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Nd-Doped SnO<sub>2</sub> and ZnO for Application in Cu(InGa)Se<sub>2</sub> Solar Cells
Park, Hyeonwook,Alhammadi, Salh,Bouras, Karima,Schmerber, Guy,Ferblantier, Gé,rald,Dinia, Aziz,Slaoui, Abdelilah,Jeon, Chan-Wook,Park, Chinho,Kim, Woo Kyoung American Scientific Publishers 2017 Science Of Advanced Materials Vol.9 No.12
오버레이 멀티캐스트 기반의 IPTV 요구사항을 고려한 트리 가입 메카니즘
고현욱(HyeonWook Ko),박현규(HyunGyu Park),임경식(KyungShik Lim),박주영(JuYoung Park) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11
This paper suggests tree join mechanism for satisying IPTV delay requirement and parent node select information by end to end delay. End to end delay is measured by summation of hop delay and queuing delay. And this mechanism estimate a permissible amount of child node for minimizing by checking.
양면수광형 실리콘 태양광 모듈의 바닥면 반사조건 변화에 따른 발전성능 평가
박도현(Dohyun Park),김민수(Minsu Kim),소원섭(Wonshoup So),오수영(Soo-Young Oh),박현욱(Hyeonwook Park),장성호(Sungho Jang),박상환(Sang-Hwan Park),김우경(Woo Kyoung Kim) 한국태양광발전학회 2018 Current Photovoltaic Research Vol.6 No.2
Multi-wire busbar-type bifacial n-type Si solar cells have been used for the fabrication of monofacial and bifacial photovoltaic (PV) module, where bifacial module was equipped with transparent backsheet while monofacial module was prepared using white backsheet. The comparison of six-day accumulated power production obtained from outdoor test under gray cement ground conditions using 60cell monofacial and bifacial PV modules suggested the bifacial gain of over 20% could be achieved. Furthermore, the outdoor evaluation tests of bifacial modules with different ground conditions such as cement (reference), green paint, white paint and green artificial grass, were performed. It turned out white paint showed the best albedo and thus the highest power production, while green paint and artificial grass showed less power generation than cement ground.
Alhammadi, Salh,Jung, Hyunmin,Kwon, Sunmo,Park, Hyeonwook,Shim, Jae-Jin,Cho, Moo Hwan,Lee, Moonyong,Kim, Jong Su,Kim, Woo Kyoung Elsevier 2018 THIN SOLID FILMS - Vol.660 No.-
<P><B>Abstract</B></P> <P>The effect of Gallium (Ga) doping on CdS thin film properties and the performance of the corresponding Cu(InGa)Se<SUB>2</SUB>/CdS heterojunction solar cell has been investigated. The CdS thin films were deposited using a conventional chemical bath deposition (CBD) process. For a source of Ga dopant, a gallium nitrate (Ga(NO<SUB>3</SUB>)<SUB>3</SUB>) aqueous solution with Ga concentration from 5×10<SUP>−4</SUP> to 2×10<SUP>−3</SUP> M has been used. Ga doping was carried out by adding gallium nitrate aqueous solution directly to the main CBD solution that contained all the other reactants (i.e., Cd<SUP>2+</SUP>, S<SUP>2−</SUP>, and NH<SUB>3</SUB>). It was found that Ga doping is effective for improving the optical transmittance of CdS films and, thus, increasing the photoelectric current density of the films and the short-circuit current density (J<SUB>SC</SUB>) of CIGS cells. With the use of a Ga-doped CdS buffer layer, the photovoltaic performance of CIGS cells was improved, primarily because of enhanced J<SUB>SC</SUB> and fill factor.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ga doping of CdS was carried out by chemical bath deposition solution. </LI> <LI> Ga doping improved the optical transmittance and photoelectric current of CdS film. </LI> <LI> CdS:Ga buffer layer enhanced the J<SUB>SC</SUB> and fill factor of Cu(InGa)Se<SUB>2</SUB> cell. </LI> </UL> </P>