本文關(guān)鍵詞： 二硫富瓦烯染料 D-A 給體 受體 可見光捕獲　出處：《太原理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：分子結(jié)構(gòu)為給體-受體(D-A)型的有機(jī)染料,具有分子內(nèi)電荷轉(zhuǎn)移的特性。由于有機(jī)染料制作成本低,摩爾消光系數(shù)高,分子結(jié)構(gòu)易于調(diào)整等優(yōu)點(diǎn),D-A型染料已被廣泛應(yīng)用在染料敏化太陽(yáng)能電池、有機(jī)小分子/聚合物電池等方面。在染料敏化太陽(yáng)能電池、有機(jī)小分子/聚合物電池中,D-A型有機(jī)染料起著捕獲太陽(yáng)光的作用,直接影響著電池的光電轉(zhuǎn)換效率,這說明研究D-A型有機(jī)染料對(duì)提高太陽(yáng)能電池效率具有重要的意義。本論文中,我們以D-A型二硫富瓦烯光捕獲染料為目標(biāo),通過電子受體以及共軛橋結(jié)構(gòu)等選擇對(duì)其光捕獲能力進(jìn)行了調(diào)控研究,并對(duì)它們?cè)谌玖厦艋?yáng)能電池及有機(jī)小分子電池等方面開展了應(yīng)用研究。取得了如下實(shí)驗(yàn)結(jié)果:1.合成了一系列二硫富瓦烯為電子給體,吡啶為電子受體,苯-噻吩和噻吩-苯為共軛橋的單體型有機(jī)染料DTFPy3和DTFPy4,以及與之對(duì)應(yīng)的兩個(gè)二聚體型有機(jī)染料D-DTFPy3和D-DTFPy4。實(shí)驗(yàn)結(jié)果表明:調(diào)整共軛橋上富電子噻吩靠近給體一端時(shí)可使有機(jī)染料的吸收波長(zhǎng)紅移;二聚體型分子可顯著提高有機(jī)染料的吸光強(qiáng)度,其吸收強(qiáng)度大約是單體的兩倍。在這四個(gè)有機(jī)染料中,D-DTFPy4表現(xiàn)出最佳的光捕獲能力,以其制備的染料敏化太陽(yáng)能電池,光電轉(zhuǎn)換效率可達(dá)5.26%。2.為了進(jìn)一步提高二硫富瓦烯染料對(duì)整個(gè)可見光區(qū)的捕獲能力,我們?cè)O(shè)計(jì)合成了以二硫富瓦烯為給體,苯-3,4-乙烯二氧噻吩-苯為共軛橋,三腈基呋喃衍生物(TCF)為電子受體的有機(jī)染料DTCF。實(shí)驗(yàn)結(jié)果表明:DTCF在溶液中具有兩個(gè)吸收峰,在四氫呋喃溶液中的吸收峰分別位于548 nm和401 nm,兩個(gè)吸收峰的摩爾消光系數(shù)分別為4.65×104 M~(-1) cm~(-1)和3.79×104M~(-1) cm~(-1),其吸收光譜可覆蓋整個(gè)可見光區(qū)。以其作為電子給體材料,PC61BM作為電子受體材料,制備了有機(jī)太陽(yáng)能電池,光電轉(zhuǎn)換效率達(dá)到0.28%。3.在有機(jī)染料DTCF分子結(jié)構(gòu)基礎(chǔ)上,設(shè)計(jì)合成了二聚體型有機(jī)染料D-DTCF。實(shí)驗(yàn)結(jié)果表明:與DTCF相比,二聚體D-DTCF可大大提高吸光度,其在四氫呋喃溶液中的吸收峰分別位于532 nm和401 nm,兩個(gè)吸收峰的摩爾消光系數(shù)分別達(dá)到了5.76×104 M~(-1) cm~(-1)和4.40×104 M~(-1) cm~(-1),大大提高了對(duì)可見光的捕獲能力,展示了用D-DTCF制備高效太陽(yáng)能電池的可能。
[Abstract]:The molecular structure is a donor-receptor D-A) type organic dye, which has the characteristics of intramolecular charge transfer. Due to the low production cost of organic dyes, high molar extinction coefficient, easy to adjust the molecular structure and so on. D-A dyes have been widely used in dye sensitized solar cells, organic small molecule / polymer batteries, dye sensitized solar cells and organic small molecule / polymer batteries. D-A organic dyes play a role in capturing solar light, and directly affect the photovoltaic conversion efficiency of the battery, which shows that the study of D-A organic dyes to improve the efficiency of solar cells is of great significance. The photocapture ability of D-A type dithioflavene dyes was studied by means of electron receptor and conjugate bridge structure. Their applications in dye sensitized solar cells and organic small molecular batteries were studied. The following experimental results were obtained: 1. A series of dithiofurane as electron donors and pyridine as electron receptors were synthesized. Benzothiophene and thiophene-benzene are conjugated bridge haplotype organic dyes DTFPy3 and DTFPy4. And the corresponding two dimer organic dyes D-DTFPy3 and D-DTFPy4.The experimental results show that:. When the electron rich thiophene on the conjugate bridge is close to the donor end, the absorption wavelength of organic dyes can be shifted red. Dimer molecules can significantly improve the absorptivity of organic dyes, which is about twice as high as that of monomers. Among the four organic dyes, D-DTFPy4 exhibits the best photocapture ability. With the dye sensitized solar cells, the photoelectric conversion efficiency can reach 5.26.2. in order to further improve the capture ability of dithiafurane dyes to the entire visible light region. We have designed and synthesized dithiafulvalene as donor and benzene-3n-4-ethylenedioxythiophene as conjugate bridge. TCFs, an organic dye with trisonitrile furan derivative, are electron acceptors. The experimental results show that there are two absorption peaks in the solution of TCF. The absorption peaks in tetrahydrofuran solution are located at 548 nm and 401 nm, respectively. The molar extinction coefficients of the two absorption peaks are 4.65 脳 10 ~ (4) M ~ (-1) cm ~ (-1) and 3.79 脳 10 ~ (4) M ~ (-1) 路cm ~ (-1) 路cm ~ (-1), respectively. Its absorption spectrum can cover the whole visible light region. Using PC61BM as the electron donor material as the electron receptor material, organic solar cells were prepared. The optoelectronic conversion efficiency reached 0.28. 3. Based on the molecular structure of organic dye DTCF, the dimer organic dye D-DTCFF was designed and synthesized. The experimental results show that it is compared with DTCF. The absorbance of dimer D-DTCF can be greatly improved. The absorption peaks of D-DTCF in tetrahydrofuran solution are located at 532 nm and 401 nm, respectively. The molar extinction coefficients of the two absorption peaks are 5.76 脳 10 ~ 4 m ~ (-1) 路cm ~ (-1) and 4.40 脳 10 ~ 4 m ~ (-1) 路cm ~ (-1) 路cm ~ (-1), respectively. The ability of capturing visible light is greatly improved, and the possibility of preparing high efficiency solar cells with D-DTCF is demonstrated.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM914.4

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