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

Examination and Mitigation of Electr...

Hoffeditz, William Lawrence.

Linked to FindBook

Google Book

Amazon

博客來

Examination and Mitigation of Electron Interception Processes in Dye-sensitized Solar Cells through Redox Shuttle and Photoelectrode Modification.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Examination and Mitigation of Electron Interception Processes in Dye-sensitized Solar Cells through Redox Shuttle and Photoelectrode Modification./
Author:	Hoffeditz, William Lawrence.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	190 p.
Notes:	Source: Dissertation Abstracts International, Volume: 78-08(E), Section: B.
Contained By:	Dissertation Abstracts International78-08B(E).
Subject:	Physical chemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10257505
ISBN:	9781369679328

Examination and Mitigation of Electron Interception Processes in Dye-sensitized Solar Cells through Redox Shuttle and Photoelectrode Modification.
Hoffeditz, William Lawrence.

Examination and Mitigation of Electron Interception Processes in Dye-sensitized Solar Cells through Redox Shuttle and Photoelectrode Modification. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 190 p.

Source: Dissertation Abstracts International, Volume: 78-08(E), Section: B.

Thesis (Ph.D.)--Northwestern University, 2017.

With the dual challenges of meeting global energy demand and mitigating anthropogenic climate change, significant effort is being applied to generating power from renewable sources. The dye-sensitized solar cell (DSC) is a photovoltaic technology capable of generating electricity from sunlight, but suffers losses in efficiency due to deleterious electron transfer processes. Controlling these processes is essential if DSCs are to continue to advance, and this dissertation focuses on isolation, interrogation, and mitigation of these processes via controllable inorganic redox/coordination chemistry and atomic layer deposition (ALD).

ISBN: 9781369679328Subjects--Topical Terms:

1981412
Physical chemistry.

Examination and Mitigation of Electron Interception Processes in Dye-sensitized Solar Cells through Redox Shuttle and Photoelectrode Modification.
LDR:03636nmm a2200337 4500 001 2153479
005 20171130090821.5
008 190424s2017 ||||||||||||||||| ||eng d
020 $a 9781369679328
035 $a (MiAaPQ)AAI10257505
035 $a AAI10257505
040 $a MiAaPQ $c MiAaPQ
100 1 $a Hoffeditz, William Lawrence. $0 (orcid)0000-0003-2257-4331 $3 3341205
245 1 0 $a Examination and Mitigation of Electron Interception Processes in Dye-sensitized Solar Cells through Redox Shuttle and Photoelectrode Modification.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 190 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-08(E), Section: B.
500 $a Advisers: Joseph T. Hupp; Michael J. Pellin.
502 $a Thesis (Ph.D.)--Northwestern University, 2017.
520 $a With the dual challenges of meeting global energy demand and mitigating anthropogenic climate change, significant effort is being applied to generating power from renewable sources. The dye-sensitized solar cell (DSC) is a photovoltaic technology capable of generating electricity from sunlight, but suffers losses in efficiency due to deleterious electron transfer processes. Controlling these processes is essential if DSCs are to continue to advance, and this dissertation focuses on isolation, interrogation, and mitigation of these processes via controllable inorganic redox/coordination chemistry and atomic layer deposition (ALD).
520 $a The redox shuttle is often the subject of innovation in DSCs, the goal being to increase obtainable photovoltage without sacrificing photocurrent. A copper redox shuttle with a favorable (II/I) redox potential for DSC use and intriguing inner-sphere reorganization energy was investigated. The shuttle completely replaces its tetradentate coordinating ligand upon oxidation with multiple pyridine molecules. This new species displays markedly slower electron interception, necessitating fabrication of a new counter electrode in order for the shuttle to function. Upon reduction, the tetradentate ligand re-coordinates, creating a dual-species shuttle that outperforms either species as a Cu(II/I) shuttle in isolation.
520 $a Photoelectrode modification is also the subject of innovation in DSCs. ALD is ideally suited for this type of innovation as it can coat high aspect surfaces with metal-oxide films of uniform thickness. The ALD post-treatment technique is described and used to deposit Al2O3 around a TiO2 adsorbed zinc-porphyrin dye. This technique is shown to prevent dye degradation from ambient air and/or light. Additionally, the architecture allows the study of dye-influenced electron interception processes. It was found that the presence of dye increased interception, which was attributed to dye-mediated electron hopping and/or superexchange mechanisms.
520 $a Finally, ALD was used to fabricate thin-film Nb2O5, which is a promising overcoat material to potentially improved photovoltage without harming charge injection. The conduction band potential of films specifically fabricated via ALD was thus determined and compared to that of TiO2 films fabricated by ALD. Taken together, the research presented herein increases the underlying understanding of the numerous complicated electron transfer processes in DSC-type devices and offers new strategies to combat deleterious processes, specifically electron interception.
590 $a School code: 0163.
650 4 $a Physical chemistry. $3 1981412
650 4 $a Alternative Energy. $3 1035473
650 4 $a Materials science. $3 543314
690 $a 0494
690 $a 0363
690 $a 0794
710 2 $a Northwestern University. $b Chemistry. $3 1030729
773 0 $t Dissertation Abstracts International $g 78-08B(E).
790 $a 0163
791 $a Ph.D.
792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10257505