基于苯并二噻吩和萘并噻吩單元的有機(jī)光伏材料的合成與性能研究
發(fā)布時(shí)間：2019-04-27 12:14
【摘要】：有機(jī)太陽能電池(OSCs),由于原材料來源豐富、質(zhì)量輕、成本低、可制備大面積柔性薄膜電池組件等優(yōu)點(diǎn),已成為世界各國新能源開發(fā)與利用的重要方向。本論文系統(tǒng)闡述了有機(jī)太陽能電池的發(fā)展進(jìn)程,并著重介紹了苯并噻吩衍生物在有機(jī)太陽能電池供體材料上的應(yīng)用。針對(duì)當(dāng)前有機(jī)太陽能電池供體材料載流子遷移率及能量轉(zhuǎn)換效率偏低等缺點(diǎn),本論文在供體材料內(nèi)引入大平面苯并噻吩衍生物(苯并二噻吩和萘并噻吩單元),有效提高了分子間的π-π堆積性能和自組裝行為,最終提高了供體材料載流子遷移率及能量轉(zhuǎn)換效率。設(shè)計(jì)合成了4個(gè)有機(jī)光伏供體材料,系統(tǒng)研究了供體材料的分子結(jié)構(gòu)對(duì)電池器件性能的影響,研究內(nèi)容如下:1.設(shè)計(jì)并合成了一類主鏈給體-共軛側(cè)鏈?zhǔn)荏w的D-A型共軛聚合物PIDTBDTID和PIDTBDT(ID)2,以苯并二噻吩(BDT)及引達(dá)省并二噻吩(IDT)單元為主鏈給體(D)單元,噻吩乙烯為鏈接,在側(cè)鏈末端引入單/雙異靛藍(lán)(ID)受體單元。系統(tǒng)研究了聚合物的熱穩(wěn)定性、光物理、電化學(xué)及光伏性能。研究發(fā)現(xiàn):側(cè)鏈掛接一個(gè)ID單元的共聚物PIDTBDTID表現(xiàn)出更好的光吸收性能和電荷傳輸能力,其光伏器件能量轉(zhuǎn)換效率(PCE)相對(duì)較高(2.66%);掛接兩個(gè)ID單元的共聚物PIDTBDT(ID)2展現(xiàn)出了更低的最高被占用分子軌道能級(jí)(HOMO能級(jí)),光伏器件的開路電壓達(dá)到0.93 V。2.設(shè)計(jì)合成了以4,9-二(噻吩-2-基)萘并[2,3-b]噻吩(DTNT)為給體D單元,吡咯并吡咯二酮(DPP)為受體A單元,菲(PN)為端基單元,新型有機(jī)小分子供體材料DTNT-3DPP和DTNT(DPP-PN)_3。研究發(fā)現(xiàn):DTNT-3DPP和DTNT(DPP-PN)_3在分子平面性、光吸收和電荷傳輸性能方面均優(yōu)于文獻(xiàn)報(bào)道的基于三苯胺(TPA)為中心的星型小分子TPA-3DPP和TPA(DPP-PN)_3,基于DTNT-3DPP和DTNT(DPP-PN)_3的光伏器件PCE分別為3.47和3.69%,其中基于DTNT-3DPP的光伏器件PCE值是TPA-3DPP的1.82倍。這說明相對(duì)于TPA,新型DTNT給體D單元有利于改善供體分子平面性,提高材料光伏性能。
[Abstract]:Due to the advantages of abundant raw materials, light weight and low cost, organic solar cell (OSCs),) has become an important direction of new energy development and utilization in the world because of its advantages such as preparing large-area flexible thin film cell modules and so on. In this paper, the development of organic solar cells is systematically described, and the application of benzothiophene derivatives in donor materials of organic solar cells is emphatically introduced. In order to overcome the disadvantages of low carrier mobility and energy conversion efficiency of organic solar cell donor materials, large plane benzothiophene derivatives (benzothiophene and naphthothiophene units) were introduced into the donor materials in this paper. The 蟺-蟺 stacking performance and self-assembly behavior of the donor materials were improved effectively, and the carrier mobility and energy conversion efficiency of the donor materials were finally improved. Four organic photovoltaic donor materials were designed and synthesized. The effects of the molecular structure of the donor materials on the performance of cell devices were systematically studied. The contents are as follows: 1. A class of D-A conjugated polymers, PIDTBDTID and PIDTBDT (ID)-2, of main chain donor-conjugated side chain receptors were designed and synthesized. The main chain donor (D) units were benzodithiophene (BDT) and Dithiophene (IDT) units. Thiophene ethylene as a link, at the end of the side chain introduced a single / double isoindigo (ID) receptor unit. The thermal stability, photophysical, electrochemical and photovoltaic properties of the polymers were systematically studied. It is found that the copolymer PIDTBDTID with a side chain attached to a ID unit exhibits better optical absorption performance and charge transfer ability, and the energy conversion efficiency of photovoltaic devices is relatively high (2.66%), and the energy conversion efficiency of photovoltaic devices is higher than that of photovoltaic devices (2.66%). The copolymer PIDTBDT (ID) 2 with two ID units shows a lower maximum occupied molecular orbital energy level (HOMO energy level), and the open circuit voltage of photovoltaic devices is 0.93V.2. Using 4,9-bis (thiophene-2-yl) naphtho [2,3 渭 b] thiophene (DTNT) as donor D unit, pyrrole pyrrolidone (DPP) as receptor A unit and phenanthrene (PN) as terminal unit, we designed and synthesized 4,9-bis (thiophene-2-yl) naphtho [2,3 渭 b] thiophene as donor D unit. New Organic small Molecular donor Materials DTNT-3DPP and DTNT (DPP-PN) _ 3. It is found that DTNT-3DPP and DTNT (DPP-PN) _ 3 are superior to TPA-3DPP and TPA (DPP-PN) _ 3 in molecular planarity, light absorption and charge transfer, which are based on triphenylamine (TPA). The PCE of photovoltaic devices based on DTNT-3DPP and DTNT (DPP-PN) _ 3 is 3.47% and 3.69%, respectively. Among them, the PCE value of photovoltaic devices based on DTNT-3DPP is 1.82 times higher than that of TPA-3DPP. This shows that compared with the new DTNT donor D unit of TPA, the donor molecular planarity is improved and the photovoltaic performance of the material is improved.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM914.4;O626.12
