. . . "RIV/68378271:_____/09:00324998" . "Pomoc\u00ED experiment\u016F optick\u00E9 excitace - terahertzov\u00E9ho sondov\u00E1n\u00ED byla studov\u00E1na s\u00E9rie tenk\u00FDch vrstev mikrokrystalick\u00E9ho k\u0159em\u00EDku s strukturou m\u011Bn\u00EDc\u00ED se od amorfn\u00ED po zcela mikrokrystalickou. Vzorky byly opticky excitov\u00E1ny na vlnov\u00FDch d\u00E9lk\u00E1ch 800 a 400 nm a jejich odezva byla m\u011B\u0159ena a\u017E do n\u00EDzk\u00FDch teplot (20 K). Vlastnosti nanoskopick\u00E9ho transportu n\u00E1boje se v\u00FDrazn\u011B m\u011Bn\u00ED na sub-pikosekundov\u00E9 \u010Dasov\u00E9 \u0161k\u00E1le. Po\u010D\u00E1te\u010Dn\u00ED fotovodivost vzork\u016F je ur\u010Dena zejm\u00E9na hork\u00FDmi voln\u00FDmi nositeli n\u00E1boje s pohyblivost\u00ED 70 cm2/Vs. Tito nositel\u00E9 jsou rychle (0.6 ps) zachyceny do slab\u011B lokalizovan\u00FDch hoppingov\u00FDch stav\u016F. Hoppingov\u00FD transport pak ur\u010Duje tvar terahertzov\u00FDch spekter na pikosekundov\u00E9 a sub-nanosekundov\u00E9 \u0161k\u00E1le. Saturovan\u00E1 vysokofrekven\u010Dn\u00ED hodnota hoppingov\u00E9 pohyblivosti je ur\u010Dena mikroskopickou neuspo\u0159\u00E1danost\u00ED amorfn\u00EDho vzorku a elektron-fononovou interakc\u00ED v mikrokrystalick\u00FDch vzorc\u00EDch."@cs . . "Kadlec, Filip" . "microcrystalline silicon; amorphous silicon; terahertz; ultrafast; photoconductivity"@en . . "P(IAA100100902), P(LC06040), Z(AV0Z10100520), Z(AV0Z10100521)" . "RIV/68378271:_____/09:00324998!RIV09-AV0-68378271" . . . "Stuchl\u00EDk, Ji\u0159\u00ED" . . "Deyneka, Alexander" . . "Ultrafast carrier dynamics in microcrystalline silicon probed by time-resolved terahertz spectroscopy"@en . "We present the results of optical pump - terahertz probe experiments applied to a set of thin film microcrystalline silicon samples, with structures varying from amorphous to fully microcrystalline. The samples were excited at wavelengths 800 and 400 nm and studied at temperatures down to 20 K. The character of nanoscopic electrical transport properties markedly change on a sub-picosecond time scale. The initial transient photoconductivity of the samples is dominated by hot free carriers with a mobility of 70 cm2/Vs. These carriers are rapidly (within 0.6 ps) trapped into weakly localized hopping states. The hopping process dominates the THz spectra on the picosecond and sub-ns time scales. The saturated high-frequency value of the hopping mobility is limited by the sample disorder in the amorphous sample and by electron-phonon interaction for microcrystalline samples." . "Fekete, Ladislav" . "We present the results of optical pump - terahertz probe experiments applied to a set of thin film microcrystalline silicon samples, with structures varying from amorphous to fully microcrystalline. The samples were excited at wavelengths 800 and 400 nm and studied at temperatures down to 20 K. The character of nanoscopic electrical transport properties markedly change on a sub-picosecond time scale. The initial transient photoconductivity of the samples is dominated by hot free carriers with a mobility of 70 cm2/Vs. These carriers are rapidly (within 0.6 ps) trapped into weakly localized hopping states. The hopping process dominates the THz spectra on the picosecond and sub-ns time scales. The saturated high-frequency value of the hopping mobility is limited by the sample disorder in the amorphous sample and by electron-phonon interaction for microcrystalline samples."@en . "Ultrafast carrier dynamics in microcrystalline silicon probed by time-resolved terahertz spectroscopy"@en . "N\u011Bmec, Hynek" . "Ultrarychl\u00E1 dynamika nositel\u016F n\u00E1boje v mikrokrystalick\u00E9m k\u0159em\u00EDku studovan\u00E1 pomoc\u00ED \u010Dasov\u011B rozli\u0161en\u00E9 terahertzov\u00E9 spektroskopie"@cs . "Fejfar, Anton\u00EDn" . . "Physical Review. B" . "1098-0121" . "7"^^ . . . . "Deyneka, Alexander" . . . . . "[30A3FF79B95E]" . "Ku\u017Eel, Petr" . "7"^^ . . . "000264768900088" . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . . "11" . . . . "Ultrafast carrier dynamics in microcrystalline silicon probed by time-resolved terahertz spectroscopy" . "347472" . . "Ultrarychl\u00E1 dynamika nositel\u016F n\u00E1boje v mikrokrystalick\u00E9m k\u0159em\u00EDku studovan\u00E1 pomoc\u00ED \u010Dasov\u011B rozli\u0161en\u00E9 terahertzov\u00E9 spektroskopie"@cs . "Ultrafast carrier dynamics in microcrystalline silicon probed by time-resolved terahertz spectroscopy" . . "13"^^ . . "79" .