東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Linked to FindBook

Google Book

Amazon

博客來

Charge Carrier Dynamics in Transition Metal Oxides Studied by Femtosecond Transient Extreme Ultraviolet Absorption Spectroscopy.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Charge Carrier Dynamics in Transition Metal Oxides Studied by Femtosecond Transient Extreme Ultraviolet Absorption Spectroscopy./
Author:	Jiang, Chang-Ming.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2015,
Description:	176 p.
Notes:	Source: Dissertations Abstracts International, Volume: 77-05, Section: B.
Contained By:	Dissertations Abstracts International77-05B.
Subject:	Physical chemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3733364
ISBN:	9781339216393

Charge Carrier Dynamics in Transition Metal Oxides Studied by Femtosecond Transient Extreme Ultraviolet Absorption Spectroscopy.
Jiang, Chang-Ming.

Charge Carrier Dynamics in Transition Metal Oxides Studied by Femtosecond Transient Extreme Ultraviolet Absorption Spectroscopy. - Ann Arbor : ProQuest Dissertations & Theses, 2015 - 176 p.

Source: Dissertations Abstracts International, Volume: 77-05, Section: B.

Thesis (Ph.D.)--University of California, Berkeley, 2015.

This item must not be sold to any third party vendors.

With the ability to disentangle electronic transitions that occur on different elements and local electronic structures, time-resolved extreme ultraviolet (XUV) spectroscopy has emerged as a powerful tool for studying ultrafast dynamics in condensed phase systems. In this dissertation, a visible-pump/XUV-probe transient absorption apparatus with femtosecond resolution was constructed to investigate the carrier relaxation dynamics in semiconductors after photo-excitation. This includes timescales for carrier thermalization by carrier-carrier and carrier-phonon scattering. The 30 - 72 eV photon energy coverage (17 - 40 nm wavelength) generated by a table-top XUV light source is suitable for probing the 3p-to-3d core level absorptions of various transition metal oxides (TMOs) with specificities to elements and oxidation states. In Chapter 1, a brief introduction to charge carrier dynamics in semiconductor-based materials is given. In addition, fundamentals of core-level spectroscopy and the high harmonic generation (HHG) process are also addressed in this introductory chapter. Specifications of the experimental apparatus that was constructed are summarized in Chapter 2, including the design concepts and characterization of performance. Chapter 3 presents the spectral tunability of the XUV pulses generated from a semi-infinite gas cell (SIGC), as well as the data acquisition procedures. Charge carrier relaxation dynamics in Co3O4 following the charge transfer excitation pathway at 400 nm are documented in Chapter 4. In Chapter 5, various visible pump wavelengths are used to excite Co3O4 and the differences in the carrier dynamics versus excitation wavelength are considered. After selectively photoexciting a Si/TiO2 heterojunction, the resulted electron transfer process is observed and reported in Chapter 6. The concluding remarks of the dissertation are made in Chapter 7, while several ongoing time-resolved experiments are addressed in the Appendix sections.

ISBN: 9781339216393Subjects--Topical Terms:

1981412
Physical chemistry.
Subjects--Index Terms:

Carrier relaxation

Charge Carrier Dynamics in Transition Metal Oxides Studied by Femtosecond Transient Extreme Ultraviolet Absorption Spectroscopy.
LDR:03313nmm a2200385 4500 001 2349459
005 20220920134320.5
008 241004s2015 ||||||||||||||||| ||eng d
020 $a 9781339216393
035 $a (MiAaPQ)AAI3733364
035 $a (MiAaPQ)berkeley:15473
035 $a AAI3733364
040 $a MiAaPQ $c MiAaPQ
100 1 $a Jiang, Chang-Ming. $3 3688872
245 1 0 $a Charge Carrier Dynamics in Transition Metal Oxides Studied by Femtosecond Transient Extreme Ultraviolet Absorption Spectroscopy.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2015
300 $a 176 p.
500 $a Source: Dissertations Abstracts International, Volume: 77-05, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Leone, Stephen R.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2015.
506 $a This item must not be sold to any third party vendors.
520 $a With the ability to disentangle electronic transitions that occur on different elements and local electronic structures, time-resolved extreme ultraviolet (XUV) spectroscopy has emerged as a powerful tool for studying ultrafast dynamics in condensed phase systems. In this dissertation, a visible-pump/XUV-probe transient absorption apparatus with femtosecond resolution was constructed to investigate the carrier relaxation dynamics in semiconductors after photo-excitation. This includes timescales for carrier thermalization by carrier-carrier and carrier-phonon scattering. The 30 - 72 eV photon energy coverage (17 - 40 nm wavelength) generated by a table-top XUV light source is suitable for probing the 3p-to-3d core level absorptions of various transition metal oxides (TMOs) with specificities to elements and oxidation states. In Chapter 1, a brief introduction to charge carrier dynamics in semiconductor-based materials is given. In addition, fundamentals of core-level spectroscopy and the high harmonic generation (HHG) process are also addressed in this introductory chapter. Specifications of the experimental apparatus that was constructed are summarized in Chapter 2, including the design concepts and characterization of performance. Chapter 3 presents the spectral tunability of the XUV pulses generated from a semi-infinite gas cell (SIGC), as well as the data acquisition procedures. Charge carrier relaxation dynamics in Co3O4 following the charge transfer excitation pathway at 400 nm are documented in Chapter 4. In Chapter 5, various visible pump wavelengths are used to excite Co3O4 and the differences in the carrier dynamics versus excitation wavelength are considered. After selectively photoexciting a Si/TiO2 heterojunction, the resulted electron transfer process is observed and reported in Chapter 6. The concluding remarks of the dissertation are made in Chapter 7, while several ongoing time-resolved experiments are addressed in the Appendix sections.
590 $a School code: 0028.
650 4 $a Physical chemistry. $3 1981412
650 4 $a Materials science. $3 543314
653 $a Carrier relaxation
653 $a Extreme ultraviolet
653 $a High harmonic generation
653 $a Transient absorption
653 $a Transition metal oxides
690 $a 0494
690 $a 0794
710 2 $a University of California, Berkeley. $b Chemistry. $3 1674000
773 0 $t Dissertations Abstracts International $g 77-05B.
790 $a 0028
791 $a Ph.D.
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3733364