KR20230090280A - Dye-sensitized Solar Cells Comprising UV selectively absorbing Dyes Featuring a Cinnamic Acid - Google Patents
Dye-sensitized Solar Cells Comprising UV selectively absorbing Dyes Featuring a Cinnamic Acid Download PDFInfo
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- 125000000217 alkyl group Chemical group 0.000 description 6
- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 6
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- 150000001336 alkenes Chemical class 0.000 description 2
- 150000001345 alkine derivatives Chemical group 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229920003182 Surlyn® Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
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- 125000001931 aliphatic group Chemical group 0.000 description 1
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- 230000008033 biological extinction Effects 0.000 description 1
- 239000001045 blue dye Substances 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
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- 230000002165 photosensitisation Effects 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
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- 239000011148 porous material Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2059—Light-sensitive devices comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B61/00—Dyes of natural origin prepared from natural sources, e.g. vegetable sources
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/542—Dye sensitized solar cells
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- Photovoltaic Devices (AREA)
Abstract
Description
본 발명은 계피산 기반의 자외선 영역 선택적 흡수 염료를 포함하는 염료 감응형 태양전지에 관한 것으로, 상세하게는 자외선 영역을 선택적으로 흡수하는 trans-계피산 기반의 자외선 영역 선택적 흡수 염료를 포함하여 가시광선 투과율이 높아 투명하고 자외선 흡수율이 높아 광전변환 효율이 높은 염료 감응형 태양전지에 관한 것이다. The present invention relates to a dye-sensitized solar cell including a cinnamic acid-based UV region-selective absorption dye, and more particularly, to a dye-sensitized solar cell including a trans-cinnamic acid-based UV region-selective absorption dye that selectively absorbs an ultraviolet region, and has visible light transmittance. The present invention relates to a dye-sensitized solar cell that is highly transparent and has high photoelectric conversion efficiency due to high ultraviolet absorbance.
염료 감응형 태양전지는 태양광 에너지를 흡수하여 전자-홀 쌍(electron-hole pair)을 생성하는 메커니즘으로, 감광성 염료 분자 및 생성된 전자를 전달하는 전이금속 산화물을 주된 구성 재료로 하는데, 기존의 실리콘 태양전지에 비해 제조 단가가 저렴하고, 다양한 색상 구현이 가능하며 반투명한 특성으로 인해 건물 외벽 유리창이나 유리 온실 등에 응용이 가능하다는 이점이 있다.A dye-sensitized solar cell is a mechanism that generates an electron-hole pair by absorbing sunlight energy, and uses photosensitive dye molecules and a transition metal oxide that transfers generated electrons as main components. Compared to silicon solar cells, the manufacturing cost is low, various colors can be implemented, and due to the translucent property, it can be applied to glass windows on the outer walls of buildings or glass greenhouses.
이러한 염료 감응형 태양전지는 감광성 염료(photosensitizing dye)가 안정성과 광전변환 효율을 결정하는 중요 요인으로, 적용하는 대상에 적합한 다양한 색을 가지는 염료의 개발과 함께, 태양전지의 광전변환 효율 등을 높이려는 연구가 진행되고 있다.In such a dye-sensitized solar cell, photosensitizing dye is an important factor in determining stability and photoelectric conversion efficiency. Along with the development of dyes having various colors suitable for the target to be applied, the photoelectric conversion efficiency of the solar cell can be improved. research is in progress.
예를 들어, 한국 등록특허 제10-2335394호는 다이케토피롤로피 기반의 유기 청색염료를 이용하여 우수한 광전변환 효율을 가지는 염료 감응형 태양전지에 관한 것이다. 다만 상기 염료는 장파장 가시광선 영역 일부와 근적외선 영역을 흡수하여 청색을 나타내므로 건물 외벽 유리창이나 유리 온실 등 적용대상이 한정될 수 있다는 문제가 있다.For example, Korean Patent Registration No. 10-2335394 relates to a dye-sensitized solar cell having excellent photoelectric conversion efficiency using a diketopyrrolop-based organic blue dye. However, since the dye absorbs a part of the long-wavelength visible ray region and a near-infrared ray region to show a blue color, there is a problem that the application target such as a window on the outer wall of a building or a glass greenhouse may be limited.
