티타니아 나노튜브를 이용한 염료감응 태양전지

김태현,정지훈,Kim, Taehyun,Jung, Jihoon 한국화학공학회 2018 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.56 No.4

HF, NaF, $NH_4F$와 같이 플루오르 이온(F-)이 함유된 전해질에서 티타늄 금속판을 양극산화시켜 $0.34{\mu}m$부터 최대 $8.9{\mu}m$까지 다양한 길이의 티타니아 나노튜브(TNT)를 제조하였다. 양극산화에 의해 제조된 TNT를 $450^{\circ}C$에서 소성시키면 광 활성을 가지는 아나타제 결정이 생성되었다. TNT 기반 염료감응 태양전지(DSSC)는 TNT 길이가 $2.5{\mu}m$일때 광전환 효율이 4.71%로 최대를 나타내었다. 이 값은 티타니아 페이스트를 코팅하여 제작한 FTO 기반 DSSC의 광전환 효율 보다 약 18% 높았다. 또한 TNT-DSSC의 단락전류밀도($J_{sc}$)는 $9.74mA/cm^2$로 FTO-DSSC의 $7.19mA/cm^2$ 보다 약 35% 이상 높았다. TNT-DSSC 태양전지의 광전환 효율이 더 높은 이유는 염료에서 생성된 광전자가 TNT를 통해 전극 표면으로 빨리 전달되어 광전자와 염료가 재결합 되는 것이 억제되었기 때문이다. Titanium nanotubes (TNT) of various lengths ranging from $0.34^{\circ}C$ to a maximum of $8.9^{\circ}C$ were prepared by anodizing a titanium metal sheet in an electrolyte containing fluorine ion ($F^-$) of HF, NaF and $NH_4F$. When TNT prepared by anodizing was calcined at $450^{\circ}C$, anatase crystals with photo activity were formed. The TNT-based dye-sensitized solar cell (DSSC) showed a maximum conversion efficiency of 4.71% when the TNT length was $2.5{\mu}m$. This value was about 18% higher than photo conversion efficiency of the FTO-based DSSC coated with titania paste. And the short circuit current density ($J_{sc}$) of the TNT-DSSC was $9.74mA/cm^2$, which was about 35% higher than the $7.19mA/cm^2$ of FTO-DSSC. The reason for the higher conversion efficiency of TNT-DSSC solar cells is that photoelectrons generated from dyes are rapidly transferred to the electrode surface through TNT, and the recombination of photoelectrons and dyes is suppressed.

Transient Stability Enhancement by DSSC with Fuzzy Supplementary Controller

Mansour-Khalilian,Maghsoud-Mokhtari,Daryoosh-Nazarpour,Behrouz-Tousi 대한전기학회 2010 Journal of Electrical Engineering & Technology Vol.5 No.3

The distributed flexible alternative current transmission system (D-FACTS) is a recently developed FACTS technology. Distributed Static Series Compensator (DSSC) is one example of DFACTS devices. DSSC functions in the same way as a Static Synchronous Series Compensator (SSSC), but is smaller in size, lower in price, and possesses more capabilities. Likewise, DSSC lies in transmission lines in a distributed manner. In this work, we designed a fuzzy logic controller to use the DSSC for enhancing transient stability in a two-machine, two-area power system. The parameters of the fuzzy logic controller are varied widely by a suitable choice of membership function and parameters in the rule base. Simulation results demonstrate the effectiveness of the fuzzy controller for transient stability enhancement by DSSC.

Spontaneous solar water splitting by DSSC/CIGS tandem solar cells

Chae, Sang Youn,Park, Se Jin,Joo, Oh-Shim,Min, Byoung Koun,Hwang, Yun Jeong Elsevier 2016 Solar Energy Vol.135 No.-

<P><B>Abstract</B></P> <P>A tandem solar cell equipped with a dye-sensitized solar cell (DSSC) and a CuIn<I> <SUB>x</SUB> </I>Ga<SUB>1−</SUB> <I> <SUB>x</SUB> </I>S<I> <SUB>y</SUB> </I>Se<SUB>1−</SUB> <I> <SUB>y</SUB> </I> (CIGS) bottom sub-cell was assessed for photovoltaic cell (PV)-assisted water splitting application. Two types of cobalt complexes ([Co(bpy)<SUB>3</SUB>]<SUP>2+/3+</SUP> and [Co(phen)<SUB>3</SUB>]<SUP>2+/3+</SUP>) were tested as the redox couples in the DSSC sub-cell. Of these, [Co(phen)<SUB>3</SUB>]<SUP>2+/3+</SUP> showed a larger open circuit potential and higher power conversion efficiency for the DSSC/CIGS tandem cell with high stability due to its more positive redox potential. Two unit cells of the DSSC/CIGS tandem cell were assembled as a module to supply sufficient power for water electrolysis. Spontaneous solar water splitting was realized when the DSSC/CIGS module was connected to a stainless steel anode and a platinum cathode. The [Co(phen)<SUB>3</SUB>]<SUP>2+/3+</SUP> redox couple in the tandem cell was found to have high solar to hydrogen conversion efficiency (<I>η</I> <SUB>STH</SUB> =4.65%) in the PV-assisted electrolysis cell.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Solution processed DSSC/CIGS monolithic tandem cell module was prepared for spontaneous water splitting. </LI> <LI> 4.65% of solar to hydrogen efficiency was archived by two unit cells of DSSC/CIGS tandem cell. </LI> <LI> Cobalt polypyridine based redox couple was applied for enhancement of <I>V</I> <SUB>oc</SUB> and stability of DSSC/CIGS tandem cell. </LI> </UL> </P>

