本文選題：乙炔基 + 1��； 參考：《聊城大學》2017年碩士論文

【摘要】：有機場效應晶體管(OFETs)具有柔性、質輕和可大面積制備等優(yōu)點,使其在有機電子領域具有廣泛的應用前景。有機半導體材料作為OFETs的活性層,起著載流子傳輸的作用。材料分子及分子聚集態(tài)結構決定器件的操作/空氣穩(wěn)定性和載流子遷移率的大小。因此,設計合成高性能的新型有機半導體材料具有重要意義。萘二酰亞胺(NDIs)是一類重要的電子受體,該類材料往往通過選擇不同的給體單元,來實現對目標分子的HOMO/LUMO能級、帶隙以及載流子傳輸特性的調控。因此本文設計合成了一系列基于萘二酰亞胺的炔烴共聚物,并研究其相關的物理化學性質以及結構與性能關系。論文主要包括以下兩個部分:1.通過選擇1,2,5,6-萘二酰亞胺(Iso-NDI)作為受體,設計合成了一系列基于Iso-NDI的π-共軛炔烴聚合物P1,P2和P3,其連接的單元分別為苯并噻二唑、苯和1,4-雙十二烷氧鏈-苯。我們研究了三種聚合物的熱力學、光學、電化學及載流子傳輸特性。研究結果表明,三種聚合物無論是在溶液狀態(tài)下還是在薄膜狀態(tài)下,均可觀測到發(fā)射熒光現象。三種聚合物的光學帶隙(2.02~2.25 eV)均小于聚乙炔的帶隙(~2.5eV)。P1,P2和P3的LUMO能級相近約為-3.5 eV,P1和P3的HOMO能級相對于P2的HOMO能級分別提高了0.11和0.21 eV.我們制備了基于這三種聚合物的底柵頂接觸的OFETs器件,以研究其載流子傳輸特性。聚合物P1和P2均表現為以電子傳輸為主的n-型半導體行為且電子遷移率高達10-3 cm2 v-1 s-1,聚合物P3則表現為以空穴傳輸為主的p-型半導體行為。聚合物P1和P2是首次報道的兩例基于Iso-NDI的n-型有機半導體材料。上述結果表明,基于1,2,5,6-NDI的炔烴共聚物通過選擇不同的連接單元可以調控相應的能級和載流子的傳輸行為。2.通過選擇具有結構異構的1,4,5,8-NDI和1,2,5,6-NDI單元分別作為受體,二苯并磷雜環(huán)戊二烯類單元作為給體,合成了兩種主鏈含磷原子的π-共軛炔烴聚合物P4和P5。我們研究了兩種聚合物的物理化學性質,發(fā)現二者的光學和電化學性質有著顯著的不同。兩種聚合物的紫外吸收光譜呈現互補特性。無論是在溶液狀態(tài)下還是薄膜狀態(tài)下,P4的熒光強度比較微弱而P5的熒光強度則較強。通過雙光子熒光光譜可知,P5還具有二階非線性光學特性。我們制備了基于這兩種聚合物的底柵頂接觸的OFETs器件,以研究其載流子傳輸特性�；赑4的OFETs表現為以電子傳輸為主的n-型半導體行為,遺憾的是基于P5的OFETs并未檢測出FET信號。
[Abstract]:With the advantages of flexibility, light weight and large area preparation, OFETs have a wide application prospect in the field of organic electronics. As the active layer of OFETs, organic semiconductors play the role of carrier transport. The structure of molecular and molecular aggregates determines the operating / air stability and carrier mobility of the device. Therefore, it is of great significance to design and synthesize new organic semiconductor materials with high performance. Naphthalenediimide (Ndis) is a kind of important electron acceptor. This kind of material can control the HOMO/LUMO energy level, band gap and carrier transport characteristics of the target molecule by selecting different donor units. In this paper, a series of naphthalenediimide based copolymers of alkynes were designed and synthesized, and their physical and chemical properties and relationship between structure and properties were studied. The thesis includes two parts as follows: 1: 1. A series of 蟺 -conjugated alkynes based on Iso-NDI have been designed and synthesized by selecting Iso-NDI as the receptor. The connecting units are benzothiadiazole, benzene and 1-didodecane oxy-benzene, respectively. We have studied the thermodynamic, optical, electrochemical and carrier transport properties of three polymers. The results show that the emission fluorescence can be observed in the solution state and the thin film state of the three polymers. The optical band gap of the three polymers (2.02 ~ 2.25 EV) is smaller than the band gap of polyacetylene (2.5 EV). The LUMO energy levels of P2 and P3 are similar to those of P3. The HOMO energy levels of P1 and P3 are increased by 0.11 and 0.21 EV, respectively, compared with the HOMO level of P2. We have fabricated the bottom gate top contact OFETs devices based on these three polymers to study their carrier transport characteristics. Both P _ 1 and P _ 2 exhibit n-type semiconductor behavior dominated by electron transport, and the electron mobility is as high as 10-3 cm2 v-1 s-1.The polymer P3 exhibits p-type semiconductor behavior dominated by hole transport. Polymers P1 and P2 are two examples of Iso-NDI-based organic semiconductor materials reported for the first time. The above results show that the alkynes copolymer based on 1H _ 2O _ 5N _ (DI) can regulate the transport behavior of the corresponding energy levels and carriers by selecting different connecting units. Two kinds of 蟺 -conjugated alkyne polymers, P4 and P5, were synthesized by selecting the structural isomerization units of 1H4 (58-NDI) and 1O2H5 (6-NDI) units as receptors and dibenzophosphorus heterocyclopentadiene units as donors, respectively. The two kinds of 蟺 -conjugated alkynes containing phosphorous atoms in the main chain, P4 and P5, were synthesized. We have studied the physical and chemical properties of the two polymers and found that their optical and electrochemical properties are significantly different. The UV absorption spectra of the two polymers are complementary. The fluorescence intensity of P4 is weaker than that of P5 in solution or thin film. The two-photon fluorescence spectra show that P5 also has second-order nonlinear optical properties. We have fabricated the bottom gate top contact OFETs devices based on these two polymers to study their carrier transport characteristics. OFETs based on P4 exhibits n- type semiconductor behavior dominated by electronic transmission. Unfortunately, OFETs based on P5 does not detect FET signals.
【學位授予單位】：聊城大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O631

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本文編號：1925710