有機/無機混成鈣鈦礦高分子奈米複合材料之合成與物性研究

Studies on the synthesis and physical properties of organic-inorganic hybrid perovskites polymer nanocomposite

侯文棋(Wen-Chi Hou)

指導教授 ： 廖建勛

元智大學/工程學院/化學工程與材料科學學系/碩士(2003年)

摘要

摘要
本研究以合成的方式製備有機/無機混成鈣鈦礦材料，其通式可表示為(C6H13NH3)2(CH3NH3)m-1PbmBr3m+1(m= 1, 2 and 3)，藉由合成時的化學計量數調配及環境控制可達到調整無機層結構的目的。利用儀器分析了解有機/無機鈣鈦礦材料之特性， 探討其不同層數結構對其物理性質及電性質的影響。因有機/無機鈣鈦礦材料之可溶性，在溶液中製備高分子奈米複合材料，探討不同的奈米分散效果對其性質的影響。
經XRD分析發現結晶結構的層間距離隨著無機層數的增加而等距離增加，證實了材料結構如合成時所預期。隨著無機層數的增加，吸收光譜及PL光譜都產生紅位移(red shift)，證實可藉由結構的調整達到調整能隙的目的。經由介電分析瞭解此材料的介電常數值與無機層數有著密切的關係，但也因為層數的增加會造成材料的導電度鬆弛時間分佈的變大。另外也證實了載子的遷移率(mobility)的確會因無機層數的增加而增加。奈米高分子複合材料部分，經由XRD證實了在成膜後的高分子膜中的確造成不同的分散效果，層間距離也因此而有所改變，分散的效果與高分子的側鏈基有著密切的關連。在吸收光譜及PL光譜上因為高分子的加入與層狀結構的改變而有著明顯的變化。從DEA分析發現高分子複合材料中的載子躍遷活化能會因為不同高分子造成很大的差別，並且會影響導電度鬆弛轉移溫度。

關鍵字

有機/無機混成 ； 鈣鈦礦 ； 高分子奈米複合材料

並列摘要

Abstract
In this study, the organic-inorganic layer perovskite compound (C6H13NH3)2(CH3NH3)m-1PbmBr3m+1 were composed. We can control the inorganic layer thickness by changing the stoichiometry of reactants and reacting environment. They are characterized by use of instrument analysis in order to investigate the relationship between inorganic layers and physical properties and electrical properties. Because of the solubility of this materials we can synthesis polymer nanocompoiste in solution. Then we discuss the effect with different nanodisperse.
XRD results showed that the d-spacing increases at constant value with increase the inorganic layers which identified our expectation. The UV-Vis and PL results had red-shift when increase the inorganic layers. The phenomena show that the energy gap can be changed by tunneling the layer structure. By dielectric analysis we understand the dielectric constant is corresponding to the numbers of inorganic layers. Conductivity relaxation time distribution increase when the numbers of inorganic layer increase. We also identified the carrier mobility will increase when the numbers of inorganic layers increase. In polymer nanocompoist, we found different nanodisperse. The UV-Vis and PL spectrum had substantial change when adding polymer and different layer structure. From DEA analysis, we found that different polymer will cause different carrier hoping activity energy and conductivity relaxation conversion temperature.

並列關鍵字

Organic-inorganic ； perovskite ； polymer nanocomposite

參考文獻

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