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Kim, Kihwan,Kim, Juran,Gang, Myeng Gil,Kim, Se-Ho,Song, Soomin,Cho, Yunae,Shin, Donghyeop,Eo, Young-Joo,Jeong, Inyoung,Ahn, Seung Kyu,Cho, Ara,Kim, Jayeong,Yoon, Seokhyun,Choi, Pyuck-Pa,Jo, William,Ki Elsevier 2019 Solar energy materials and solar cells Vol.195 No.-
<P><B>Abstract</B></P> <P>In this work, copper indium gallium selenide (Cu(In,Ga)Se<SUB>2</SUB>; CIGS) absorbers were grown on polyimide (PI)/molybdenum substrates by a three-stage co-evaporation process at various temperatures, film formation was systemically studied using various advanced characterization methods such as transmission electron microscopy, micro-Raman spectroscopy, Kelvin probe force microscopy, and atom probe tomography. The CIGS films on PI were found to exhibit considerable physical and electrical variations with respect to the process temperature of three-stage co-evaporation. In particular, when the process temperature reached 400 °C, the CIGS absorber on PI began to exhibit controlled microstructure and intergrain properties. By adjusting the microstructure and intergrain properties of the absorber films by means of the process temperature of three-stage co-evaporation, flexible CIGS solar cells on PI with an efficiency of 16.7% (with anti-refection coating) were achieved.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CIGS absorber films were grown on flexible polyimide/molybdenum substrates. </LI> <LI> Low-temperature three-stage process (≤440 °C) with extrinsic Na addition was used to CIGS growth. </LI> <LI> CIGS film evolution was systemically observed using advanced material characterization techniques. </LI> <LI> Highly efficient CIGS cells on flexible polyimide substrates were realized while maintaining process manufacturability. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Kim, Juran,Kim, Gee Yeong,Son, Dae-Ho,Yang, Kee-Jeong,Kim, Dae-Hwan,Kang, Jin-Kyu,Jo, William Elsevier 2018 Solar energy materials and solar cells Vol.183 No.-
<P><B>Abstract</B></P> <P>Cu<SUB>2</SUB>ZnSn(S,Se)<SUB>4</SUB> (CZTSSe) thin-film solar cells have been fabricated by various methods. Sputtering is one of the vacuum processes that can be used for the growth of the precursors. In this study, CZTSSe thin-films that were fabricated using metal-precursors and with a high efficiency of 12.3% were examined in a comparison with CZTSSe thin-films that were fabricated using compound-precursors, whose efficiency is 9.1%. Especially, the Kelvin probe force microscopy (KPFM) analysis and local current measurement by conductive atomic force microscopy (c-AFM) show that their local electrical properties indicate completely opposite results. The grain boundaries (GBs) has a downward surface potential bending, and this repelled the minority carriers into the intragrains (IGs) in the sample from the metal-precursors. Therefore, we originally verified the differences between the carrier behaviors and the current flows on the surface.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Using different precursor materials and stacks, Cu<SUB>2</SUB>ZnSn(S,Se)<SUB>4</SUB> thin-film solar cells were fabricated. </LI> <LI> The PCE of the metal-precursor CZTSSe solar cell is 12.3%, while that of compound-precursor's is 9.1%. </LI> <LI> Downward potential bending was observed in the metal-precursor CZTSSe thin-film. </LI> <LI> Surface current was formed on the intra-grains on the metal-precursor CZTSSe thin-film. </LI> <LI> The compound-precursor CZTSSe thin-film indicated inversed results from the metal-precursor one. </LI> </UL> </P>
ASSESSING SUSTAINABLE CUSTOMER VALUE IN FASHION SOCIAL PLATFORMS
Sung Hwan Yeo,Kyung Hoon Kim,Juran Kim 글로벌지식마케팅경영학회 2015 Global Fashion Management Conference Vol.2015 No.06
A fashion social platform is a system that leverages the power of social connectivity to enable individuals to interact, accumulate information and create social values in fashion marketing. Fashion social platform participants, through their collective intelligence, give social platforms essential competence to solve economic and social issues, gather social capital, and create customer value. This study highlights the critical value of fashion social platforms and explains the relationships between knowledge sharing, social capital, and sustainable customer value. They examine (1) the effects of social network properties on knowledge sharing in fashion social platforms, (2) the effects of knowledge sharing on social capital, and (3) the effects of social capital on customer value in fashion social platforms. In the context of social platforms, this study clarifies the concept of customer value, the role of knowledge sharing, and the relationships between social capital and customer value. The study constructs a theoretical model regarding fashion social platforms and sustainable customer value that offers possible implications for fashion marketing practitioners.