Study on TiO₂ nanoparticle for Photoelectrode in Dye-sensitized Solar Cell

조슬기(Jo, Seulki),이경주(Lee, Kyungjoo),송상우(Song, Sangwoo),박재호(Park, Jaeho),문병무(Moon, Byungmoo) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.11

Dye-sensitized solar cells (DSSC) have recently been developed as a cost-effective photovoltaic system due to their low-cost materials and facile processing. The production of DSSC involves chemical and thermal processes but no vacuum is involved. Therefore, DSSC can be fabricated without using expensive equipment. The use of dyes and nanocrystalline TiO₂ is one of the most promising approaches to realize both high performance and low cost. The efficiency of the DSSC changes consequently in the particle size, morphology, crystallization and surface state of the TiO₂. Nanocrystalline TiO₂ materials have been widely used as a photo catalyst and an electron collector in DSSC. Front electrode in DSSC are required to have an extremely high porosity and surface area such that the dyes can be sufficiently adsorbed and be electronically interconnected, resulting in the efficient generation of photocurrent within cells. In this study, DSSC were fabricated by an screen printing for the TiO₂ thin film. TiO₂ nanoparticles characterized by X-ray diffractometer (XRD) and scanning electron microscope (SEM) and scanning auger microscopy (SAM) and zeta potential and electrochemical impedance spectroscopy(EIS).In addition, DSSC module was modeled and simulated using the SILVACO TCAD software program. Improve the efficiency of DSSC, the effect of TiO₂ thin film thickness and TiO₂ nanoparticle size was investigated by SILVACO TCAD software program.

TTIP가 첨가된 저온소성용 TiO2 Paste를 이용한 DSSC의 효율 특성

권성열,심창수,양 욱 한국전기전자재료학회 2019 전기전자재료학회논문지 Vol.32 No.1

Recently, the application field of solar panels is increasing. Accordingly, the demand for flexible devices isalso steadily increasing. It is therefore necessary to develop TiO2 paste for low-temperature annealing for flexible DSSCfabrication. In this study, the TiO2 paste for low-temperature annealing with varying molar ratio of titanium isopropoxide(TTIP) was prepared, and DSSC was fabricated and its characteristics were compared. As a result, there was nodeformation of the particles on the surface in the SEM data. However, the highest open circuit voltage, short circuitcurrent, and fill factor were measured in the DSSC unit cell prepared by adding 0.5 mol of TTIP to the TiO2 paste,and the highest efficiency was 4.148%. 최근 솔라 패널의 적용분야가 광범위 해지고 있다. 그에 따라 flexible device에 대한 요구 또한 지속적으로 증가하고 있다. 이러한 이유로 flexible DSSC 제작을 위해 저온소성용 TiO2 paste의 개발이 필요하다. 본 연구에서 TTIP(Titanium isopropoxide)의 몰 비율을 변화시켜 첨가한 저온소성용 TiO2 paste를 제조한 후 DSSC를 제작하여 특성을 비교하였다. 그 결과 TiO2 paste에 TTIP를 0.5 mol의 비율로 첨가하여 제작된 DSSC 단위 셀에서 입자간의 연결성 개선으로 가장 높은 개방전압, 단락전류, fill factor가 측정되었으며, 가장 높은 4.148%의 효율을 나타내었다.

염료감응태양전지의 광학특성분석을 통한 건축창호 적용가능성 평가 연구

심세라(Sim Se-Ra),윤종호(Yoon Jong-Ho),정선영(Jeong Seon-Yeong),백남춘(Baek Nam-Choon) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.3

It can gain both the electric energy production and disperse of light at the same time if DSSC is applied in the building as window system. It means to help facade design and to be used in lighting, heating, cooling energy directly by applicating DSSC BIPV window that is possible to daylighting and materialization of color. For this, optical characteristics analysis that is basic step must take precedence. So, basic databases of DSSC are builded and optical performances according to the double and triple glazing are evaluated by analyzing spectral data of various colored DSSC. As a result, Green④ has the highest visible transmittance that is 28.8%, and Blue③ has the lowest that is 0.3%. And, in case of optical performance of Green④ depending on the incidence angle, SHGC and Tsol are decreased sharply from more than 60°. Finally, It is judged that Red④, Green①, ④, Blue④ are suitable for application in office building because visible transmittance is high and solar heat gain coefficient is low relatively in spite of composing to double and triple glazing.

