本文選題：石墨烯　切入點(diǎn)：化學(xué)勢(shì)　出處：《安徽大學(xué)》2015年碩士論文

【摘要】：自石墨烯(Graphene)問(wèn)世至今,其物理特性和光電特性備受各界學(xué)者的廣泛關(guān)注。石墨烯被認(rèn)為是現(xiàn)如今世界上最硬的材料,且其理論比表面積可達(dá)2630m2/g。作為石墨烯應(yīng)用最廣泛的特性之一,其光電特性可以通過(guò)調(diào)節(jié)溫度、頻率、電磁場(chǎng)等因素來(lái)改變�？傊�,作為一種新型的二維材料,石墨烯在儲(chǔ)能材料、半導(dǎo)體光電器件以及復(fù)合材料等領(lǐng)域有著很好的應(yīng)用前景。在大多數(shù)研究結(jié)構(gòu)中,吸收效率的提升和吸收諧振峰位置的可調(diào)諧已然成為研究學(xué)者們的關(guān)注要點(diǎn)。本文利用石墨烯的光電特性,即石墨烯的電導(dǎo)率和介電常數(shù)可以通過(guò)改變化學(xué)勢(shì)的大小進(jìn)行調(diào)節(jié),并借助頻域有限差分(the Finite Difference Frequency Domain,簡(jiǎn)稱(chēng)FDFD)方法的算法模擬,理論上實(shí)現(xiàn)了對(duì)非晶硅(the Amorphous Silicon,簡(jiǎn)稱(chēng)A-Si)太陽(yáng)能電池和嚴(yán)格耦合諧振器的吸收峰位置的可調(diào)諧以及吸收效率的提高。在此理論基礎(chǔ)上,研究分析了非晶硅太陽(yáng)能電池和嚴(yán)格耦合諧振器的反射、傳輸和吸收特性。本文的主要研究工作如下：1.簡(jiǎn)要闡述石墨烯薄膜材料的基本理論,包括其發(fā)現(xiàn)歷程、結(jié)構(gòu)組成、物理以及光學(xué)特性等。在石墨烯的理論基礎(chǔ)上,利用KuBo方程研究計(jì)算得石墨烯在不同環(huán)境條件下的電導(dǎo)率和介電常數(shù)公式,并探討了在可見(jiàn)光波段和紅外波段處的石墨烯電參數(shù)模型。2.簡(jiǎn)要討論了FDFD方法的發(fā)展歷史和基本原理,并對(duì)比闡述了FDFD方法在處理散射問(wèn)題、斜入射問(wèn)題和周期結(jié)構(gòu)等方面要優(yōu)于時(shí)域有限差分(theFinite-Difference Time-Domain,簡(jiǎn)稱(chēng)FDTD)方法。簡(jiǎn)要推導(dǎo)得出FDFD方法的理論公式,并推導(dǎo)得出在二維周期結(jié)構(gòu)中的FDFD算法構(gòu)造。3.在室溫條件下,調(diào)節(jié)石墨烯的化學(xué)勢(shì)大小,并結(jié)合FDFD方法,闡述了非晶硅太陽(yáng)能電池和嚴(yán)格耦合諧振器分別在可見(jiàn)光和紅外波段領(lǐng)域的吸收增強(qiáng)和諧振峰可調(diào)。然后,通過(guò)后處理技術(shù)分析這兩種結(jié)構(gòu)的反射、傳輸和吸收特性,以及總場(chǎng)分布。
[Abstract]:Since graphene (Graphene) so far, the physical properties and optical properties has attracted wide attention from scholars. Graphene is believed to be now the world's most hard materials, and the theory of surface area up to 2630m2/g. as one of the most widely used characteristics of graphene, its optical and electrical properties can be adjusted by temperature, frequency the electromagnetic field, and other factors to change. In a word, as a novel two-dimensional material, graphene in the energy storage material, the field of semiconductor optoelectronic devices and composite materials have a good application prospect. In most studies the structure, absorption efficiency and absorption resonance wavelength tunable has become a key focus of research the scholars. This paper uses the photoelectric properties of graphene, graphene is the electrical conductivity and dielectric constant can be adjusted by changing the size of the chemical potential, and using the finite-difference frequency-domain (the Finite D Ifference Frequency Domain, referred to as FDFD) simulation algorithm, realized the theory of amorphous silicon (the Amorphous Silicon, referred to as A-Si) absorption peak position of solar cell and strictly coupled resonator tunable and improve the absorption efficiency. On the basis of the theory, research and analysis of the reflection of amorphous silicon solar cell and strict coupling resonator, transmission and absorption properties. The main research work is as follows: 1. briefly describes the basic theory of graphene films, including the history of the discovery, structure, physical and optical properties. Based on the theory of graphene, graphene was calculated under different conditions of permittivity and conductivity formula based on KuBo equation, and discusses in the visible band and infrared band of the graphene electrical parameter model.2. FDFD method is briefly discussed the development history and basic principles Daniel, and illustrated the FDFD method in dealing with scattering problems on the oblique incidence and periodic structure is better than the finite difference time domain (theFinite-Difference Time-Domain, referred to as FDTD) method. The theoretical formula are derived FDFD method, and deduced in Er Weizhou period structure of the FDFD algorithm for.3. at room temperature, chemical the potential to adjust the size of graphene, and combined with the FDFD method, describes the amorphous silicon solar cell and the rigorous coupled resonator are absorption enhancement of resonant peaks can be adjusted in the visible and infrared field. Then, after the analysis of reflection processing technology of these two kinds of structure, transmission and absorption properties, and the field distribution.

【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TQ127.11

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 魯思龍;吳先良;任信鋼;梅詣Pr;沈晶;黃志祥;;色散周期結(jié)構(gòu)的輔助場(chǎng)時(shí)域有限差分法分析[J];物理學(xué)報(bào);2012年19期

2 李彪;徐大海;曾暉;;邊緣重構(gòu)對(duì)鋸齒型石墨烯納米帶電子輸運(yùn)的影響[J];物理學(xué)報(bào);2014年11期

3 王輝;黃志祥;吳先良;任信鋼;;Perfect plane-wave source for a high-order symplectic finite-difference time-domain scheme[J];Chinese Physics B;2011年11期

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本文編號(hào)：1669078