SUSTAINABLE MARKETING IN SOCIAL BRAND COMMUNITIES
Juran Kim 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.5
The purpose of this study is to offer conceptual foundations of social brand community by developing an integrated overview of the current research. Concepts from the Structuration theory are used for synthesizing the consumer behavior literature. This study attempts to find and fill the gaps between brand community and social brand community. To fill the gaps in the literature, potential research questions and future research directions are suggested. This study offers foundations to develop a conceptual model of social brand community by considering the basic concepts in the Structuration theory and critical characteristics of the social media environment.
Determinants of Corporate Financial Investment : Evidence from Korea
Juran Kim,Kyojik (Roy) Song 한국재무학회 2020 한국재무학회 학술대회 Vol.2020 No.11
Extending DGHH (2017), we investigate the determinant of risky financial asset holdings of Korean industrial firms. We specifically focus on the difference on the determinants of risky financial assets for Chaebol vs. stand-alone firms, and find that Chaebol firms tend to increase more in risky financial assets as their financial assets grow than stand-alone firms. The standalone firms with low operating performance, low sales growth, high leverage, and short-term debt redemption pressure invest more in risky financial assets to make up for their worse operating performance, while the risky financial assets of Chaebol firms are not related to their operating performance or financial distress. These results are not fully explained by the precautionary motive of cash holdings.
Juran Kim,Michael Capella,Ki Hoon Lee 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.7
Driven by the consumer demand for companies to be socially responsible, companies are increasingly relating their brands to causes and charities in order to accomplish nonprofit objectives and corporate sustainability. In a social marketing campaign, the consumers’ choice of the cause can influence their reactions through the processes of choice. Allowing the consumers to choose the cause may also reinforce their personal role in the donation process, which may result in a better outcome. Further, advertisers are paying increasing attention to the launch of social marketing campaigns via social media, since social media has recently become an essential part of daily life and therefore an imperative venue through which companies connect with consumers. Focusing on the rapidly evolving social media landscape, this study primarily clarifies (1) how choice influences consumers’ perceived interactivity with a social marketing campaign in the social media context, and (2) consumer involvement, as consumers’ individual differences can enhance or limit the effects of a social marketing campaign with choice. Using field experiments, this study investigates the relationships between the consumers’ choice, perceived interactivity, attitude, and purchase intention, and considers the moderating effects of involvement on those relationships. This study’s contributions are that it illuminates (1) the effects of choice on the perceived interactivity of social marketing campaigns in social media contexts, (2) the role of involvement in social marketing campaigns as a moderator, and (3) attitude and purchase intention as outcomes that can facilitate the construction of a theoretical model for social marketing campaigns with choice in the social media context and offer possible implications for advertising practitioners.
INFLUENCES OF INTEGRATION ON INTERACTIVITY OF LUXURY BRAND COMMUNITIES IN THE SOCIAL MEDIA CONTEXT
Juran Kim,Ki Hoon Lee 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7
Luxury brand marketers have recently turned their attention to luxury brand consumers and their social brand communities devoted to the brands. Luxury brands appeal to customers by enhancing their images regarding heritage, quality, and artistic value. Luxury fashion brands also establish social media communities to communicate their images more effectively. This study uses the key concepts of integration and interactivity to provide theoretical foundations to investigate luxury brand communities (LBCs) in the social media context. A survey was given to 252 members of Facebook fan pages for luxury brands from South Korea. This study examines effects of interaction as a process on perceived interactivity of LBCs in social media, and consequences, attitude, purchase intentions, and brand loyalties, hence offering implications for luxury brand management academics and practitioners
OPERATIONAL DEFINITION AND MEASUREMENTS OF SUSTAINABILITY FOR ECO-DESIGN
Juran Kim,Raffaele Donvito 글로벌지식마케팅경영학회 2014 Global Marketing Conference Vol.2014 No.7
The purpose of this study is to identify operational definition and measurements of sustainability for eco-design. The measures of perceived sustainability items enable for eco-design researchers and practitioners to clarify relationships among perceptions of sustainability and other key customer equity variables, such as value equity, brand equity, and relationship equity. The multiple methods for generating scale items and the multiple stages in the scale development process results in a scale that should be useful to both eco-design researchers and practitioners. This study offers a valuable tool for measuring perceived sustainability for eco-design researchers and practitioners from the sustainable marketing perspectives.