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標題: | 高空氣穩定性二維類核殼結構錫鈣鈦礦光致發光材料 High air stability two-dimensional core shell like structure tin-based perovskite photoluminescence material |
作者: | Yu-Kai Hu 胡育愷 |
指導教授: | 周必泰(Pi-Tai Chou) |
關鍵字: | 錫基鈣鈦礦,無鉛鈣鈦礦,低維度鈣鈦礦,二維材料,發光材料, Tin-based perovskites,Lead-free perovskites,Low-dimensional perovskites,Two-dimensional material,Photoluminescence material, |
出版年 : | 2019 |
學位: | 碩士 |
摘要: | 錫基鈣鈦礦是一種很有前景的半導體材料,且最具前瞻性的鉛替代品。根據理論和實驗,錫基鈣鈦礦表現出較窄的帶隙和與鉛類似的光電特性。然而,錫基鈣鈦礦的空氣穩定性差,阻礙了實際應用的發展。許多團隊已經做出了很多努力,例如添加額外的氯化亞錫 (SnF2) 作為補償劑或者將維度從三維降到二維鈣鈦礦以防止四價錫的產生。因此,合成了具有化學式TEA2SnI4(TEA = 噻吩基乙基銨)的新型鈣鈦礦納米板,通過將具有強化學相互作用的硫氰酸銨(NH4SCN)添加劑引入到錫基鈣鈦礦中,可以顯著提高其空氣穩定性和光致發光性能。在優化的條件下,我們的結果顯示錫基鈣鈦礦的空氣穩定性實際上得到改善。此外,光致發光量子產率(PLQY)可達22 %。 Tin-based perivskite is a promising semiconductor material and is the most forward-looking candidates of lead alternative. According to theory and experiment, tin-based perovskite exhibits narrower band gap and comparable photoelectric properties to lead analog. However, the poor oxidative stability of tin-based perovskite has hindered the development for real application. Many groups have contributed a lot of efforts, such as adding extra SnF2 as compensator or decreasing the dimensionality form three-dimensional to two-dimensional perovskite to prevent Sn4+ generation. Hence, new tin perovskite nanoplates with chemical formula TEA2SnI4 (TEA = thienylethylammonium) is synthesized and its air stability and photoluminescence property can be significantly enhanced by introducing ammonium thiocyanate (NH4SCN) additive with strong chemical interactions to Sn2+ into 2D tin-based perovskites. Under optimized condition, our results show that the air stability of tin perovskite is actually improved. Besides, the photoluminescence quantum yield (PLQY) can reach to 22%. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/7212 |
DOI: | 10.6342/NTU201903018 |
全文授權: | 同意授權(全球公開) |
電子全文公開日期: | 2024-08-20 |
顯示於系所單位: | 化學系 |
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檔案 | 大小 | 格式 | |
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ntu-108-1.pdf 此日期後於網路公開 2024-08-20 | 3.89 MB | Adobe PDF |
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