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Materials Stability of Organometal Halides for Solar Cell Applications
Başlık:
Materials Stability of Organometal Halides for Solar Cell Applications
Yazar:
Wang, Congcong, author.
ISBN:
9780355975093
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (166 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
Advisors: Yongli Gao Committee members: Stephen Burns; Lewis Rothberg; Alexander Shestopalov.
Özet:
In recent years, organic-inorganic halide perovskites have emerged as a promising semiconductor family because of their remarkable performance in optoelectronic devices. While many studies have been carried out on the performance of perovskite solar cells, the long-term stability is being considered as one of the critical issues for the commercial application and is still lack of understanding. To better solve the problem, fundamental investigations of the intrinsic properties such as the electronic structure and the chemical states of the materials are urgently in need. The factors that really trigger the decomposition of perovskites should be clarified so that the devices produced in the future can deal with the problems specifically. Most previous stability studies are based merely on the change of macroscopic device performance, and have typically been carried out in ambient conditions without quantitative control of environmental factors. These make it difficult to compare results from different labs and gain insights into the intrinsic decomposition process. Therefore, a close look at the surface analytical level of the changes of the perovskite layer with controllable exposure tests would help to reveal the degradation mechanisms and to optimize perovskite solar cells in the long run. This thesis covers the quantitative and systematic stability studies of perovskite thin films prepared by thermal co-evaporation and spin-coating and perovskite single crystals cleaved inside the vacuum chamber. I have investigated the factors such as X-ray, N2, O2, H2O, and annealing that influence the stability of perovskites under ambient conditions. The surface analytic tools including photoemission and inverse photoemission spectroscopy and atomic force microscopy, and other tools such as X-ray diffraction and scanning electron microscopy have been used to provide the insight views of the degradation mechanisms of perovskites and help pave the way to higher efficiency perovskite solar cells.
Notlar:
School code: 0188
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(680204.1) | 680204-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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