최근에는 가시적으로 투명하여 무색인 염료 감응형 태양전지를 통해 시각적 편안함을 추구하면서도 에너지를 생산하기 위해 자외선 영역 및/또는 근적외선 영역만을 선택적으로 포집하는 염료를 개발하기 위한 노력이 있다. 그러나 종래 근적외선 영역을 선택적으로 포집하는 염료는 장파장 가시광 영역의 일부를 흡수하여 시각적으로 주로 청색을 나타낸 반면, 자외선 영역만을 선택적으로 흡수하여 가시광 영역에서 무색을 나타내면서 광전변환 효율이 높은 염료는 보고된 바가 없었다. Recently, efforts have been made to develop a dye that selectively captures only the ultraviolet region and/or the near infrared region in order to produce energy while pursuing visual comfort through a dye-sensitized solar cell that is visually transparent and colorless. However, conventional dyes that selectively capture the near-infrared region absorb part of the long-wavelength visible light region and visually show mainly blue color, whereas dyes with high photoelectric conversion efficiency while selectively absorbing only the ultraviolet region and showing colorlessness in the visible region have been reported. There was no
한국등록특허 제10-2335394호Korean Patent Registration No. 10-2335394
본 발명은 상기와 같은 종래기술의 문제점과 과거로부터 요청되어온 기술적 과제를 해결하는 것을 목적으로 한다.An object of the present invention is to solve the problems of the prior art and the technical problems that have been requested from the past.
본 발명의 목적은 자외선 영역을 선택적으로 흡수하는 계피산 기반의 자외선 영역 선택적 흡수 염료를 포함하여 우수한 광전변환 효율을 가지는 염료 감응형 태양전지를 제공하는 것이다.An object of the present invention is to provide a dye-sensitized solar cell having excellent photoelectric conversion efficiency, including a cinnamic acid-based dye that selectively absorbs ultraviolet rays.
본 발명은 하기 화학식 (1)로 표시되는 계피산 기반의 자외선 영역 선택적 흡수 염료를 포함하는 염료 감응형 태양전지를 제공한다.The present invention provides a dye-sensitized solar cell including a cinnamic acid-based UV region-selective absorption dye represented by Formula (1) below.
상기 화학식 (1)에서, X 및 Y는 각각 독립적으로 H, 히드록시기, 할로겐 원소, C1-C5 알킬 및 C1-C5 알콕시로 이루어진 군에서 선택되는 하나 이상이다.In Formula (1), X and Y are each independently one or more selected from the group consisting of H, a hydroxyl group, a halogen element, C1-C5 alkyl and C1-C5 alkoxy.
상기 X는 H 및 히드록시기로 이루어진 군에서 선택되는 하나 이상일 수 있다. The X may be one or more selected from the group consisting of H and a hydroxyl group.
상기 Y는 H, 히드록시기 및 C1-C3 알콕시로 이루어진 군에서 선택되는 하나 이상일 수 있다.Y may be one or more selected from the group consisting of H, a hydroxyl group, and C1-C3 alkoxy.
상기 화학식 (1)의 염료는 하기 화학식 (1-1) 내지 화학식 (1-3)으로 이루어진 군에선 선택되는 하나 이상일 수 있다.The dye of Chemical Formula (1) may be one or more selected from the group consisting of Chemical Formulas (1-1) to Chemical Formulas (1-3) below.
상기 염료 감응형 전지는 태양 조명에서 광전변환 효율은 0.15 내지 0.5%이며 UV-A 조명에서 광전변환 효율은 3 내지 5%일 수 있다.The dye-sensitized cell may have a photoelectric conversion efficiency of 0.15 to 0.5% under solar lighting and a photoelectric conversion efficiency of 3 to 5% under UV-A lighting.
본 발명에 따른 계피산 기반의 자외선 영역 선택적 흡수 염료는 자외선 영역만을 선택적으로 흡수하기 때문에 가시광선 투과율이 매우 높아, 이를 이용하여 가시적으로 투명하면서 광전변환 효율(power-conversion efficiency)이 우수하고 자외선에 높은 내구성을 가지는 염료 감응형 태양전지를 제조할 수 있다.The cinnamic acid-based ultraviolet region selective absorption dye according to the present invention selectively absorbs only the ultraviolet region, so the visible light transmittance is very high. A dye-sensitized solar cell having durability can be manufactured.