TTIP가 첨가된 저온소성용 TiO₂ Paste를 이용한 DSSC의 효율 특성

권성열,심창수,양욱,Kwon, Sung Yeol,Sim, Chang Soo,Yang, Wook 한국전기전자재료학회 2019 전기전자재료학회논문지 Vol.32 No.1

Recently, the application field of solar panels is increasing. Accordingly, the demand for flexible devices is also steadily increasing. It is therefore necessary to develop $TiO_2$ paste for low-temperature annealing for flexible DSSC fabrication. In this study, the $TiO_2$ paste for low-temperature annealing with varying molar ratio of titanium isopropoxide (TTIP) was prepared, and DSSC was fabricated and its characteristics were compared. As a result, there was no deformation of the particles on the surface in the SEM data. However, the highest open circuit voltage, short circuit current, and fill factor were measured in the DSSC unit cell prepared by adding 0.5 mol of TTIP to the $TiO_2$ paste, and the highest efficiency was 4.148%.

Alumina titanium oxide를 이용한 염료감응 태양전지의 효율평가

박민규,강미숙 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1

최근 화석연료의 고갈에 따라 수소에너지, 태양에너지, 풍력 등과 같은 대체 에너지원 개발이 시급한 상황 속에서 신재생 에너지인 태양에너지의 개발이 기대되고 있다. 특히 가격이 저렴하고 다양한 디자인이 가능한 차세대 염료 감응 형 태양전지(Dye-sensitized solar cells; DSSC)가 주목을 받고 있다. 이전까지는 n-type DSSC 중심으로 연구가 진행되어 왔지만 최근에는 p-type DSSC가 많은 관심의 대상이 되고 있다. p-type DSSC의 소재로써 Alumina titanium oxide를 사용하여 n-type과 비교하여 구조적으로 유기염료와의 흡착능력을 평가하였다. Solvothermal법을 이용하여 알루미늄의 무게비율을 다르게 두어 합성하였고, 서로 다른 온도로 만들어진 DSSC의 효율을 비교하였다. 합성된 Alumina titanium oxide를 XRD, UV-visible, SEM, CV를 통해 물리화학적 특성을 분석하였으며, IPCE, impedance를 측정을 통해 DSSC의 성능과 전기화학적 특성 관계를 평가하였다.

염료감응태양전지의 투과율에 따른 채광성능 및 현휘지수 분석을 통한 적정창면적비에 대한 연구

오명환(Oh Myung-Hwan),심세라(Sim Se-Ra),이철성(Lee Chul-Sung),진경일(Chin Kyung-Il),윤종호(Yoon Jong-Ho) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.2009 No.11월

It is more necessary to consider the various factors for developmenting visible PV module of alternative window than traditional PV module. It must have sufficient performance which is Tvis, daylighting, daylight factor, glare index. so that more needs to consider suitable plan and total evaluated technology. Under the this background. For using commonly a combination BIPV module system and Daylinghting that can alternative architectural window, our goal on this study is drawing proper window area ratio as the window by analyzing lighting performance and glare index depending on transmittance of DSSC. On this study, we drew the result about window area ratio that can apply in the building when applying DSSC in the window. In situation that window is alternated as curtain wall in atrium that has big Widow area, if applying red 15.8% DSSC of low transmittance, it is expect to proper because it is suitable illumination standard and doesn't occur a discomfort glare. In case of office, we propose to apply red 33.2% or blue 35.2% DSSC of high transmittance for no affecting lighting load. we expect to contribute to select proper and effective window when applying the window in the building by drawing the window area ratio that can apply in thee building depending on transmittance of DSSC and offering the glare index data

조명제어방식에 따른 DSSC BIPV 창호 적용 건물 에너지 성능 분석

김남현(Kim, Nam Hyeon),현지연(Hyun, Ji Yeon),박보랑(Park, Bo Rang),최은지(Choi, Eun Ji),문진우(Moon, Jin Woo) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2

The purpose of this study is to analyze the cooling, heating, lighting energy consumption, and solar cell generation performance of buildings with DSSC BIPV windows by applying various lighting control methods. Using computer simulations, three types of windows were compared: Low-E, DSSC-R and DSSC-Y. As a result, the DSSC windows showed a higher energy consumption than the Low-e window due to its low VLT value despite its own power production, and all three window types showed the lowest energy consumption in the Linear/Off control method. Based on this study, continuous research on improving VLT and Solar Cell’s self-generation efficiency should be conducted in order to increase the utilization of DSSC BIPV windows.