新穎有機電子元件之研究

本論文的主體分成四個相關的研究，主要是針對有機電子領域內的有機太陽能電池、有機記憶體和有機電晶體這三個有機電子元件進行探討，未來有機會將這些有機電子元件整合在同一個系統上。首先，我們的實驗發現在一個由P3HT和PCBM做為主動層的本體混合異質接面(BHJ)太陽能電池中摻入少量的無機半導體硫化鐵(FeS2)奈米粒子，可以有效的增加有機太陽能電池效率。接著，我們利用金奈米粒子/氧化鋅奈米桿的複合材料摻入於有機絕緣體(PVP)形成一個有機非揮發性記憶體。這個複合材料是金奈米粒子位於中心而氧化鋅奈米桿將它包覆住。由於金奈米粒子被氧化鋅奈米桿包圍住，因此金奈米粒子不會聚集在一起，可以減少漏電的產生。之後，我們提出一個新的有機記憶體元件，其機制主要是利用N型半導體奈米粒子硫化鐵(FeS2)埋藏於P型有機半導體材料P3HT中，產生第二類型的能帶對準，藉此能夠儲存電子，進而產生電流雙穩態效應。最後，我們利用一種新合成的有機材料poly(N-(4-(9,9-dioctyl-fluoren-2-yl)phenyl)-N,N',N'-triphenyl-l,4-phenylenediamine) (P1)製作有機電晶體，元件的載子移動率是0.95x10-2 cm2/Vs 而電流開關比是5.8 x10 4倍，但是這個新材料具有一個特別的優點也就是大的能隙值(2.84eV)，因為這個新材料P1可以同時具有電晶體特性而且有高透光性，日後有機會可以做為有機透明電晶體的應用。

關鍵字

Organic ； solar cell ； bi-stable memory ； transistor

並列摘要

This thesis consists of four related studies that primarily focus on the field of organic electronics, including devices such as organic solar cells, organic memories, and organic transistors. Our study provides potential areas for future research on integrating optoelectronic devices based on conjugated polymers. In this thesis, we have demonstrated that the efficiency of bulk-heterojunction (BHJ) solar cells can be enhanced by incorporating a small amount of semiconductor FeS2 nanocrystals (NCs) into poly-3(hexylthiophene) (P3HT)- and phenyl-C61-butyric acid methyl ester (PCBM)-based active layers. Such incorporation of inorganic nanoparticles represents a simple approach to increase the efficiency of organic solar cells. Organic non-volatile memory devices were fabricated by embedding a composite of Au nanoparticles (NPs)/ZnO nanorods (NRs) in an insulating active layer. The surrounding ZnO NRs act as spacers which can effectively prevent the central Au NPs from aggregation. Consequently, low current leakages can be expected. We have proposed a novel organic non-volatile memory device based on n-type FeS2 NCs embedded in a p-type polymer P3HT matrix. This device has a type-II band alignment, stores injected electrons, and exhibits electrical bi-stable characteristics. We have fabricated organic thin-film transistors (OTFTs) by utilizing a novel wide bandgap conjugated polymer poly(N-(4-(9,9-dioctyl-fluoren-2-yl)phenyl)-N,N',N'- triphenyl-l,4-phenylenediamine) (Pl). The carrier mobility was 0.95×10-2 cm2/Vs and the on/off current ratio was approximately 5.8×104. Moreover, the thin film of P1 exhibits very high transparency for visible light since its bandgap is 2.84 eV, and it can potentially function as a superior material for transparent organic electronics.

並列關鍵字

有機；太陽能；雙穩態記憶體；電晶體

參考文獻

[4] Hagen Klauk, Chem. Soc. Rev., 2010, 2643-2666.

Peter Peumans, Appl. Phys. Lett., 2008, 263302-263304.

Sekitani, Hiroshi Kawaguchi, IEEE Trans. on Elec. Dev., 2005, 2502-2511.

[8] Shin Woo Jeong, Jin Wook Jeong, Seongpil Chang, Seung You Kang, Kyoung Ik Cho, and Byeong Kwon Ju, Appl. Phys. Lett. 2010, 253309 – 253311.

Müller-Meskamp, and Karl Leo. Adv. Funct. Mater. 2011, 1076-1081.

國際替代計量

新穎有機電子元件之研究

主題瀏覽