도 1(a)은 실시예 1 내지 3, 비교예 1에서 사용한 염료의 UV-vis 흡광 스펙트럼,도 1(b)는 상기 염료-TiO2 착물의 UV-vis 흡광 스펙트럼이다
도 2(a)은 실시예 1 내지 3, 비교예 1에서 사용한 염료의 UV-vis 흡광 스펙트럼이고, 도 2(b)는 상기 염료-TiO2 착물의 UV-vis 흡광 스펙트럼이다; 및
도 3(a)은 실시예 1 내지 3, 비교예 1의 투과율(transmittance) 스펙트럼이고, 도 3(b)는 상기 염료-TiO2 착물의 투과율(transmittance) 스펙트럼이다.1(a) is a UV-vis absorption spectrum of the dyes used in Examples 1 to 3 and Comparative Example 1, and FIG. 1(b) is a UV-vis absorption spectrum of the dye-TiO 2 complex.
2(a) is a UV-vis absorption spectrum of the dye used in Examples 1 to 3 and Comparative Example 1, and FIG. 2(b) is a UV-vis absorption spectrum of the dye-TiO 2 complex; and
3(a) is a transmittance spectrum of Examples 1 to 3 and Comparative Example 1, and FIG. 3(b) is a transmittance spectrum of the dye-TiO 2 complex.
본 발명은 하기 화학식 (1)로 표시되는 계피산 기반의 자외선 영역 선택적 흡수 염료를 포함하는, 염료 감응형 태양전지를 제공한다.The present invention provides a dye-sensitized solar cell including a cinnamic acid-based ultraviolet region-selective absorption dye represented by Formula (1) below.
상기 화학식 (1)에서,In the above formula (1),
X 및 Y는 각각 독립적으로 H, 히드록시기, 할로겐 원소, C1-C5 알킬 및 C1-C5 알콕시로 이루어진 군에서 선택되는 하나 이상이다.X and Y are each independently one or more selected from the group consisting of H, a hydroxyl group, a halogen element, C1-C5 alkyl and C1-C5 alkoxy.
한편, 본 명세서의 용어를 이하 설명하기로 한다.Meanwhile, terms in this specification will be described below.
용어 "할로겐 원소"는 주기율표의 17족에 속하는 원소들로, 상세하게는 플루오르, 염소, 브롬, 요오드일 수 있다.The term "halogen element" refers to elements belonging to group 17 of the periodic table, and may be specifically fluorine, chlorine, bromine, and iodine.
용어 "알킬"은 지방족 탄화수소 그룹을 의미한다. 본 발명에서 알킬은 어떠한 알켄이나 알킨 부위를 포함하고 있지 않음을 의미하는 "포화 알킬(saturated alkyl)"과, 적어도 하나의 알켄 또는 알킨 부위를 포함하고 있음을 의미하는 "불포화 알킬(unsaturated alkyl)"을 모두 포함하는 개념으로 사용되고 있으며, 상세하게는 "포화 알킬"일 수 있다. 상기 알킬은 분지형, 직쇄형 또는 환형을 포함할 수 있고, 또한 구조 이성질체를 포함하므로, 예를 들어, C3 알킬의 경우, 프로필, 이소 프로필을 의미할 수 있다The term "alkyl" refers to an aliphatic hydrocarbon group. In the present invention, "alkyl" means that it does not contain any alkene or alkyne moiety, and "unsaturated alkyl" means that it contains at least one alkene or alkyne moiety. It is used as a concept including all, and in detail, it may be "saturated alkyl". The alkyl may include branched, straight-chain or cyclic forms, and also includes structural isomers, so, for example, C3 alkyl may mean propyl or isopropyl.
용어 "알콕시"는 상기 알킬이 -O-에 의해 연결된 상태에서 -OR을 의미한다.The term "alkoxy" means -OR where said alkyl is connected by -O-.
