -tetracyanonaptho-2,6,quin-odimethane (TCNQ, 48b) are commercially available and n-channel behavior has been observed for both compounds (Figure 3.1.20).[281] Devices fabricated using 48b display a higher mobility (10 cm V s ) than 48a (10 cm V s ), and have better air-stability than NTCDA, although both 48a and 48b have low on/off ratios due to unintentional doping. 

Soluble derivatives of fused aromatic systems are not limited to p-channel materials however, they are far fewer in number. A soluble derivative of NTCDA has recently been developed that can be cast from a,a,a-trifluorotoluene (Figure 5.3.lid) [66]. Devices prepared from this derivative showed electron mobilities of 0.01 cmWs [67]. This is currently the only nonfullerene solution-cast n-channel material. 

Figure 5. DSC thermograms of the reactive MLE precursors (1) NTCDA+DAH and (2) NTCDA+DAM.

Thesulphonatedpolyimidemembranesarebasedon4,4 -diaminobiphenyl-2,2 -disulphonic acid (BDSA), 4,4 -oxydianiline (ODA), 4,4 -oxydiphthalic anhydride (ODPA) and 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA). The study of the surface properties of fluorinated polyimides exposed to vacuum ultraviolet (VUV) radiation and atomic oxygen may help us understand the stability of these polymers. It will also be interesting to apply this sulphonation method to some novel high molar mass poly-etherimide, as reported by Hsio and Yang (1997). 

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