• 제목/요약/키워드: mono crystalline silicon solar cell

검색결과 35건 처리시간 0.033초

SOD(Spin On Doping)법을 이용한 저가 고효율 태양전지에 관한 연구 (A Study of low cost and high efficiency Solar Cell using SOD(spin on doping))

  • 박성현;김경해;문상일;김대원;이준신
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
    • /
    • pp.1054-1056
    • /
    • 2002
  • High temperature Kermal diffusion from $POCl_3$ source usually used for conventional process through put of a cell manufacturing line and potentially reduce cell efficiency through bulk like time degradation. To fabricate high efficiency solar cells with minimal thermal processing, spin-on-doping(SOD) technique can be employed to emitter diffusion of a silicon solar cell. A technique is presented to emitter doping of a mono-crystalline solar cell using spin-on doping (SOD). Moreover it is shown that the sheet resistance variation with RTA temperature and time fer mono-crystalline and multi-crystalline silicon samples. This novel SOD technique was successfully used to produces 11.3% efficiency l04mm by 104mm size mono-crystalline silicon solar cells.

  • PDF

단결정 실리콘 태양전지의 집광형 시스템으로의 적용 가능성 (Application Possibility of Mono-Crystalline Silicon Solar Cell for Photovoltaic Concentrating System)

  • 강경찬;강기환;유권종;허창수
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
    • /
    • 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.

  • PDF

결정질 실리콘 태양광발전모듈 인증 실적의 시계열 분석 (Time Series Analysis of Crystalline Silicon Photovoltaic Module Certification Results)

  • 한윤철;김익표;강규영
    • 한국태양에너지학회 논문집
    • /
    • 제37권3호
    • /
    • pp.33-45
    • /
    • 2017
  • Crystalline silicon photovoltaic module certification began in 2007. "Renewable Energy Equipment Certification Scheme" was implemented until July 28, 2015. Then, the scheme was changed to "KS Certification Scheme" since July 29, 2015. A total of 2,331 models have been certified by 2016. The proportion of multi crystalline modules in certified products is higher than that of mono crystalline modules, and Korean modules account for 78% of the total certification modules. Chinese solar cells account for the highest percentage of 40% of the total modules and 62.4% of modules certified in 2016 use Chinese solar cells. With the development of technology, module power is continuously increasing, and efficiency is also rising. The average efficiency of mono crystalline module is 0.74% higher than the average of multi crystalline module. As a result of comparing domestic module with Chinese module, the highest efficiency of mono crystalline module and multi crystalline module and the average efficiency of mono crystalline module are higher than those of Chinese module, but the average efficiency of multi crystalline module is similar to that of Chinese module.

알카리 금속을 배재한 단결정 실리콘 태양전지의 텍스쳐링 공정 (Alkali metal free texturing for mono-crystalline silicon solar cell)

  • 김태윤;김회창;김범호
    • 한국신재생에너지학회:학술대회논문집
    • /
    • 한국신재생에너지학회 2010년도 추계학술대회 초록집
    • /
    • pp.48.1-48.1
    • /
    • 2010
  • 단결정 실리콘 태양전지 제조 공정이 진행되는 과정에서 각종 오염물에 의해 표면이 오염된다. 태양전지의 효율 개선을 위한 표면 texturing 공정은 주로 wet etch을 주로 사용한다. Wet etch 공정 시 주로 사용되는 KOH 용액은 texturing 후 실리콘 웨이퍼 표면에 K+ 이온을 남기고 이는 태양전지 표면에서의 불순물로 작용하여 효율을 저하시키는 요인이 된다. 이를 제거하기 위해 불산 및 오존에 의한 세정 공정이 추가로 필요로 하게 된다. 이러한 공정을 최소화 하며 잔존하는 알칼리 금속도 제거하기 위해, etchant로 알카리 용액이 아닌 ethylenediamine을 사용하여 texturing 후 KOH 용액과 비교해 보았다.