본 발명에 따른 계피산 기반의 자외선 영역 선택적 흡수 염료는 이하 살펴보는 바와 같이, UVA(315-400 nm)의 자외선 영역을 선택적으로 흡수하나 가시광선 영역은 거의 흡수하지 않아 가시광선 영역의 투과율이 높으므로, 이를 이용하여 가시적으로 투명하고 무색을 나타내는 염료 감응형 태양전지를 제조할 수 있다. 이러한 태양전지는 자외선에 높은 내구성을 가진다. As described below, the cinnamic acid-based UV region-selective absorbing dye according to the present invention selectively absorbs UVA (315-400 nm) ultraviolet regions, but does not absorb much of the visible region, resulting in high transmittance in the visible region. , It is possible to manufacture a dye-sensitized solar cell that is visually transparent and colorless using this. These solar cells have high durability against ultraviolet rays.
동시에, 본 발명에 따른 계피산 기반의 자외선 영역 선택적 흡수 염료는 화학식 (1)로 표시되는 D-π-A(donor-π bridge-acceptor)의 구조적 특징으로 인하여 분자내 전하의 분리 및 전자의 이동이 촉진되므로 높은 광전환효율 및 장기 안정성을 나타내는 염료 감응형 태양전지를 제조할 수 있다. At the same time, the cinnamic acid-based UV region-selective absorption dye according to the present invention is characterized by the structural characteristics of D-π-A (donor-π bridge-acceptor) represented by Formula (1), so that intramolecular charge separation and electron movement are difficult. Therefore, a dye-sensitized solar cell exhibiting high light conversion efficiency and long-term stability can be manufactured.
본 발명에 따른 화학식 (1)로 표시되는 계피산 기반의 자외선 영역 선택적 흡수 염료에서, 상세하게는 trans-계피산 기반의 자외선 영역 선택적 흡수 염료일 수 있다.In the cinnamic acid-based UV region-selective absorption dye represented by Chemical Formula (1) according to the present invention, in detail, it may be a trans-cinnamic acid-based UV region-selective absorption dye.
일 실시예로, 상기 X는 H 및 히드록시기로 이루어진 군에서 선택되는 하나 이상일 수 잇다.In one embodiment, the X may be one or more selected from the group consisting of H and a hydroxyl group.
일 실시예로, 상기 Y는 H, 히드록시기 및 C1-C3 알콕시로 이루어진 군에서 선택되는 하나 이상일 수 있다.In one embodiment, Y may be one or more selected from the group consisting of H, a hydroxyl group, and a C1-C3 alkoxy.
일 실시예로, 상기 자외선 영역 선택적 흡수 염료는 화학식 (1-1) 내지 화학식 (1-3)으로 이루어진 군에선 선택되는 하나 이상일 수 있다.In one embodiment, the UV region selective absorption dye may be at least one selected from the group consisting of Chemical Formulas (1-1) to Chemical Formulas (1-3).
본 발명에 따른 계피산 기반의 자외선 영역 선택적 흡수 염료는 자연에서 풍부하여 손쉽게 추출이 가능하고, 시키미산으로부터 간단하고 효율적으로 합성할 수 있어 저비용 대량생산이 가능하며 친환경적이다.The cinnamic acid-based UV region-selective absorption dye according to the present invention is abundant in nature and can be easily extracted, and can be synthesized simply and efficiently from shikimic acid, enabling low-cost mass production and eco-friendly.
본 발명에 따른 염료 감응형 태양전지는 자외선 영역의 포집 효율이 높은 염료를 담지한 광전극을 포함하여 자외선 영역은 선택적으로 흡수하나 가시광선 흡수율은 낮아 가시적으로 투명하면서 우수한 광전변환 효율(power-conversion efficiency)을 가질 수 있다.The dye-sensitized solar cell according to the present invention includes a photoelectrode containing a dye having high capture efficiency in the ultraviolet region, and selectively absorbs the ultraviolet region but has low visible light absorption, so it is visually transparent and has excellent photoelectric conversion efficiency (power-conversion efficiency). efficiency).
