本文選題：非富勒烯　切入點：共軛聚和物　出處：《遼寧大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：有機太陽能電池是光電轉(zhuǎn)換的重要運用之一,它具有制造成本低、質(zhì)量輕和可以卷對卷生產(chǎn)等特征。實現(xiàn)電池高能量轉(zhuǎn)換效率及穩(wěn)定性是科研工作者-直研究的重點。本論文的研究主要圍繞新型給受體材料的開發(fā)和器件穩(wěn)定性結(jié)構(gòu)的探索展開,研究了分子結(jié)構(gòu)、器件參數(shù)、遷移率和微觀形貌等方面的影響與相互關(guān)系,并同時對疊層串聯(lián)電池的中間層進(jìn)行探索,制備了傳統(tǒng)結(jié)構(gòu)和倒置結(jié)構(gòu)的串聯(lián)疊層電池。主要工作分為三個方面：第一,以PDIs為基本單元和DACH為橋鏈,設(shè)計、合成和表征一系列小分子受體材料。通過理論計算表明,DACH橋鏈的引入使得PPDI形成U型的分子骨架,有助于PDIs之間的π-π相互作用。我們將其制備成空氣穩(wěn)定性較好的倒置器件,本體異質(zhì)結(jié)由外消旋體和光學(xué)純的DACH-PPDIs小分子作為電子受體材料和PTB7-Th作為電子給體材料共混而成,并同時對該系列的電池進(jìn)行微觀形貌、遷移率、電子傳輸性質(zhì)等進(jìn)行表征。結(jié)果表明不同結(jié)構(gòu)和烷基鏈長度對器件性能有一定的影響,且最高效率可以達(dá)到4.68%。這就為進(jìn)一步設(shè)計非富勒烯受體材料提供了一定的理論思路。第二,以共軛聚合物給體材料概念出發(fā),設(shè)計合成新型高遷移率的共聚物材料,IDT-T1和IDTT-T1;并與PC70BM為受體制備成傳統(tǒng)結(jié)構(gòu)太陽能電池,使得總體器件效率超過了6%。還研究該兩組給體聚合物中延長了共軛鏈骨架后對器件性能的影響。結(jié)果表明,分子骨架的延長有利于聚合物空穴遷移率的提升,從而在器件中有較高的JSC,而且能夠降低其HOMO能級,使得器件的Voc超過了0.9 V。為將來設(shè)計疊層以及多層電池提供了一個良好的適用條件。第三,合成和表征中間層電子傳輸層材料,納米氧化鋅(Nano-ZnO);并以寬帶隙材料P3HT:1CBA為底層、IDTT-T1:PC7OBM為頂層制備了串聯(lián)疊層電池,探索了不同中間層制備方法對電池效率的影響。研究結(jié)果表明使用Nano-ZnO、PE1和PEDOT:PSS (4083)制備而成的中間層能有效的促進(jìn)電子空穴復(fù)合,最終在倒置結(jié)構(gòu)中的最高的器件性能能超過7%。
[Abstract]:Organic solar cells are one of the important applications of photovoltaic conversion. The characteristics of light weight and rewinding can be produced. The realization of high energy conversion efficiency and stability of batteries is the focus of the research-direct research. The research in this thesis is mainly focused on the development of new recipient materials and the stability of devices. The exploration of structure, The effects and relationships of molecular structure, device parameters, mobility and microcosmic morphology are studied, and the interlayer of the stack series battery is also explored. A series stacked battery with traditional structure and inverted structure is fabricated. The main work is divided into three aspects: first, the design takes PDIs as the basic unit and DACH as the bridge chain. A series of small molecular receptor materials were synthesized and characterized. The theoretical calculation shows that the introduction of the bridge chain of PPDI leads to the formation of U-shaped molecular skeleton, which is helpful to the 蟺-蟺 interaction between PDIs. The bulk heterojunction is composed of racemes and optically pure DACH-PPDIs small molecules as electron acceptor materials and PTB7-Th as electron donor materials. The results show that different structure and length of alkyl chain have a certain influence on the performance of the device. The maximum efficiency can reach 4.68. This provides a theoretical idea for the further design of non-fullerene receptor materials. Secondly, based on the concept of conjugated polymer donor material, A new type of copolymers with high mobility, IDT-T1 and IDTT-T1, were designed and synthesized. Conventional solar cells were prepared with PC70BM as the receptor. The effect of the conjugated chain skeleton on the device performance is also studied. The results show that the prolongation of the molecular skeleton is beneficial to the enhancement of the hole mobility of the polymer. Therefore, there are higher JSCs in the device, and the HOMO energy level can be reduced, and the Voc of the device exceeds 0.9 V. it provides a good suitable condition for the design of stacked and multilayer batteries in the future. Nanocrystalline zinc oxide (ZnO) nanocrystalline oxide was synthesized and characterized as the interlayer electron transport layer material, and a series stacked battery was prepared by using the broadband gap material P3HT: 1CBA as the bottom layer and IDTT-T1: PC7OBM as the top layer. The effect of different interlayer preparation methods on the efficiency of the battery was explored. The results show that the intermediate layer prepared by Nano-ZnOOPE1 and PEDOT:PSS 4083) can effectively promote the electron hole recombination, and the highest device performance in the inverted structure can exceed 7 layers.
【學(xué)位授予單位】：遼寧大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TM914.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 Yongfang Li;;Over 10% efficiencies achieved for the PSCs with thick active layer based on D-A copolymer donors and various fullerene acceptors[J];Science China Chemistry;2015年02期

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本文編號：1617367