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Understanding the Slow Transient Opt...
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Jacobs, Daniel Louis.
Understanding the Slow Transient Optoelectronic Response of Hybrid Organic-Inorganic Halide Perovskites.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Understanding the Slow Transient Optoelectronic Response of Hybrid Organic-Inorganic Halide Perovskites.
作者:
Jacobs, Daniel Louis.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, 2017
面頁冊數:
132 p.
附註:
Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
附註:
Adviser: Ling Zang.
Contained By:
Dissertation Abstracts International78-10B(E).
標題:
Materials science.
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10258583
ISBN:
9781369775044
Understanding the Slow Transient Optoelectronic Response of Hybrid Organic-Inorganic Halide Perovskites.
Jacobs, Daniel Louis.
Understanding the Slow Transient Optoelectronic Response of Hybrid Organic-Inorganic Halide Perovskites.
- Ann Arbor : ProQuest Dissertations & Theses, 2017 - 132 p.
Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
Thesis (Ph.D.)--The University of Utah, 2017.
Hybrid organic-inorganic halide perovskites, particularly methylammonium lead triiodide (MAPbI3), have emerged within the past decade as an exciting class of photovoltaic materials. In less than ten years, MAPbI3-based photovoltaic devices have seen unprecedented performance growth, with photoconversion efficiency increasing from 3% to over 22%, making it competitive with traditional high-efficiency solar cells. Furthermore, the fabrication of MAPbI3 devices utilize low-temperature solution processing, which could facilitate ultra low cost manufacturing. However, MAPbI3 suffers from significant instabilities under working conditions that have limited their applications outside of the laboratory. The instability of the MAPbI3 material can be generalized as a complex, slow transient optoelectronic response (STOR). The mechanism of the generalized STOR is dependent on the native defects of MAPbI3, but detailed understanding of the material defect properties is complicated by the complex ionic bonding of MAPbI3. Furthermore, characterization of the intrinsic material's response is complicated by the diverse approach to material processing and device architecture across laboratories around the world. In order to understand and mitigate the significant problems of MAPbI3 devices, a new approach focused on the material response, rather than the full device response, must be pursued.
ISBN: 9781369775044Subjects--Topical Terms:
221779
Materials science.
Understanding the Slow Transient Optoelectronic Response of Hybrid Organic-Inorganic Halide Perovskites.
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Hybrid organic-inorganic halide perovskites, particularly methylammonium lead triiodide (MAPbI3), have emerged within the past decade as an exciting class of photovoltaic materials. In less than ten years, MAPbI3-based photovoltaic devices have seen unprecedented performance growth, with photoconversion efficiency increasing from 3% to over 22%, making it competitive with traditional high-efficiency solar cells. Furthermore, the fabrication of MAPbI3 devices utilize low-temperature solution processing, which could facilitate ultra low cost manufacturing. However, MAPbI3 suffers from significant instabilities under working conditions that have limited their applications outside of the laboratory. The instability of the MAPbI3 material can be generalized as a complex, slow transient optoelectronic response (STOR). The mechanism of the generalized STOR is dependent on the native defects of MAPbI3, but detailed understanding of the material defect properties is complicated by the complex ionic bonding of MAPbI3. Furthermore, characterization of the intrinsic material's response is complicated by the diverse approach to material processing and device architecture across laboratories around the world. In order to understand and mitigate the significant problems of MAPbI3 devices, a new approach focused on the material response, rather than the full device response, must be pursued.
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This dissertation highlights the work to analyze and mitigate the STOR intrinsic to MAPbI3. An experimental platform was developed based on lateral interdigitated electrode (IDE) arrays capable of monitoring the current and photoluminescence response simultaneously. By correlating the dynamics of the current and photoluminescence (PL) responses, both charge trapping and ion migration mechanisms were identified to contribute to the STOR. Next, a novel fabrication technique is introduced that is capable of reliably depositing MAPbI3 thin films with grain sizes at least an order of magnitude larger than most common techniques. These films were studied with confocal microscopy to give insight into the intra-grain PL dynamics of MAPbI3. Finally, the lateral IDE device platform was used to study the composition and morphology dependent STOR and revealed important correlations between defect formation and the STOR. These results represent an important step toward realizing a deeper understanding of the intrinsic limitations of MAPbI3 needed to progress the technology outside of the laboratory.
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