Hoonbong Lee
LG Electronics
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Featured researches published by Hoonbong Lee.
photovoltaic specialists conference | 2011
Sun Ho Kim; Hyo-Jae Lee; Wooyoung Kim; Jongseok Park; Jin-Won Chung; Seh-Won Ahn; Hoonbong Lee
In this paper, a series of microcrystalline silicon (μc-Si:H) solar cells were fabricated on different back reflectors by very high frequency plasma enhanced chemical vapor deposition (VHF-PECVD). The results indicated that the performance of μc-Si:H solar cells strongly depended on their back reflector structures. First of all, the various Al:ZnO films with different optical and electrical properties were fabricated, and the effects on the performance of μc-Si:H solar cells as the back reflector materials were investigated. Unlike the previous studies for a-Si:H solar cells, all the μc-Si:H cells with various Al:ZnO back reflectors are showing similar I-V characteristics. However, it was interesting result that the back reflector with highest resistivity, fabricated by oxygen reactive sputtering, showed the best fill factor. As the next step, the n-μc-SiO layer with high resistivity was introduced as the new back reflector materials substituting for the conventional Al:ZnO. The optimal deposition condition for the n-μc-SiO layer was selected considering the low refractive index under 1.85, the reasonable electrical resistivity around 1E+3 Ω·cm and low absorption spectra near IR region. For the new back reflector structures, all the cell parameters were increased drastically at n-μc-SiO thicker than 300 nm, and a conversion efficiency of as high as 9.3 % (Voc: 0.501 V, Jsc: 27.4 mA/cm2, F.F: 0.68) was obtained. The performance gain for Voc and F.F was more obvious in the thicker back reflectors, suggesting that the high-resistivity n-μc-SiO layer could reduce the shunt current at the back contacts of μc-Si:H cells.
Archive | 2010
Koon-Seok Lee; Hoonbong Lee; Yaunghwan Kim
Archive | 2013
Minkyeong Lee; Hoonbong Lee; Hamin Song
Archive | 2011
Junho Ahn; Yanghwan Kim; Hoonbong Lee; Koon-Seok Lee; Minchel Kim; Jinseung Park; Pyeongwon Park; Yonghwan Bae; Jinhwan Son; Wonkyo Jung
Archive | 2010
Koon-Seok Lee; Junho Ahn; Hoonbong Lee; Yanghwan Kim
Archive | 2011
Wonchul Jeong; Yanghwan Kim; Donghun Youn; Koon-Seok Lee; Junho Ahn; Hoonbong Lee
Archive | 2011
Junho Ahn; Yanghwan Kim; Hoonbong Lee; Koon-Seok Lee; Jinhwan Son; BoYoung Seo; Hansu Jung
Archive | 2011
Junho Ahn; Daegeun Seo; Dal-Ho Cheong; Bongmun Jang; Yanghwan Kim; Hoonbong Lee; Koon-Seok Lee; Daeho Kang; Kyungyong Park; Moonseok Seo; Changwoo Son; Sungyoung Lee; Wook-Jin Lee; Yongwoon Jang; Moonsuk Choi; Jinwook Han; Hyejin Hwang
Archive | 2015
Minho Jang; Hoonbong Lee; Hansu Jung
Archive | 2013
Bosun Chung; Yongwoon Jang; Hoonbong Lee