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이행근 ( Hang Ken Lee ),송창은 ( Chang Eun Song ),이상규 ( Sang Kyu Lee ),이종철 ( Jong-cheol Lee ),신원석 ( Won Suk Shin ) 한국공업화학회 2017 공업화학전망 Vol.20 No.2
차세대 신재생 에너지로서 유기태양전지는 최근 신규 소재 및 소자 기술의 개발에 힘입어 비약적인 발전을 이루고 있다. 본 고에서는 용액형 고분자 및 저분자 도너 및 비플러렌계 억셉터 소재, 소자 구조 최적화를 위한 다양한 소자 기술을 포함한 기술 동향과 이에 기반한 국내외 업체 동향을 함께 소개하고자 한다.
( Sungmin Ryu ),( Ken Hung ),( Jafar Mana ) 서암순창장학회 2014 Journal of Marketing Thought Vol.1 No.1
One concern expressed by manufacturers in relation to their suppliers is the protection of their interest in the event of a breach of benevolence. As the supplier is not under the direct control of the manufacturer, benevolence is a characteristic of the manufacturer’s vulnerability. In this paper we examined certain types of interfirm control mechanisms (i.e., vertical control or the norm of flexibility) that a manufacturer is more likely to rely on to reduce risk. Empirical results based on 137 manufacturers indicate that manufacturers attempt to reduce risk by depending on vertical control, the norm of flexibility or the simultaneous use of both as control mechanisms.
Hyun, Woo Jin,Lee, Hang Ken,Im, Sang Hyuk,Park, O Ok American Scientific Publishers 2014 Journal of Nanoscience and Nanotechnology Vol.14 No.11
<P>We have demonstrated the preparation of an ordered hole pattern via a simple colloidal assembly technique and a sol-gel process without the use of any special equipment to enhance light extraction from polymer light-emitting diodes (LEDs). From two-dimensional (2D) polystyrene (PS) colloidal crystals, 2D TiO2 honeycomb structures were easily obtained after depositing TiO(x) sol solution onto the colloidal crystals by a doctor blade technique and removing the PS colloidal particles. In order to optimize the thickness of the deposited TiO(x) materials for fabricating 2D TiO2 honeycomb structures, the concentration of the TiO(x) sol solution was controlled. By applying the 2D TiO2 honeycomb structure on the backside of the glass substrate, the efficiency of a polymer LED, compared to the device without the structure, was increased without a significant change in the electroluminescence spectrum. This enhancement is attributed to the improved light extraction, which is due to the suppression of total internal reflection at the interface between the glass substrate and the air.</P>
Dye-sensitized solar cells with Pt- and TCO-free counter electrodes
Lee, Kun Seok,Lee, Hang Ken,Wang, Dong Hwan,Park, Nam-Gyu,Lee, Jun Young,Park, O Ok,Park, Jong Hyeok Royal Society of Chemistry 2010 Chemical communications Vol.46 No.25
<P>Here for the first time, we demonstrate novel DSSCs with a Pt- and TCO-free counter electrode, which have a highly conductive polymer exhibiting high catalytic ability and charge transport, and the photovoltaic performance increases as we increase the PEDOT film conductivity.</P> <P>Graphic Abstract</P><P>Here for the first time, we demonstrate novel DSSCs with a Pt- and TCO-free counter electrode, which have a highly conductive polymer exhibiting high catalytic ability and charge transport. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0cc00432d'> </P>
Jin Hyun, Woo,Ken Lee, Hang,Soon Oh, Sang,Hess, Ortwin,Choi, Choon‐,Gi,Hyuk Im, Sang,Park, O Ok WILEY‐VCH Verlag 2011 Advanced Materials Vol.23 No.16
<P><B>Two‐dimensional TiO<SUB>2</SUB> inverse opal structures with a thin, flat‐top surface</B> are fabricated and inserted between the glass substrate and the anode electrode of solution‐processed polymer light‐emitting diodes. It is demonstrated that the proposed inverse opal structure acts as a 2D photonic crystal, achieving a significant enhancement in the light extraction from the electroluminescent devices. </P>