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한창준(Han, Chang-Jun),김성훈(Kim, Sung-Hun),박계춘(Park, Gye-Choon),장봉석(Jang, Bongseog) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
본 기술개발은 기존 태양추적기의 구조를 크게 변화시킬 수 있는 무선망 활용 태양추적기 개발에 관한 내용이다. 기존의 태양추적기는 태양광어레이에 스탠드얼론 시스템으로 부착되어 태양추적 및 관련 제어기능을 수행한다. 그러나 본 무선망활용 태양추적기는 PC와 태양광어레이가 지그비 무선망으로 연결되는 구조이다. 무선망을 활용함으로서 기존 태양추적기 대비 제어모듈의 역할이 매우 단순화되어 장치의 강건함, 내구성 및 경제성이 증가되는 효과가 있다. 무선망을 활용함으로서 태양광에레이 측은 무선데이터 송수신 기능과 모터제어 부분만 구현되어도 되며 나머지 기능들은 PC에서 처리해서 무선으로 태양광에레이 모듈에게 전달된다. 또한 고가의 센서 등도 PC에만 구현되고 필요한 데이터는 PC에서 처리하고 계산해서 무선으로 태양광어레이에게 전달하는 구조이다. 그리고 태양추적을 위한 정밀한 자동제어 알고리즘도 PC에서는 충분히 구현할 수 있으며 이를 수행한 후 필요 데이터를 태양광어레이 모듈에게 무선으로 전달한다. 본 기술개발 내용에 대한 시제품이 완성단계에 있으며 필드테스트 수행을 준비하고 있다.
A Study on Properites of PV Solar cell n-type ZnS Using RF Sputtering Method
양현훈(Yang, Hyeon-Hun),김한울(Kim, Han-Wool),한창준(Han, Chang-Jun),소순열(So, Soon-Youl),박계춘(Park, Gye-Choon),이진(Lee, Jin),정해덕(Chung, Hea-Deok),이석호(Lee, Suk-Ho),백수웅(Back, Su-Ung),나길주(Na, Kil-Ju),정운조(Jeong, Woon 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
ZnS thin films were deposited with the radio frequency magnetron sputtering technique at various temperatures and sputtering powers. With the increase in the deposition temperature and the decrease in the radio frequency sputtering power, the crystallinity was increased and the surface roughness was decreased, which lead to the decrease in the electrical resistivity of the film. It is also clearly observed that, the intensity of the (111) XRD peak increases with increasing the substrate temperature. On the other hand, as seen in the FWHM decreased with increasing the substrate temperature. Since the FWHM of the (111) diffraction peak is inversely properties to the grain size of the film, then grain size of ZnS thin film increases with increasing the substrate temperature. The electrical resistivity and optical transmittance of the ZnS film as a function of the post-annealing temperature. It can be seen that with the annealing temperature set at 400?C, the resistivity decreases to a minimum value of 2.1{times}10^{-3};{Omega}cm and the transmittance increases to a maximum value of 80% of the ZnS film.
A Study on Properites of PV Solar cell AZO thin films post-annealing by RTP technique
양현훈(Yang, Hyeon-Hun),김한울(Kim, Han-Wool),한창준(Han, Chang-Jun),소순열(So, Soon-Youl),박계춘(Park, Gye-Choon),이진(Lee, Jin),정해덕(Chung, Hea-Deok),이석호(Lee, Suk-Ho),백수웅(Back, Su-Ung),나길주(Na, Kil-Ju),정운조(Jeong, Woon 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
In this paper, ZnO:Al thin films with c-axis preferred orientation were prepared on Soda lime glass substrates by RF magnetron sputtering technique. AZO thin film were prepared in order to clarify optimum conditions for growth of the thin film depending upon process, and then by changing a number of deposition conditions and substrate temperature conditions variously, structural and electrical characteristics were measured. For the manufacture of the AZO were vapor-deposited in the named order. It is well-known that post-annealing is an important method to improve crystal quality. For the annealing process, the dislocation nd other defects arise in the material and adsorption/decomposition occurs. The XRD patterns of the AZO films deposited with grey theory prediction design, annealed in a vacuum ambient(2.0{times}10-3Torr)at temperatures of 200, 300, 400 and 500?C for a period of 30min. The diffraction patterns of all the films show the AZO films had a hexagonal wurtzite structure with a preferential orientation along the c-axis perpendicular to the substrate surface. As can be seen, the (002)peak intensities of the AZO films became more intense and sharper when the annealing temperature increased. On the other hand, When the annealing temperature was 500?C the peak intensity decreased. The surface morphologies and surface toughness of films were examined by atomic force microscopy(AFM, XE-100, PSIA). Electrical resistivity, Gall mobility and carrier concentration were measured by Hall effect measuring system (HL5500PC, Accent optical Technology, USA). The optical absorption spectra of films in the ultraviolet-visibleinfrared( UV-Vis-IR) region were recorder by the UV spectrophotometer(U-3501, Hitachi, Japan). The resistivity, carrier concentration, and Hall mobility of ZnS deposited on glass substrate as a function of post-annealing.