  • PDF

프레넬 렌즈를 이용한 집광 시 단결정 실리콘 태양전지의 전기적 특성 (Electrical Characteristics of Mono Crystalline Silicon Solar Cell for Concentrating PV System using Fresnel Lenses)

  • 강경찬;강기환;유권종;허창수
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2007년도 제38회 하계학술대회
    • /
    • pp.218-219
    • /
    • 2007
  • Silicon feed stock shortage have acted as major restraints for growth of photovoltaic industry. Concentrating photovoltaic (CPV) system will reduce the use of silicon PV materials. This paper presents the application possibility of mono-crystalline silicon solar cell, which has increased in market share, for PV concentrator. We measured the power of solar cell using sun simulator and I-V curve tracer and compared the results. The comparison of results showed that the concentrated solar cell generated the power more approximately 7 times than without concentration in spite of non-heat sink. If CPV technology included heat sink combines already developed PV tracking system, it will have a merit economically.

  • PDF

Multi-crystalline Silicon Solar Cell with Reactive Ion Etching Texturization

  • Park, Seok Gi;Kang, Min Gu;Lee, Jeong In;Song, Hee-eun;Chang, Hyo Sik
    • 한국진공학회:학술대회논문집
    • /
    • 한국진공학회 2016년도 제50회 동계 정기학술대회 초록집
    • /
    • pp.419-419
    • /
    • 2016
  • High efficiency silicon solar cell requires the textured front surface to reduce reflectance and to improve the light trapping. In case of mono-crystalline silicon solar cell, wet etching with alkaline solution is widespread. However, the alkali texturing methods are ineffective in case of multi-crystalline silicon wafer due to grain boundary of random crystallographic orientation. The acid texturing method is generally used in multi-crystalline silicon wafer to reduce the surface reflectance. However the acid textured solar cell gives low short-circuit current due to high reflectivity while it improves the open-circuit voltage. To reduce the reflectivity of multi-crystalline silicon wafer, double texturing method with combination of acid and reactive ion etching is an attractive technical solution. In this paper, we have studied to optimize RIE experimental condition with change of RF power (100W, 150W, 200W, 250W, 300W). During experiment, the gas ratio of SF6 and O2 was fixed as 30:10.

  • PDF

Aluminum 및 Aluminum-Boron후면 전극에 따른 단결정 실리콘 태양전지 특성 (Characteristics of Mono Crystalline Silicon Solar Cell for Rear Electrode with Aluminum and Aluminum-Boron)

  • 홍지화;백태현;김진국;최성진;김남수;강기환;유권종;송희은
    • 한국태양에너지학회:학술대회논문집
    • /
    • 한국태양에너지학회 2011년도 추계학술발표대회 논문집
    • /
    • pp.34-39
    • /
    • 2011
  • Screen printing method is a common way to fabricate the crystalline silicon solar cell with low-cost and high-efficiency. The screen printing metallization use silver paste and aluminum paste for front and rear contact, respectively. Especially the rear contact between aluminum and silicon is important to form the back surface filed (Al-BSF) after firing process. BSF plays an important role to reduces the surface recombination due to $p^+$ doping of back surface. However, Al electrode on back surface leads to bow occurring by differences in coefficient of thermal expansion of the aluminum and silicon. In this paper, we studied the properties of mono crystalline silicon solar cell for rear electrode with aluminum and aluminum-boron in order to characterize bow and BSF of each paste. The 156*156 $m^2$ p-type silicon wafers with $200{\mu}m$ thickness and 0.5-3 ${\Omega}\;cm$ resistivity were used after texturing, diffusion, and antireflection coating. The characteristics of solar cells was obtained by measuring vernier callipers, scanning electron microscope and light current-voltage. Solar cells with aluminum paste on the back surface were achieved with $V_{OC}$ = 0.618V, JSC = 35.49$mA/cm^2$, FF(Fill factor) = 78%, Efficiency = 17.13%.

