• Proceedings of the Korean Vacuum Society Conference
• /
• 2013.08a
• /
• pp.315.2-315.2
• /
• 2013

본 논문에서는 반사방지 VF2-TrFE 박막을 이용한 MIS Solar cell을 제작하여 전기적, 구조적 특성을 평가하였다. ALD법을 이용하여 고유전율의 화학적 안정성이 우수한 산화알루미늄을 절연층으로 한 Al/Al2O3/Si(100)을 제작하였으며 cell의 효율을 향상시키기 위해 spin coating법을 이용하여 VF2-TrFE 반사방지막을 증착시켰다. 제작된 반사방지 VF2-TrFE 박막 MIS solar cell은 MIS 커패시터의 전류밀도-전계 특성, 커패시턴스-전압 특성과 반사방지막 열처리 조건에 따른 태양전지 효율을 Solar simulator 및 Quantum Efficiency system으로 측정하였다.

• Journal of the Korean Solar Energy Society
• /
• v.34 no.4
• /
• pp.123-129
• /
• 2014

Photovoltaic and fuel cell systems can be used as power source in mobile robots. At this time the photovoltaic system generally generate power in daytime. The starting time of fuel cell is slower than the lithium battery. To compensate for these disadvantages, a battery charge-discharge system is used. Especially the bi-directional converter is used mainly in the charge-discharge method. The controller in a buck converter controls the input voltage of the converter to meet the maximum power point tracking(MPPT) performance. First of all, the simulations of hybrid system for battery charge-discharge system in each step simulated using solar and fuel cell modeling as input source in PSIM. Experiment of the buck and bi-directional converter system is conducted through using photovoltaic/fuel cel simulator(pCube) instead of solar and fuel cell. This hybrid system for battery charge discharge using photovoltaic/fuel cell generates emergency power for the communication system in mobile robot.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2010.06a
• /
• pp.242-242
• /
• 2010

산화 알루미늄($Al_2O_3$) 박막을 p-type Czochralski(CZ) Si 위에 Remote Plasma Atomic Layer Deposition(RPALD)을 이용하여 저온 공정으로 증착하였다. Photolithography 공정으로 grid 패턴을 형성한 후 열 증착기로 알루미늄을 증착하여 MIS-IL (Metal-Insulator-Semiconductor Inversion Layer) solar cell을 제작하였다. 반응소스로는 Trimethylaluminum (TMA)과 $O_2$를 이용하였다. $Al_2O_3$ 박막의 전기적 특성 평가를 위해 MIS capacitor를 제작하여 Capacitance-voltage (C-V), Current-voltage (I-V), Interface state density ($D_{it}$)를 평가하였으며 Solar simulator를 이용하여 MIS-IL Solar cell의 Efficiency을 측정하였다.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2013.08a
• /
• pp.313.2-313.2
• /
• 2013

본 연구에서는 기존에 연구된 Solar Cell 보다 구조 및 제작이 단순한 $Al/Al_2O_3/Si$(100) Solar cell을 제작하여 평가하였다. 기판으로는 p-type Si(100), 0.5~2 ${\Omega}{\cdot}cm$을 사용하여 chemical cleaning 후 ALD(Atom Layer Deposition)법으로 Al2O3 터널링 절연막을 증착하였으며, 박막의 두께를 1~10 nm로 변화시켜 MIS 커패시터의 터널링 효과를 평가하였다. MIS 커패시터의 전기적 특성평가를 위해 누설전류 밀도-전계 특성은 pA meter/DC Voltage source를 사용하였고, 커패시턴스-전압특성, D-factor 특성은 precision LCR meter를 사용하였다. $Al/Al_2O_3/Si$(100) Solar cell의 특성평가를 위해 300~1100nm 파장영역에 따른 양자 효율을 평가하기 위해 Quantum Efficiency system (QE)을 사용하였고, Stanard Test Conditions 100 $mW/cm^2$, AM1.5, $25^{\circ}C$ 조건의 Voc, Isc, Jsc, FF (Fill Factor) 및 Efficiency(%)를 평가하기 위해 Solar simulator를 이용하였다.