양현훈(Yang, Hyeon-Hun),백수웅(Back, Su-Ung),김한울(Kim, Han-Wool),한창준(Han, Chang-Jun),이석호(Lee, Suk-Ho),정운조(Jeong, Woon-Jo),박계춘(Park, Gye-Choon),이진(Lee, Jin),정해덕(Chung, Hae-Deok) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
CuInS₂ thin films were synthesized by sulfurization of Cu/In Stacked elemental layer deposited onto glass Substrates by vacuum furnace annealing at temperature 200[?C]. And structural and electrical properties were measured in order to certify optimum conditions for growth of the ternary compound semiconductor CuInS₂ thin films with non-stoichiometry composition. CuInS₂ thin film was well made at the heat treatment 200[?C] of SLG/Cu/In/S stacked elemental layer which was prepared by thermal evaporator, and chemical composition of the thin film was analyzed nearly as the proportion of 1 : 1 : 2. Physical properties of the thin film were investigated at various fabrication conditions substrate temperature, annealing and temperature, annealing time by XRD, FE-SEM and hall measurement system. At the same time, carrier concentration, hall mobility and resistivity of the thin films was 9.10568{times}10^{17} [cm^{-3}], 312.502 [cm²/V{cdot}s] and 2.36{times}10^{-2} [{Omega}{cdot}cm], respectively.
진공 석영관에서 Selenization한 CuInSe₂ 박막 특성분석
양현훈(Yang, Hyeon-Hun),백수웅(Back, Su-Ung),김한울(Kim, Han-Wool),한창준(Han, Chang-Jun),나길주(Na, Kil-Ju),김영준(Kim, Young Jun),소순열(So, Soon-Youl),박계춘(Park, Gye-Choon),이진(Lee, Jin),정해덕(Chung, Hae-Deok) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
본 실험에서는 CuInSe₂ 3원물질을 화학량론적 조성비가 되도록 박막을 제조하기 위해 각 단위원소를 원자비에 맞춰 전자선가열 진공증착기를 사용하여 Cu, In, Se 순으로 증착하였다. 90?C이하의 온도에서 CuIn₂, In상이 주를 이루며, 100?C이상에서는 Cu_{11}In_9상이 나타나기 시작하고 In상이 증가하였다. 10^{-3}torr이상의 진공석영관에서 열처리와 동시에 Selenization을 통해 제작된 CuInSe₂박막은 열처리온도 250?C에서는 CuxSe, CuSe등의 2차상들이 나타나다가 450?C이상의 고온에서 CuInSe₂ 단일상을 형성하였다. 이로부터 진공중에서 반응을 시켰을 때, 더 낮은 온도에서 반응이 일어나고 열역학적으로 보다 안정한 소수의 화합물들이 쉽게 형성됨을 확인할 수 있었다. 특히 250?C에서는 Sphalerite 구조를 가지다가 350?C이상의 온도에서 Selenization하였을 때 Chalcopyrite 구조를 가졌다. 박막이 두꺼워지면서 결정립의 크기가 커지고 응력이 작아지는 특성을 보였다. 에너지 밴드갭은(E_g)은 Cu/In 성분비율이 클수록 작은값을 보였으며, 결절립크기가 증대되므로 결국 흡수계수가 낮아짐을 알 수 있다. 또한 두께가 증가할수록 전반적으로 흡수계수가 증가하였고 Cu/In의 성분비율이 0.97일 때 기초흡수파장은 1,169nm이고 에너지밴드갭은 1.06eV이었으며, 두께 1.5{mu}m이상일 때 전반적으로 양호한 상태의 p-type CuInSe₂박막을 제작하였다.