일 실시예료 상기 염료 감응형 전지는 태양 조명에서 광전변환 효율은 0.15 내지 0.5%이며 UV-A 조명에서 광전변환 효율 3 내지 5%일 수 있다.In one embodiment, the dye-sensitized cell may have a photoelectric conversion efficiency of 0.15 to 0.5% under solar lighting and a photoelectric conversion efficiency of 3 to 5% under UV-A lighting.
이하, 본 발명을 실시예를 통해 구체적으로 설명하나, 하기 실시예 및 실험예는 본 발명의 한 형태를 예시한 것에 불과할 뿐이며, 본 발명의 범위가 하기 실시예 및 실험예에 의해 제한되는 것은 아니다.Hereinafter, the present invention will be described in detail through examples, but the following examples and experimental examples are merely illustrative of one form of the present invention, and the scope of the present invention is not limited by the following examples and experimental examples. .
<실시예 1: 카페인산(caffeic acid, CA)><Example 1: Caffeic acid (CA)>
화학식 1-1의 염료를 이용하여 제1전극(광음극) 및 제2전극(대전극)을 대응시켜 봉지하며, 상기 제1전극 및 제2전극 사이에 전해질을 채워 넣어 염료 감응형 태양전지를 제작하였다. 상기 각 전극은 유리 기판 상에 제조하였다. 이 때 상기 제1전극은 이산화티탄(TiO2) 나노입자가 도포된 플루오린 도핑된 주석산화물(Fluorine-doped tin oxide, FTO)로 구성되며, 제2전극은 백금(Pt) 나노입자가 형성된 FTO로 구성되며, 전해질로는 아이오딘 기반의 액체 전해질(솔라로닉스 사 AN-50)을 사용하였다. 봉지 전 제1전극의 TiO2에 화학식 1-1의 염료를 흡착시켜 준비하였다. 상기 제2전극의 특정부위에 전해질 주입을 위한 2개의 구멍을 형성하였다. 그런 다음, 제1전극 및 제2전극 사이에 약 25 μm 두께로 격벽을 배치시키고 열과 압력을 가하여 봉지시켰다. 상기 격벽 재료로는 솔라로닉스(Solaronix) 사의 Surlyn을 사용하였다. 그런 다음, 상기 제2전극 표면에 형성된 미세구멍을 통하여 상기 두 전극 사이의 공간에 전해질 용액을 충진하고 구멍을 밀봉시켜 염료 감응형 태양전지를 제작하였다. The first electrode (photocathode) and the second electrode (counter electrode) are sealed by using the dye of Chemical Formula 1-1, and an electrolyte is filled between the first electrode and the second electrode to form a dye-sensitized solar cell. produced. Each of the above electrodes was prepared on a glass substrate. At this time, the first electrode is composed of fluorine-doped tin oxide (FTO) coated with titanium dioxide (TiO 2 ) nanoparticles, and the second electrode is composed of platinum (Pt) nanoparticles formed FTO , and an iodine-based liquid electrolyte (AN-50 from Solaronics) was used as the electrolyte. It was prepared by adsorbing the dye of Chemical Formula 1-1 to TiO 2 of the first electrode before encapsulation. Two holes for electrolyte injection were formed at a specific portion of the second electrode. Then, a barrier rib with a thickness of about 25 μm was disposed between the first electrode and the second electrode and sealed by applying heat and pressure. Surlyn from Solaronix was used as the barrier rib material. Then, an electrolyte solution was filled in the space between the two electrodes through the micropores formed on the surface of the second electrode, and the pores were sealed to manufacture a dye-sensitized solar cell.
<실시예 2: 페루릭산(ferulic acid, FA)><Example 2: Ferulic acid (FA)>
화학식 1-2의 염료를 화학식 1-1 대신 사용한 것을 제외하고는 실시예 1과 동일한 방법으로 염료 감응형 태양전지를 제작하였다A dye-sensitized solar cell was manufactured in the same manner as in Example 1, except that the dye of Formula 1-2 was used instead of Formula 1-1.
<실시예 3: 파라-쿠마릭산(p-coumaric acid, PA)><Example 3: Para-coumaric acid (p-coumaric acid, PA)>
화학식 1-3의 염료를 화학식 1-1 대신 사용한 것을 제외하고는 실시예 1과 동일한 방법으로 염료 감응형 태양전지를 제작하였다A dye-sensitized solar cell was manufactured in the same manner as in Example 1, except that the dye of Formula 1-3 was used instead of Formula 1-1.