• Proceedings of the KIEE Conference
• /
• 2005.07b
• /
• pp.1775-1777
• /
• 2005

In this paper, maximum output of three different temperature conditions of the photovoltaic modules have been tested and compared to obtain the optimum conditions for the maximum power operation. Temperatures of the cell and module have been set to $20^{\circ}C$, $25^{\circ}C$ and $30^{circ}C$ under the constant light intensity of 1kW/$m^2$. 125${\times}$125mm 36 single crystal solar cells having 80 [W] each have been serially connected in the module. From the results, maximum output deviation of 4.67% has been obtained under the ceil temperature of $20^{\circ}C$ and module temperature of $30^{\circ}C$ while minimum deviation of 0.41${\sim}$0.92% has been measured under the same temperatures of cell and module. Therefore it has been found that the temperature of both cell and module should be fixed to $25^{\circ}C$ to obtain stable data unless the temperature coefficient should be compensated for the testing sample.

• Proceedings of the KIEE Conference
• /
• 2006.07b
• /
• pp.1199-1200
• /
• 2006

In this paper, I try to measure the electrical characteristics of PV cell for lanterns with solar simulator and simulated with PC1D software. I keep my eye on the characteristics variation of PV cell as a temperature change. Therefore, I try to increase a temperature of controlled block from $10^{\circ}C$ to $50^{\circ}C$ while measuring the PV cell. As a result, A variation caused by voltage have an effect on the efficacy of PV cell. Hence, it is an important variable when a designer plan to make a solar cell for lanterns.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 2006.05a
• /
• pp.233-236
• /
• 2006

In this paper, I try to measure the electrical characteristics of PV cell for lanterns with solar simulator and simulated with PC1D software. 1 keep my eye on the characteristics variation of PV cell as a temperature change. Therefore, I try to increase a temperature of controlled block from $10^{\circ}C\;to\;50^{\circ}C$ while measuring the PV cell. As a result A variation caused by voltage have an effect on the efficacy of PV cell. Hence, it is an important variable when a designer plan to make a solar cell for lanterns.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2007.06a
• /
• pp.22-23
• /
• 2007

We tried to find the possibility of mono-crystalline silicon solar cell for photovoltaic concentrating system which is major cost portion for PV system using fresnel lens. With solar simulator and I-V curve tracer, we analyzed maximum output characteristics and measured the temperature of concentrated area using infrared camera. Because of temperature increase, there was no merit when concentrating. But at low radiant power, it showed more efficient operation. The combination of heat-sink technology and tracking system to our concentrating PV system would give better performance results.

• Journal of the Semiconductor & Display Technology
• /
• v.10 no.2
• /
• pp.65-71
• /
• 2011

Properties of each layer in DSSC were investigated to improve solar cell characterstics. Also in this study, low costsolar simulator system is fabricated and used. Efficiency of DSSC is better in the case of thinner semiconductive layer, because thick semiconductive layer is acted as resistor. Sc-doped ZnO thin films showed better electrical property by proper donor doping effect. Among the dyes, DSSC containing N719 showed higher efficiency, because N719 have smaller electron affinity and shallow band gap.

• Proceeding of EDISON Challenge
• /
• 2015.03a
• /
• pp.320-323
• /
• 2015

본 연구에서는 18 atoms unit cell graphene film을 기반으로 한 graphene/h-BN heterostructure의 bandgap 변화에 대해 EDISON LCAODFTLab simulator의 DFT기반 전자구조계산을 통해 알아보았다. Graphene 상에 BN-doping 형태로 주어진 여러 heterostructure의 전자구조계산을 통해 태양전지의 이론적 최적효율을 나타내는 1.2eV 정도의 값을 갖는 구조를 찾을 수 있었다.