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Using (Photo)Electrochemistry to Evaluate Organic Semiconductor Stability.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Using (Photo)Electrochemistry to Evaluate Organic Semiconductor Stability./
Author:	Hamstra, Anna.
Description:	1 online resource (51 pages)
Notes:	Source: Masters Abstracts International, Volume: 84-11.
Contained By:	Masters Abstracts International84-11.
Subject:	Analytical chemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30490345click for full text (PQDT)
ISBN:	9798379525880

Using (Photo)Electrochemistry to Evaluate Organic Semiconductor Stability.
Hamstra, Anna.

Using (Photo)Electrochemistry to Evaluate Organic Semiconductor Stability. - 1 online resource (51 pages)

Source: Masters Abstracts International, Volume: 84-11.

Thesis (M.S.)--The University of Arizona, 2023.

Includes bibliographical references

Organic photovoltaics (OPV) are solar cell devices that convert light into electricity using organic semiconductors as the photoactive layers. These devices consist of multiple layers to effectively control charge generation and transport. Critically, performance losses can arise due to the degradation of the organic semiconductors and/or interfaces with charge harvesting electrodes. My research focuses on the development of capabilities to assess changes in charge transport processes after degradation, which will pave the way to better understand the effect that the presence of photogenerated charge carriers has on device degradation. This research falls in an important, but uninvestigated area that connects molecular degradation mechanisms with device performance. The three-electrode photo(electrochemical) technique enables tracking of the charge flow in half-cell stacked structures to study individual layers. Unique about this approach is the use of a gel electrolyte that acts as a removable top contact, allowing the study of the photoactive layer after degradation. Additionally, the incorporation of the reference electrode allows determination of energy levels and predict material performance under relevant electric fields. Validation of this technique was done using P3HT, a well characterized polymer. Additionally, as a proof of concept, the degradation of a blended heterojunction was monitored using electrochemistry and surface chemistry. (Spectro)electrochemistry and photoelectron spectroscopic methods were then used to demonstrate a pathway towards operando degradation characterization by evaluating the chemical makeup, absorbance, and microstructure of the active layer before and after running the device. Future studies can focus on the interconnected structure-property relationships, including phase segregation and the evolution of injection/extraction barriers at buried interfaces for a variety of optoelectronic and photoelectrochemical device platforms.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798379525880Subjects--Topical Terms:

3168300
Analytical chemistry.
Subjects--Index Terms:

ElectrochemistryIndex Terms--Genre/Form:

542853
Electronic books.

Using (Photo)Electrochemistry to Evaluate Organic Semiconductor Stability.
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504 $a Includes bibliographical references
520 $a Organic photovoltaics (OPV) are solar cell devices that convert light into electricity using organic semiconductors as the photoactive layers. These devices consist of multiple layers to effectively control charge generation and transport. Critically, performance losses can arise due to the degradation of the organic semiconductors and/or interfaces with charge harvesting electrodes. My research focuses on the development of capabilities to assess changes in charge transport processes after degradation, which will pave the way to better understand the effect that the presence of photogenerated charge carriers has on device degradation. This research falls in an important, but uninvestigated area that connects molecular degradation mechanisms with device performance. The three-electrode photo(electrochemical) technique enables tracking of the charge flow in half-cell stacked structures to study individual layers. Unique about this approach is the use of a gel electrolyte that acts as a removable top contact, allowing the study of the photoactive layer after degradation. Additionally, the incorporation of the reference electrode allows determination of energy levels and predict material performance under relevant electric fields. Validation of this technique was done using P3HT, a well characterized polymer. Additionally, as a proof of concept, the degradation of a blended heterojunction was monitored using electrochemistry and surface chemistry. (Spectro)electrochemistry and photoelectron spectroscopic methods were then used to demonstrate a pathway towards operando degradation characterization by evaluating the chemical makeup, absorbance, and microstructure of the active layer before and after running the device. Future studies can focus on the interconnected structure-property relationships, including phase segregation and the evolution of injection/extraction barriers at buried interfaces for a variety of optoelectronic and photoelectrochemical device platforms.
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