本文關(guān)鍵詞： 二硫化鉬 炔基金屬化合物 配合物 表面修飾 鈣鈦礦太陽能電池　出處：《哈爾濱工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：二硫化鉬(MoS_2)是類似于碳材料的一種硫化物,最早人們用它作為汽車的潤滑劑,這和石墨的性質(zhì)類似。近幾年由于新型材料石墨烯的出現(xiàn),引起了人們對二維材料的關(guān)注與研究。研究表明當(dāng)MoS_2由塊體變成二維單層時(shí),雖然帶隙由1.29 eV變成了1.8 eV,但是帶隙類型卻由間接變成了直接帶隙。單層的MoS_2由于其特殊的電子結(jié)構(gòu),具有優(yōu)異的磁學(xué)、電學(xué)和光學(xué)性質(zhì),可以廣泛的用在各個(gè)領(lǐng)域。但是,由于MoS_2的化學(xué)惰性和不溶于一般常見溶劑,這就在很大程度上限制了它的應(yīng)用,于是研究人員就開始通過物理和化學(xué)修飾來改變MoS_2的物理和化學(xué)性質(zhì)。物理修飾主要是MoS_2和一些碳材料(比如石墨烯,碳納米管等)的復(fù)合,還有一些是有機(jī)物(比如氨基酸)的表面吸附;化學(xué)修飾主要是MoS_2中的S原子和其他的原子形成穩(wěn)定的化學(xué)鍵,然后研究修飾后MoS_2的性質(zhì)。本課題采用水熱法來合成MoS_2,然后通過SEM、XRD和拉曼對合成的MoS_2進(jìn)行表征,分析合成MoS_2的表面形貌和成分。實(shí)驗(yàn)中選用含有炔基的有機(jī)金屬化合物對MoS_2進(jìn)行表面修飾,用硝酸銀和苯乙炔、4-乙炔基苯甲酸甲酯和2-苯基-3-丁炔-2-醇來制備苯炔銀、4-乙炔基苯甲酸甲銀和2-苯基-3-丁炔-2-醇銀。先用溶液法將制備的MoS_2在超聲機(jī)中超聲分離成片層,等超聲完成后和含炔基的有機(jī)金屬銀化合物反應(yīng),反應(yīng)后通過一系列的表征方法對反應(yīng)后的產(chǎn)物進(jìn)行分析,通過實(shí)驗(yàn)和分析發(fā)現(xiàn),苯乙炔銀的表面修飾效果最好。由于課題要解決MoS_2的溶解性問題,故在反應(yīng)中采用不同的溶劑來進(jìn)行MoS_2和苯乙炔銀的反應(yīng),實(shí)驗(yàn)結(jié)果發(fā)現(xiàn)當(dāng)溶劑為N,N-二甲基甲酰胺(DMF)時(shí),重新分散的效果更好。確定了溶劑后,對反應(yīng)中MoS_2和苯乙炔銀反應(yīng)的物質(zhì)量的比進(jìn)行研究,實(shí)驗(yàn)中設(shè)置了中MoS_2和苯乙炔銀的物質(zhì)量比分別為1:1,1:1.5,1:2,通過分析實(shí)驗(yàn)結(jié)果發(fā)現(xiàn),當(dāng)MoS_2和苯乙炔銀的比為1:1.5時(shí),表面修飾的效果最佳。實(shí)驗(yàn)對修飾好的MoS_2進(jìn)行了應(yīng)用,將制得的MoS_2-PAS與聚(3,4-乙烯二氧噻吩)-聚苯烯磺酸(PEDOT:PSS)復(fù)合,用作鈣鈦礦太陽能電池的空穴傳輸層,由于MoS_2-PAS是一個(gè)新材料,它的應(yīng)用還處于探索階段,可能效果不是很明顯。
[Abstract]:Molybdenum disulfide (MoS _ 2) is a kind of sulfide similar to carbon material, which was first used as a lubricant for automobiles, which is similar to the properties of graphite. The results show that when MoS_2 is changed from block to monolayer, Although the band gap has changed from 1.29 EV to 1.8 EV, the band gap type has changed from indirect to direct band gap. Because of its special electronic structure, the monolayer MoS_2 has excellent magnetic, electrical and optical properties and can be widely used in various fields. Because MoS_2 is chemically inert and insoluble in common solvents, its application is limited to a large extent. So the researchers began to modify the physical and chemical properties of MoS_2 through physical and chemical modifications. The physical modification was mainly a combination of MoS_2 and some carbon materials, such as graphene, carbon nanotubes, etc. Some are adsorbed on the surface of organic matter (such as amino acids); the chemical modification mainly involves the formation of stable chemical bonds between S atoms and other atoms in MoS_2. Then, the properties of modified MoS_2 were studied. In this study, Mos _ 2 was synthesized by hydrothermal method, and then the synthesized MoS_2 was characterized by SEM XRD and Raman spectroscopy. The surface morphology and composition of synthesized MoS_2 were analyzed. Organometallic compounds containing alkynyl group were selected to modify the surface of MoS_2. Silver phenylacetylidene 4-acetylbenzoate and 2-phenyl-3-butyne-2-ol were prepared by using silver nitrate and phenylacetynyl 4-acetylbenzoate methyl ester and 2-phenyl-3-butyne-2-ol respectively. The MoS_2 was firstly separated into lamellar layer by solution method. After isonic reaction with organometallic silver compounds containing acetylene, the products were analyzed by a series of characterization methods. The surface modification of silver phenylacetylene is the best. Because the solubility of MoS_2 is to be solved, different solvents are used for the reaction between MoS_2 and silver phenylacetylene. The experimental results show that when the solvent is NN- dimethylformamide, The effect of redispersion was better. After determining the solvent, the mass ratio of MoS_2 and silver phenylacetylene was studied. In the experiment, the mass ratio of medium MoS_2 and silver phenylacetylene was 1: 1: 1: 1: 1. 5: 1: 2, respectively. The results of the analysis showed that the mass ratio of MoS_2 to silver phenylacetylene was 1: 1: 1: 1. When the ratio of MoS_2 to silver phenylacetylene is 1: 1.5, the effect of surface modification is the best. The modified MoS_2 is used in the experiment, and the MoS_2-PAS prepared is combined with PEDOT: PSS, which is composed of polytrioxothiophene 4-ethylenedioxythiophene and polyphenylethylenesulfonic acid (PEDOT: PSS). As the hole transport layer of perovskite solar cells, MoS_2-PAS is a new material, its application is still in the exploration stage, and the effect may not be obvious.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ136.12

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