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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/49826

Title: 新穎鈣鈦礦薄膜之光學與結構特性研究
Temperature-Dependent Optical and Structural Properties of Perovskite Thin Films
Authors: Yin, Guo-Zhong
尹國仲
Contributors: NTOU:Department of Electrical Engineering
國立臺灣海洋大學:電機工程學系
Keywords: 鈣鈦礦;光激螢光;時間鑑別光激螢光;侷域深度;熱活化能
Perovskite;Photoluminescence;Time-Resolved Photoluminescence;Localization;Thermal activation energy
Date: 2017
Issue Date: 2018-08-22T07:12:33Z
Abstract: 在本論文中,我們進行隨溫度變化之光激螢光及時間鑑別光激螢光光譜探討兩種鈣鈦礦結構材料 CH3NH3PbI3 及 CH3NH3PbI3-xClx 在正交晶系下侷域效應影響之探討。 在光激螢光光譜中,我們觀察到CH3NH3PbI3及CH3NH3PbI3-xClx在隨溫度變化下,在12 K至80 K之間,觀察到正交晶系與四方晶系共存所導致發光強度有不正常的行為,在160 K相變成四方晶系具有明顯藍位移之現象。分析半高寬隨溫度變化下得到CH3NH3PbI3及CH3NH3PbI3-xClx低溫之光學聲子能量分別約18.75 meV 及 22.71 meV。在低溫時間鑑別光激螢光譜中,我們得知正交晶系夾雜四方晶系狀態下所形成的侷限深度分別約 22.3 meV 及 26.2 meV。藉由低溫量測瞭解CH3NH3PbI3及CH3NH3PbI3-xClx其正交晶系結構發光特性,以利擴展鈣鈦礦材料所應用領域。
In this study, we present the localization effects in orthorhombic phase of CH3NH3PbI3 and CH3NH3PbI3-xClx perovskite materials by temperature-dependent photoluminescence and time-resolved photoluminescence. Our investigations indicate that the tetragonal inclusions in the orthorhombic phase of CH3NH3PbI3 and CH3NH3PbI3-xClx at low temperature are the main reason for the formation of localization states with a depth of about 22.3 meV and 26.2 meV. The coexistence of the tetragonal and orthorhombic phases also results in an abnormal behavior of luminescence intensity from 12 to 80 K. In full width at half maximum of PL spectra , An optical phonon energy of 18.75 meV and 22.71 meV were estimated. The detailed understanding of luminescence characteristics upon the orthorhombic phase in CH3NH3PbI3 and CH3NH3PbI3-xClx at low temperature can expand ideally the application fields of perovskite materials.
URI: http://ethesys.lib.ntou.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=G0010453027.id
http://ntour.ntou.edu.tw:8080/ir/handle/987654321/49826
Appears in Collections:[電機工程學系] 博碩士論文

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