FP-TRMC

A. Saeki, S. Seki, T. Sunagawa, K. Ushida, S. Tagawa, Charge-carrier dynamics in polythiophene films studied by in situ measurement of flash-photolysis time-resolved microwave conductivity (FP-TRMC) and transient optical spectroscopy (TOS). Philos. Mag. 86, 1261-1276 (2006)... 

Figure 10.16 (A) Condensation Reaction between TAPP and tetraphthaldehyde, TBPP, and THAn produce extended COF-366 and COF-66. (B) Image on the left side is the FP TRMC profile of COF-366 (red) and COF-66 (blue) at 25 °C upon irradiation with 355 nm pulse laser at a power of 1.4x10 and 2.1x10 photons cm, respectively. Another in the right side is the accumulated number of photoinduced carriers upon 355 nm pulse exposure to COF-366 (red) and COF-66 (blue) sandwiched by ITO and A1 electrodes. Excitation was carried out at the photo density of 9. ...

B) (a) FP-TRMC profile of the 2D D-A COF in Ai (black) and SF6 atmospheres (blue), (b) Accumulated number of photo-induced charge carriers in the 2D D-A COF upon 355 nm pulse exposure, (c) I-V curve of the 2D D-A COF in the dark (black) and upon irradiation (red) with visible light from a Xenon light source, (d) Photocurrents of the 2D D-A COF (red curve), COF-5 (black), and a simple mixture of D and A at a molar ratio of 3 2 (blue) upon repeated switching of the light on and off. 

BET = Brunauer-Emmett-Teller CMON = covalent metal-organic networks CTF = covalent triazine-based framework DCQNI = A,A -dicyanoquinodiimine DEF = A,A-diethylformamide DMA = A,A-dimethyl-acetamide FP-TRMC = flash-photolysis time-resolved microwave conductivity HHT = 2,3,6,7,10,11-hexa-hydroxytriphenylene M-CAT = metal-catecholate PSM = postsynthesis modifications PXRD = powder X-ray diffraction TCNQ = tetracyanoquinodimethane TOF = time-of-flight TTF = tetrathiafulvalene. 

CP-MAS cross polarization magic angle spinning FP-TRMC... 

Besides doping, the hetero-junction formed by semiconductors of different nature can enhance charge transfer. Savenije and his coworkers using the flash-photolysis time-resolved microwave conductivity technique (FP-TRMC) studied... 

The electrical conductivity of the i-stacked polymer was investigated by the flash-photolysis time-resolved microwave conductivity (FP-TRMC) method [57-68]. We could observe the charge mobility in 22e through the stacked r-electron systems in a single polymer chain using this noncontact measurement technique [30], Polymer 22e was dispersed in a polystyrene film without any dopants, and the cast film on quartz was excited by a laser pulse at 355 nm. The kinetic traces of microwave... 

A laser pulse can be used instead of the van der Graff generator to produce the electron-hole pair, which is a technique known as flash photolysis, time-resolved, microwave conductivity or FP-TRMC. The main disadvantage is that the concentration of electron-hole pairs formed in this way is more difficult to estimate. Usually, it can only be used to measure the product of the quantum yield and the sum of the mobilities (oriented films [15,16]. More recently a variation on this method has been introduced in which the transient absorption spectrum is measured simultaneously. This provides structural information on the charge carriers and (provided assumptions are made) allows their concentration to be determined yielding Sp, [17,18]. 

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