<비교예 1><Comparative Example 1>
화학식 1-1의 염료 대신 TiO2을 사용한 것을 제외하고는 실시예 1과 동일한 방법으로 염료 감응형 태양전지를 제작하였다.A dye-sensitized solar cell was manufactured in the same manner as in Example 1, except that TiO 2 was used instead of the dye of Chemical Formula 1-1.
<실험예 1><Experimental Example 1>
실시예 1, 실시예 2 및 실시예 3에 따른 태양전지에서 각각 사용한 염료의 광학물리학적 특성을 표 1에 나타내었고, 상기 염료의 UV-vis 흡광 스펙트럼은 도 1(a), 상기 염료-TiO2 착물의 UV-vis 흡광 스펙트럼은 도 1(b)에 나타내었다. CA는 화학식 1-1의 카페인산, FA는 화학식 1-2의 페루릭산, PA는 화학식 1-3의 파라-쿠마릭산을 각각 나타낸다. The optical physical properties of the dyes used in the solar cells according to Examples 1, 2, and 3 are shown in Table 1, and the UV-vis absorption spectrum of the dyes is shown in FIG. 1(a), the dye-TiO 2 The UV-vis absorption spectrum of the complex is shown in FIG. 1(b). CA represents caffeic acid of Formula 1-1, FA represents ferric acid of Formula 1-2, and PA represents para-coumaric acid of Formula 1-3, respectively.
(nm)λ max a
(nm)
(M-1cm-1) εb
(M -1 cm -1 )
(nm)λ edge c
(nm)
(상기 표 1에서 a: Absorption maximum in EtOH solutions (10-5 M), b: Molar extinction, calculated using lambert beer's law, c; The onset of absorption spectra).표 1 및 도 1에 따르면, 실시예 1 내지 3에 따른 염료들은 자외선 영역에서 높은 흡수율을 보이는 것을 확인할 수 있다.(In Table 1, a: Absorption maximum in EtOH solutions (10 -5 M), b: Molar extinction, calculated using lambert beer's law, c; The onset of absorption spectra). According to Table 1 and FIG. 1, Example 1 It can be seen that the dyes according to 3 to 3 show high absorption rates in the ultraviolet region.
<실험예 2><Experimental Example 2>
실시예 1에 따른 CA, 실시예 2에 따른 FA, 실시예 3에 따른 PA의 가시광선 투과율, Tvis(380-780 nm)을 표 2에 나타내었고, 상기 염료가 각각 흡착된 제1전극의 투과율(transmittance) 스펙트럼은 도 2(a), 제작된 염료 감응형 태양전지의 투과율(transmittance) 스펙트럼은 도 2(b)에 나타내었다. ISO 9050:2003의 방법을 사용하여 측정하였다.Table 2 shows the visible light transmittance and T vis (380-780 nm) of CA according to Example 1, FA according to Example 2, and PA according to Example 3, respectively. The transmittance spectrum is shown in FIG. 2(a), and the transmittance spectrum of the fabricated dye-sensitized solar cell is shown in FIG. 2(b). It was measured using the method of ISO 9050:2003.
표 2 및 도 2에 따르면, 실시예 1 내지 3에 따른 염료들은 가시광선 영역에서 높은 투과율을 보이고, 이를 이용하여 제작된 태양전지 역시 가시적으로 투명하고 무색을 나타내는 것을 알 수 있다.According to Table 2 and FIG. 2, it can be seen that the dyes according to Examples 1 to 3 exhibit high transmittance in the visible ray region, and the solar cells manufactured using the dyes are also visually transparent and colorless.
