International Trends in Solid-State Lighting: Analyses of the Article and Patent Literature.

Boyack, K. W. ; Tasao, J. Y. ; Miksovi, A. ; Huey, M.

Technical Information Center Oak Ridge Tennessee

关键词: Energy conservation;    Solid-state lighting;    Literature review;    Articles;    Patents;   

RP-ID  :  DE2009946572

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We present an analysis of the literature of solid-state lighting, based on a comprehensive dataset of 35,851 English-language articles and 12,420 U.S. patents published or issued during the years 1977-2004 in the foundational knowledge domain of electroluminescent materials and phenomena. The dataset was created using a complex, iteratively developed search string. The records in the dataset were then partitioned according to: whether they are articles or patents, their publication or issue date, their national or continental origin, whether the active electroluminescent material was inorganic or organic, and which of a number of emergent knowledge sub-domains they aggregate into on the basis of bibliographic coupling. From these partitionings, we performed a number of analyses, including: identification of knowledge sub-domains of historical and recent importance, and trends over time of the contributions of various nations and continents to the knowledge domain and its sub-domains.