김영모(Young Mo Kim),박선기(Sun Ki Park),신준순(Jun Sun Shin),전용선(Yong Sun Jeon),한창준(Chang Jun Han),조정일(Jung Il Cho) 대한두경부종양학회 2002 대한두경부 종양학회지 Vol.18 No.1
Background and Objectives: Recently the tenn 'papillary microcarcinoma' has been proposed to designate carcinoma of 10 mm or less in diameter. In some cases, cervical lymph node metastasis preceding the occurrence of the primary tumor may be the first and sole manifestation of the disease. The objective of this study is to assess the clinical features of cervical metastasis in papillary microcarcinoma of thyroid glands. Materials and Methods: 9 cases with papillary microcarcinoma with neck metastasis were analyzed retrospectively. 5 cases are men and 4 are women. All patients complained of painless, movable neck mass. The symptom had been present from 1 month to 36 months. We reviewed clinical history, imaging studies, the results of fine needle aspiration, the surgical method, the pathologic results. Results: In 9 cases, no abnormalities of the thyroid gland were shown by imaging studies and thyroid scan. 3 cases were diagnosed by fine needle aspiration cytology. the others were not. Total thyroidectomy and neck dissection were performed in 9 cases and then pathology reports showed 2 case of multiple, 2 case of contralateral single and 5 cases of unilateral single thyroid microcarcinoma. They have no recurrence during follow-up period. Conclusions: Cervical metastasis from papillary microcarcinoma is variable clinical manifestation. The diagnosis of cervical metastasis from papillary microcarcinoma should be considered in patient with neck mass. We recommend total thyroidectomy with neck dissection and postoperative radioactive iodine ablation therapy in neck metastasis from papillary thyroid microcarcinoma.
백수웅(Baek, Su-Ung),양현훈(Yang, Hyeon-Hun),한창준(Han, Chang-Jun),김한울(Kim, Han-Wool),나길주(Na, Kil-Ju),이석호(Lee, Suk-Ho),정해덕(Chung, Hae-Deok),박계춘(Park, Gye-Choon) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
Selenium 물질은 지구상에 많은 양이 존재하고, 가격이 저렴하다. 그 성질은 분광감도가 시감도에 잘 일치하고, 광학적 특성이 뛰어나서 태양전지로 연구도 활발히 진행 중이다. 본 연구에서는 Se박막을 열저항증착방법을 이용하여 증착시, 기판온도를 변화를 시켜 그 구조적특성의 변화를 관찰하였다. 50?C에서 변화를 시작하여 70?C, 100?C의 변화에서 각각 단사정계, 육방정계 결정구조가 나타났다. XRD 분석결과 100?C에서 증착한 sample의 회절강도가 70?C에서 증착한 sample보다 작은회절강도를 나타내었다. 추후 열처리공정등을 통하여 보완하면, CISe 박막 화합물 태양전지 연구에 큰 효과를 나타낼 수 있을 것으로 예상된다.
인간의 갑상선 결절성 과증식증과 유두상 암종에서의 Endothelial Nitric Oxide의 발현
김영모(Young Mo Kim),조정일(Jung Il Cho),김용재(Yong Jai Kim),양태용(Tae Yong Yang),김대형(Dae Hyung Kim),박창신(Chang Sin Park),한창준(Chang Jun Han) 대한두경부종양학회 2001 대한두경부 종양학회지 Vol.17 No.2
Background and Objectives: Nitric oxide (NO) is generated in mammalian tissue by the conversion of L-arginine to L-citrulline. This reaction is catalyzed by nitric oxide synthase (NOS). NO is an important bioactive agent and a signalling molecule that mediates a variety of biologic actions such as vasodilation, neurotransmission, host defense, and iron metabolism but increased NO production may also contribute to the pathogenesis of a various of disorders, including cancer. Before now, the role of NO in thyroid gland is still investigated and it was supposed that NO mediate the angiogenesis in tumor growth. Others journal and works identified the expression of iNOS that involve by neutrophil and eNOS that involve in part in the vascular remodeling and to understand the role of NO in human thyroid gland. But authors revealed only eNOS in thyroid neoplasm. iNOS was identifed by inflammation in fault. Materials and Methods: Western blot analysis was performed, using a polyclonal antibody against eNOS (Rabbit polyclonal IgG). Using the same antibody, the distribution of eNOS was examined in 15 formalin-fixed paraffin embedded samples by immunohistochemistry. By NADPH consumption rate, NOS activity was estimated at nodular hyperplasia. Results: Western blot analysis exhibited that eNOS was significantly elevated in thyroid papillary carcinoma, compared to that in nodular hyperplasia and normal tissue. Immunohistochemistry showed that the immunoreacitivity was present more significantly in thyroid follicular epithelial cell layer than vascular endothelial cell. NOS activity increased in nodular hyperplasia. Conclusions: Thyroid papillary cancer without neutrophil invasion expressed only eNOS. The endothelial localization of eNOS may play an important role in pathogenensis of human thyroid nodular hyperplasia and the follicular localization of thyroid papillary carcinomas.