石墨烯(Graphene)被視為很可能改變未來世界的神奇材料，它是一種由碳原子以sp2雜化軌道組成呈六角形蜂巢晶格結構的二維平面薄膜材料，由於具有良好的導電性與透光性，以及輕薄、堅韌、可撓性等優點，在光電應用方面，潛力無窮且前景極為看好。近年來石墨烯光電應用方面的技術發展快速且廣泛，然而，有系統且完整的介紹有關石墨烯光電應用研究與發展架構的文獻鮮少，大部分以非系統性方式從技術面探討其科技內涵。
本研究乃將石墨烯光電應用相關文獻之引文透過一套有規則的主路徑分析法進行分析，所得之結果有別於回顧性研究的結果，主路徑分析法較不會有遺漏且可以得到系統性及量化的資訊。首先透過WOS資料庫檢索石墨烯光電應用方面之研究文獻，建構一個引文網路，再使用主路徑分析法計算文獻間引證連結的強度，形成主要發展路徑，以找出石墨烯光電應用領域研究中重要且較具影響力之文獻，用以理出該學科領域的主要發展脈絡及知識擴散路徑，並藉以了解石墨烯光電應用領域研究的重要議題及未來可能的發展動向。本研究也使用g-index及h-index找出此領域中具影響力的重要學者及學術期刊。
本研究以逐步主路徑、總體主路徑及關鍵延伸主路徑三種主路徑方法分析1233篇相關論文，結果篩選出重要且較具影響力之文獻，研究發現：
1.主路徑分析法可以全面地鳥瞰石墨烯光電應用技術的發展過程及其重要趨勢，並顯示支領域的分合情況，並可把複雜的引用網路簡化，顯示一連串重要研發項目的發展順序，呈現知識的傳承、累積及其前後影響關係。
2.自2006年至2012年，石墨烯光電應用研究之發展情況大致可分為兩個階段，第一個階段(2006年至2008年)屬於早期基礎研究，較偏重於石墨烯材料的製備合成及材料性質之研究；第二個階段(2009年至2012年)除了探討製備方式外，也兼顧光電應用方面的研究。
3.第二個階段的研究論文形成三條路徑，而依論文之性質可分為化學氣相沈積法製備方式(CVD)、還原石墨烯氧化物法(rGO)製備方式及雷射裝置應用(laser devices)三個重要群組。
4.2010年後，石墨烯光電應用產品(device fabrication)之研究紛紛出現，主要著重於透明薄膜或透明電極的研製。
5.在石墨烯光電應用研究領域的主要研究團隊包括Ruoff、Nguyen 、Zhang、Kamat、Colombo、Popa 、Hong 、Coleman、Huang、Zhi及Loh等團隊。資料顯示，此領域的研究發展除了美國及英國等科技大國之外，亞洲國家中，新加坡與中國的實力也很強，南韓的表現也不容忽視。

Considered as the “Miracle Material” that could change the world, graphene was the first two-dimensional material to be discovered. Due to its excellent conductivity, transparency, thinness, toughness, and flexibility, graphene has become a very useful material in optoelectronics applications. In recent years, research and development (R&D) on graphene for optoelectronics applications has made rapid progress on an extensive scale. However, there is not much research literature providing a systematic and comprehensive introduction of the development of graphene applications in the optoelectronics field. Most general reviews of the literature explore its technological content simply through a non-systematic perspective.
By analyzing the literature citations by using a set of rules from the main path analysis, this study obtains results that are different from the method of the review literature. The main path analysis method can get rid of missing information and also find systematic and quantitative information. First, through the WOS database retrieval of the research literature on graphene applications for optoelectronics, a citation network is set up. Second, the strength between the literature-cited linkages by applying the main path analysis method is calculated. Finally, the main development path is formed in order to discover the important and influential literature in the field of graphene applications for optoelectronics. Furthermore, this study maps major developments in the context of the subject and knowledge diffusion paths so as to identify the important research topics and their possible future developments. The g-index and h-index are also used in this study as tools to see the influential scholars and academic journals in this field.
This study uses the local main path, global main path, and key-route main path as the three methods to analyze a total of 1233 papers and to filter out the important and influential literature. The findings are as follows.
1. The main path analysis method provides a full bird’s eye view of the technological development of graphene applications for optoelectronics and the important trends. It also shows the division and unification of each sub-area, simplifies any complicated reference network, and indicates the series (in order) of important R&D projects, thus presenting the transfer, accumulation, and sequential relationship of knowledge.
2. From 2006 to 2012, the R&D of graphene applications for optoelectronics can be divided into 2 stages: the first stage (2006-2008) belongs to the early basic research period, with an emphasis on graphene preparation and material properties; the second stage (2009-2012) is when researchers devoted efforst to exploring not only its preparation, but also its applications.
3. During the second stage, research papers were found to form three paths. In terms of methodology, they are classified as 3 groups: CVD, rGO, and laser devices.
4. Since 2009, research studies about graphene applications, such as device fabrication, have been emerging continuously, mainly focusing on transparent film or transparent electrodes.
5. In the field of graphene applications for optoelectronics, the important research teams include Ruoff, Nguyen, Zhang, Popa, Hong, Kamat, Colombo, Zhi, Loh, Huang, and Coleman. As shown in the data, those countries taking the lead in graphene R&D are the United States and the United Kingdom. Aside from these two leaders, Singapore and China are strong in this field, and South Korea is also doing very well.

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