本文選題：銀納米線 + 銀網(wǎng)格　； 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：透明導(dǎo)電電極在有機(jī)光電子器件的發(fā)展中起著非常重要的作用,比如有機(jī)電致發(fā)光器件(Organic Light Emitting Diode,OLED)、有機(jī)光伏電池(Organic Photovoltaic Cell,OPVC)等。同時(shí)柔性透明導(dǎo)電電極的發(fā)展也推動(dòng)著以可穿戴設(shè)備為首的下一代柔性顯示技術(shù)的發(fā)展。在透明導(dǎo)電電極的性能表征中,透過(guò)率和電導(dǎo)率是所有衡量透明導(dǎo)電電極的性能參數(shù)中兩個(gè)最重要的參數(shù)。氧化銦錫(Indium Tin Oxide,ITO)電極為現(xiàn)在應(yīng)用最廣泛的透明導(dǎo)電電極,但是由于銦材料的短缺以及ITO電極制備成本過(guò)高,現(xiàn)在越來(lái)越多的研究者著手尋找一種合適的ITO替代材料。銀納米線在有機(jī)柔性光電子的應(yīng)用中因?yàn)槠鋬?yōu)良的電學(xué)、光學(xué)和機(jī)械性能被當(dāng)作最有前景的ITO電極材料的替代材料之一。銀納米線在應(yīng)用中顯示出了高透過(guò)率、高導(dǎo)電率和優(yōu)良的機(jī)械性能。但是,銀納米松散的特性以及由于銀納米線之間的空隙導(dǎo)致的絕緣性阻礙了銀納米線性能的進(jìn)一步提高。因此本文提出在銀納米線上混合金屬網(wǎng)格結(jié)構(gòu)來(lái)提高銀納米線薄膜的導(dǎo)電性并允許近100%的光傳輸通過(guò)網(wǎng)格中的“漏洞”。本文通過(guò)噴墨打印技術(shù)打印銀網(wǎng)格然后結(jié)合銀納米線薄膜來(lái)制作混合透明導(dǎo)電電極。通過(guò)噴墨打印的銀網(wǎng)格連接了銀納米線之間的空隙提高了整個(gè)混合電極的導(dǎo)電性,同時(shí)銀網(wǎng)格固化了松散的銀納米線,加強(qiáng)了納米線與納米線之間的連接,提高了整個(gè)銀納米線薄膜的機(jī)械穩(wěn)定性。這樣使得銀納米線薄膜從硅片上剝離得更加完全從而使混合電極得到一個(gè)更加平整的表面。該打印的銀網(wǎng)格和銀納米線混合電極的方塊電阻低至22.5Ω/□,同時(shí)透過(guò)率達(dá)到了87.5%。這個(gè)特性相較于單獨(dú)銀納米線電極45.7Ω/□的方塊電阻有了很大提高,同時(shí)與玻璃ITO電極20Ω/□的方塊電阻和89%的透過(guò)率也非常接近。此外,該電極利用了旋涂和剝離光交聯(lián)聚合物的方法制備柔性襯底,因此具有非常優(yōu)良的機(jī)械性能和表面平整性。我們還通過(guò)將此混合透明導(dǎo)電電極用來(lái)作為有機(jī)發(fā)光器件的陽(yáng)極來(lái)測(cè)試該電極的實(shí)用性。該OLED器件的亮度最高達(dá)到10000cd/m2,同時(shí)電流效率最高達(dá)到了12 cd/A,另外該器件還表現(xiàn)出了非常優(yōu)良的柔性特點(diǎn),該柔性發(fā)光器件在彎曲測(cè)試半徑達(dá)到2mm的情況下依然能夠保持非常穩(wěn)定電學(xué)特性和光學(xué)特性。最后我們得出結(jié)論Ag-grid/AgNW混合電極制備的柔性器件的優(yōu)良性能充分體現(xiàn)了利用噴墨打印銀納米粒子結(jié)合銀納米線制成的混合透明電極能夠應(yīng)用于高質(zhì)量的有機(jī)光電子器件的制備。
[Abstract]:Transparent conductive electrodes play an important role in the development of organic photoelectron devices, such as organic Light Emitting devices, organic Photovoltaic cells, organic photovoltaic cells, and so on.At the same time, the development of flexible transparent conductive electrodes also promotes the development of the next generation flexible display technology, led by wearable devices.In the performance characterization of transparent conductive electrode, transmittance and conductivity are the two most important parameters to measure the performance of transparent conductive electrode.Indium tin oxide (Indium Tin oxide) electrode is the most widely used transparent conductive electrode. However, due to the shortage of indium material and the high cost of preparing ITO electrode, more and more researchers are looking for a suitable alternative material for ITO.Silver nanowires are considered as one of the most promising ITO electrode materials for their excellent electrical, optical and mechanical properties in the application of organic flexible photoelectron.Silver nanowires show high transmittance, high conductivity and excellent mechanical properties.However, the loose properties of silver nanowires and the insulation caused by the gap between silver nanowires hinder the further improvement of silver nanowires.Therefore, a new method is proposed to improve the electrical conductivity of silver nanowire films by mixing metal mesh structures on silver nanowires and to allow nearly 100% of optical transmission through the "holes" in the grid.In this paper, the silver grid is printed by inkjet printing technique, and then the silver nanowire film is combined to fabricate the mixed transparent conductive electrode.The gap between the silver nanowires is connected by inkjet printing, and the conductivity of the mixed electrode is improved. Meanwhile, the silver mesh solidifies the loose silver nanowires, which strengthens the connection between the nanowires and nanowires.The mechanical stability of the whole silver nanowire film is improved.This allows the silver nanowire film to be stripped more completely from the silicon wafer, resulting in a smoother surface for the mixed electrode.The printed silver grid and silver nanowire hybrid electrode have a square resistance as low as 22.5 惟 /-and a transmittance of 87.5%.This property is much better than the 45.7 惟 /-block resistance of the silver nanowire electrode alone, and is very close to the glass ITO electrode's 20 惟 /-square resistance and 89% transmittance.In addition, the electrode has excellent mechanical properties and surface smoothness due to the preparation of flexible substrates by spin-coating and peeling of photocrosslinked polymers.We also tested the practicability of the hybrid transparent conductive electrode by using it as an anode for organic luminescent devices.The brightness of the OLED device is up to 10000cdr / m2, and the current efficiency is up to 12cd/ m2.In addition, the device also shows excellent flexibility.The flexible luminescent device can maintain very stable electrical and optical properties even when the bending radius reaches 2mm.Finally, we conclude that the excellent performance of flexible devices fabricated with Ag-grid/AgNW hybrid electrode fully shows that the hybrid transparent electrode made of inkjet printing silver nanoparticles combined with silver nanowires can be used in the preparation of high quality organic optoelectronic devices.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TN383.1

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