本文編號(hào)：2466976
[Abstract]:Due to the advantages of abundant raw materials, light weight and low cost, organic solar cell (OSCs),) has become an important direction of new energy development and utilization in the world because of its advantages such as preparing large-area flexible thin film cell modules and so on. In this paper, the development of organic solar cells is systematically described, and the application of benzothiophene derivatives in donor materials of organic solar cells is emphatically introduced. In order to overcome the disadvantages of low carrier mobility and energy conversion efficiency of organic solar cell donor materials, large plane benzothiophene derivatives (benzothiophene and naphthothiophene units) were introduced into the donor materials in this paper. The 蟺-蟺 stacking performance and self-assembly behavior of the donor materials were improved effectively, and the carrier mobility and energy conversion efficiency of the donor materials were finally improved. Four organic photovoltaic donor materials were designed and synthesized. The effects of the molecular structure of the donor materials on the performance of cell devices were systematically studied. The contents are as follows: 1. A class of D-A conjugated polymers, PIDTBDTID and PIDTBDT (ID)-2, of main chain donor-conjugated side chain receptors were designed and synthesized. The main chain donor (D) units were benzodithiophene (BDT) and Dithiophene (IDT) units. Thiophene ethylene as a link, at the end of the side chain introduced a single / double isoindigo (ID) receptor unit. The thermal stability, photophysical, electrochemical and photovoltaic properties of the polymers were systematically studied. It is found that the copolymer PIDTBDTID with a side chain attached to a ID unit exhibits better optical absorption performance and charge transfer ability, and the energy conversion efficiency of photovoltaic devices is relatively high (2.66%), and the energy conversion efficiency of photovoltaic devices is higher than that of photovoltaic devices (2.66%). The copolymer PIDTBDT (ID) 2 with two ID units shows a lower maximum occupied molecular orbital energy level (HOMO energy level), and the open circuit voltage of photovoltaic devices is 0.93V.2. Using 4,9-bis (thiophene-2-yl) naphtho [2,3 渭 b] thiophene (DTNT) as donor D unit, pyrrole pyrrolidone (DPP) as receptor A unit and phenanthrene (PN) as terminal unit, we designed and synthesized 4,9-bis (thiophene-2-yl) naphtho [2,3 渭 b] thiophene as donor D unit. New Organic small Molecular donor Materials DTNT-3DPP and DTNT (DPP-PN) _ 3. It is found that DTNT-3DPP and DTNT (DPP-PN) _ 3 are superior to TPA-3DPP and TPA (DPP-PN) _ 3 in molecular planarity, light absorption and charge transfer, which are based on triphenylamine (TPA). The PCE of photovoltaic devices based on DTNT-3DPP and DTNT (DPP-PN) _ 3 is 3.47% and 3.69%, respectively. Among them, the PCE value of photovoltaic devices based on DTNT-3DPP is 1.82 times higher than that of TPA-3DPP. This shows that compared with the new DTNT donor D unit of TPA, the donor molecular planarity is improved and the photovoltaic performance of the material is improved.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM914.4;O626.12
【參考文獻(xiàn)】
相關(guān)期刊論文 前3條
1 張敬爽;胡湛晗;王美麗;張靜;劉紅云;劉婕;;太陽能電池研究進(jìn)展[J];化工新型材料;2016年11期
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3 李針英;孫建平;王亮;周小波;凌啟淡;;基于苯并二噻吩的D-A型窄帶隙共軛聚合物在太陽能電池中的應(yīng)用[J];高分子通報(bào);2013年03期
，本文編號(hào)：2466976
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