<실험예 3><Experimental Example 3>
실시예 1, 실시예 2, 실시예 3, 비교예 1에 따라 제조된 태양전지의 전류밀도-전압(J-V) 특성을 태양 조명(AM 1.5G, 100 mW/cm2), UV-A 조명(365 nm, 115 mW/cm2)에서 측정하고 광전지 특성을 평가하여 표 3 및 도 3에 나타내었다. The current density-voltage (JV) characteristics of the solar cells prepared according to Example 1, Example 2, Example 3, and Comparative Example 1 were measured under solar illumination (AM 1.5G, 100 mW/cm 2 ), UV-A illumination ( 365 nm, 115 mW/cm 2 ), and the photovoltaic characteristics were evaluated and shown in Table 3 and FIG. 3 .
단락 전류 (Jsc) 는 회로가 단락된 상태에서 빛을 받았을 때 나타나는 전류밀도로 빛의 세기, 빛의 파장 영역, 입사광에 의해 여기된 전자와 정공이 손실되지 않고 전지 내부에서 외부 회로 쪽으로 보내지는가에 결정된다. 개방 전압 (Voc)은 회로가 개방된 상태에서 빛을 받았을 때 태양전지의 양단에 형성되는 전위차로써 이 차이가 큰 전해질을 사용하면 높은 개방 전압 값이 얻어진다. 충진률 (FF)은 최대 전력점에서의 전 류밀도와 전압값의 곱 (Jmax x Vmax)을 단락전류와 개방 전압의 곱 (Jsc x Voc)으로 나눈 값이다.The short-circuit current (Jsc) is the current density that appears when the circuit receives light in a short-circuit state. It is decided. The open-circuit voltage (Voc) is a potential difference formed between both ends of the solar cell when light is received with the circuit open, and a high open-circuit voltage value is obtained when an electrolyte having a large difference is used. The fill factor (FF) is the value obtained by dividing the product of the current density and voltage value (Jmax x Vmax) by the product of the short-circuit current and open-circuit voltage (Jsc x Voc) at the maximum power point.
표 3 및 도 3에 따르면, 실시예 1 내지 3에 따른 태양전지는 상대적으로 자외선 영역에서 높은 광전변환 효율을 보이는 것을 확인할 수 있다. According to Table 3 and FIG. 3, it can be seen that the solar cells according to Examples 1 to 3 exhibit relatively high photoelectric conversion efficiency in the ultraviolet region.
Claims (5)
상기 화학식 (1)에서,
X 및 Y는 각각 독립적으로 H, 히드록시기, 할로겐 원소, C1-C5 알킬 및 C1-C5 알콕시로 이루어진 군에서 선택되는 하나 이상이다.A dye-sensitized solar cell comprising a cinnamic acid-based UV region-selective absorbing dye represented by Formula (1) below.
In the above formula (1),
X and Y are each independently one or more selected from the group consisting of H, a hydroxyl group, a halogen element, C1-C5 alkyl and C1-C5 alkoxy.
상기 X는 H 및 히드록시기로 이루어진 군에서 선택되는 하나 이상인, 염료 감응형 태양전지.According to claim 1,
wherein X is at least one selected from the group consisting of H and a hydroxyl group.
상기 Y는 H, 히드록시기 및 C1-C3 알콕시로 이루어진 군에서 선택되는 하나 이상인, 염료 감응형 태양전지.According to claim 1
wherein Y is at least one selected from the group consisting of H, a hydroxyl group, and a C1-C3 alkoxy group.
상기 화학식 (1)의 염료는 하기 화학식 (1-1) 내지 화학식 (1-3)으로 이루어진 군에선 선택되는 하나 이상인, 염료 감응형 태양전지.
The dye of Chemical Formula (1) is at least one selected from the group consisting of Chemical Formulas (1-1) to Chemical Formulas (1-3) below.
상기 염료 감응형 전지는 태양 조명에서 광전변환 효율은 0.15 내지 0.5%이며 UV-A 조명에서 광전변환 효율 3 내지 5%인, 염료 감응형 태양전지.According to claim 1,
The dye-sensitized solar cell has a photoelectric conversion efficiency of 0.15 to 0.5% in solar lighting and a photoelectric conversion efficiency of 3 to 5% in UV-A lighting.
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| KR102335394B1 (en) | 2020-02-20 | 2021-12-03 | 중앙대학교 산학협력단 | Organic Blue Dyes featuring a Diketopyrrolopyrrole, Preparation Method Thereof, and Dye-sensitized Solar Cells Comprising the Same |
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