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http://hdl.handle.net/11375/23822
Title: | A WATER-STABLE HYBRID ORGANIC-INORGANIC PEROVSKITE FOR SOLAR CELLS BY INORGANIC PASSIVATION |
Authors: | Tai, Guangqing |
Advisor: | Xu, Gu |
Department: | Materials Science and Engineering |
Publication Date: | 2019 |
Abstract: | Organic-inorganic hybrid halide perovskite solar cells (PSCs) have been a trending topic in recent years. Significant progress has been made to increase their power conversion efficiency (PCE) to more than 20%. However, the poor stability of PSCs in both working and non-working conditions results in rapid degradation through multiple environmental erosions such as water, heat, and UV light. Attempts have been made to resolve the rapid-degradation problems, including formula changes, transport layer improvements, and encapsulations, but none of these have effectively resolved the dilemma. This thesis reports our findings on adding inorganic films as surface-passivation layers on top of the hybrid perovskite materials, which not only enhance stability by eliminating weak sites but also prevent water penetration by using a water-stable layer. The surface-passivated hybrid perovskite layer indicates a slight increase of bandgap energy (Eg=1.76 eV), compared to the original methylammonium lead iodide (MAPbI3, Eg=1.61 eV) layer, allowing for more stable perovskite layer with a small sacrifice in the photoluminescence property, which represents a lower charge diffusion rate and higher bandgap energy. Our finding offers an alternative approach to resolving the low stability issue for PSC fabrication. |
Description: | This is a modified version for my previous uploaded thesis. |
URI: | http://hdl.handle.net/11375/23822 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Guangqing Tai, Master's Thesis, materials science and engineering.docx | 9.65 MB | Microsoft Word XML | View/Open |
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