Phosphoric doping

Tanaka, H. et al. 2007. Spin-on n-type silicon films using phosphorous-doped polysilane. Jpn. J. Appl. Phys. 46 L886-L888. 

Emissive dopants, for OLED efficiency characteristics, 12, 141 organometallics emitters, 12, 143 phosphor-doped OLEDs, 12, 142 phosphorescent emitters, 12, 142 Emitters, in OLEDs, 12, 158 Enallenes, in Alder-ene reactions, 10, 591 a,/3-Enals, via propargylic alcohol isomerization, 10, 96 Enamides... 

Phosphors doped with rare-earth elements show two types of CTL spectrum, namely emission from the excited species and recombination radiation, simultaneously. Figure 21 shows the CTL spectrum from the TL-phosphor BaS04 Eu in air containing ethanol vapor. The emission band with fine spectrum components at 420 nm is attributed to the excited HCHO. The line spectrum components peaking at 580 and 615 nm are attributed to the electronic transitions within Eu3+ ions. 

In the absence of phosphorous doping this will not be too important since under the usual conditions of temperature and pressure for deposition the equilibrium (R8) lies well over to the left [38] and the main route for deposition will be via the adsorption and decomposition of SiH4, which we have seen is not transport limited. Thus, layers will be of uniform thickness radially. 

ENDOR (Electron Nuclear Double Resonance) involves the simultaneous application of a microwave and a radio frequency signal to the sample. This is a technique invented by Feher in 1956. The original studies were on phosphorous-doped silicon. A description of the experimental results and apparatus used is presented in two Physical Review articles [24, 25], An excellent treatment of EPR double resonance techniques and theory is given in the book by Kevan and Kispert [26], What follows here is the theory and application of ENDOR used the in analysis of single crystal data with the goal of identifying free radical products in DNA constituents. 

It is well established that the degree of selectivity can vary extremely going from one dielectric to the other [Chow et al.67, Broadbent et al.131, Chow et al.133, Bradbury et al.134, Wilson et al.135]. Silicon nitride, for instance, is notorious for its low selectivity whereas phosphorous doped glasses show an improved selectivity compared with undoped glasses (see also section 3.5). 

WSix has also been used as a direct wiring material between n+-Si and p+-Si. Excellent contact resistances were reported 3xl0 7 Hem2 (n+) 2xl0 7 flcm2 (p+) and lxlO 7 Clem2 for phosphorous doped poly-Si [Mihara et al.215]. 

For LPCVD-poly, phosphorous doping leads to a higher surface roughness and hence decreased fracture strength [28]. 

Confining carriers and triplet excitons in phosphor-doped OLEDs... 

Europium has not many applications. Commercial applications of europium almost always take advantage of the phosphorescence, either in the 2+, or 3+ oxidation state. Industrial application started in the 1960s (Wickersheim and Lefever 1964). Many advances have been made since, leading to the discoveiy of europium activated yttrium oxysulfide (YaOaSiEu " ). This is a red phosphor. Other main industrial phosphors doped with europium are Sr5(P04)3Cl Eu and BaMgAliiOiviEu " for blue, and Y203 Eu " for red. Green phosphors involve terbium (Tb (Caro 1998 Nazarov et al. 2004). The phosphors are for instance used in flat screen monitors and televisions. 

Oxidative Dehydrogenation of Alkanes on Pristine and Phosphorous-Doped CNTs... 

Figure 14.12 Reaction mechanism of butane oxidation on CNT and phosphorous-doped, pre-oxidized CNT. For details, see text. (Reproduced with permission from Ref [46].)...

Silicon carbide was an early approach to the high levels of restenosis caused by BMS. The idea was that interaction between fibrinogen and the stent surface would lead to fibrin deposition, leading to platelet adhesion and thrombus formation thus adding a semiconductor may decrease these electron interactions. [23] Unfortunately the clinical studies of stents coated by amorphous, phosphorous-doped, hydrogen rich silicon carbide showed no difference in restenosis rate when compared to the typical BMS [24]. 

Campbell, L.H., D.L. Smith, S. Tretiak, R.L. Martin, C.J. Neef, and J.R. Ferraris. 2002. Excitation transfer processes in a phosphor-doped poly(p-phenylene vinylene) light-emitting diode. Phys Rev B 65 (8). 

FIGURE 20.4 SEM micrograph of phosphor-doped tungsten bronze particles. 

FIGURE 20.10 Micrograph of phosphor-doped tungsten bronzes. 

In this chapter, a summary of different techniques of spray pyrolysis with its advantages and disadvantages is presented. The process of spray pyrolysis with ultrasonic excitation is treated separately for which, a theoretical model of structuring and substructuring of aerosol particles, Si02, Ti02, carbonate calciumhydroxyapatite, and phosphor-doped wolfram bronze is developed. 

Jokanovic, V., Mioc, U.B., and Nedic, Z.P., Nanostructured phosphorous doped mngsten bronzes obtained by ultrasonic spray pyrolysis, Sol. St. Ionics, submitted for publication. 

---