  • PDF

결정질 실리콘 태양전지용 스크린 프린팅 전극 공정 개발 (Screen Printing Electrode Formation Process for Crystalline Silicon Solar Cell)

  • 엄태우;이상협;송찬문;박상용;임동건
    • Current Photovoltaic Research
    • /
    • 제5권1호
    • /
    • pp.9-14
    • /
    • 2017
  • The screen printing technique is one of process to form electrode for crystalline silicon solar cell and has been studied a lot, because it has many advantages such as low price, high efficiency and mass production due to simple and fast process. The reason why electrode formation is important is for influence of series resistance and amount of incident light in crystalline silicon solar cell. In this study, electrode was formed by screen printing method with various conditions like squeegee angle, printing speed, snap off, printing pressure. After optimizing various conditions, double printing method was applied to obtain low series resistance and high aspect ratio. As a result, we obtained electrode resistance 45.31 ohm, aspect ratio 4.38, shading loss 7.549% mono-crystalline silicon solar cell with optimal double screen printing condition.

단결정 실리콘 태양전지 도핑 확산 공정에서 주입되는 $O_2$ 가스와 PSG 유무에 따른 특성 변화 (The Study on the Characteristic of Mono Crystalline Silicon Solar Cell with Change of $O_2$ Injection during Drive-in Process and PSG Removal)

  • 최성진;송희은;유권종;이희덕
    • 한국태양에너지학회:학술대회논문집
    • /
    • 한국태양에너지학회 2011년도 춘계학술발표대회 논문집
    • /
    • pp.105-110
    • /
    • 2011
  • The doping procedure in crystalline silicon solar cell fabrication usually contains oxygen injection during drive-in process and removal of phosphorous silicate glass(PSG). In this paper, we studied the effect of oxygen injection and PSG on conversion efficiency of solar cell. The mono crystalline silicon wafers with $156{\times}156mm^2$, $200{\mu}m$, $0.5-3.0{\Omega}{\cdot}cm$ and p-type were used. After etching $7{\mu}m$ of the surface to form the pyramidal structure, the P(phosphorous) was injected into silicon wafer using diffusion furnace to make the emitter layer. After then, the silicon nitride was deposited by the PECVD with 80 nm thickness and 2.1 refractive index. The silver and aluminium electrodes for front and back sheet, respectively, were formed by screen-printing method, followed by firing in 400-425-450-550-$880^{\circ}C$ five-zone temperature conditions to make the ohmic contact. Solar cells with four different types were fabricated with/without oxygen injection and PSG removal. Solar cell that injected oxygen during the drive-in process and removed PSG after doping process showed the 17.9 % conversion efficiency which is best in this study. This solar cells showed $35.5mA/cm^2$ of the current density, 632 mV of the open circuit voltage and 79.5 % of the fill factor.

  • PDF

Radio Frequency Multi-Hollow Cathode 플라즈마 시스템을 이용한 대면적 블랙 실리콘 태양전지에 관한 연구 (A Study on Large Area Black Silicon Solar Cell Using Radio-Frequency Multi-Hollow cathode Plasma System)

  • 유진수;임동건;양계준;이준신
    • 대한전기학회논문지:전기물성ㆍ응용부문C
    • /
    • 제52권11호
    • /
    • pp.496-500
    • /
    • 2003
  • A low-cost, large area, random, maskless texturing scheme independent of crystal orientation is expected to significantly impact terrestrial photovoltaic technology. We investigated silicon surface microstructures formed by reactive ion etching (RIE) in Multi-Hollow cathode system. Desirable texturing effect has been achieved when radio-frequency (rf) power of about 20 Watt per one hollow cathode glow is applied for our RF Multi-Hollow cathode system. The black silicon etched surface shows almost zero reflectance in the visible region as well as in near IR region. The etched silicon surface is covered by columnar microstructures with diameters from 50 to 100 nm and depth of about 500 nm. We have successfully achieved 11.7% efficiency of mono-crystalline silicon solar cell and 10.2% multi-crystalline silicon solar cell.