TWI473780B - 光敏染料化合物以及染料敏化太陽能電池 - Google Patents
光敏染料化合物以及染料敏化太陽能電池 Download PDFInfo
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- dye compound
- photosensitive dye
- cyclic hydrocarbon
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- 150000001875 compounds Chemical class 0.000 title claims description 37
- 125000003118 aryl group Chemical group 0.000 claims description 32
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 125000001424 substituent group Chemical group 0.000 claims description 14
- 239000004065 semiconductor Substances 0.000 claims description 10
- 239000003504 photosensitizing agent Substances 0.000 claims description 9
- 125000005842 heteroatom Chemical group 0.000 claims description 8
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 7
- 230000002165 photosensitisation Effects 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 125000006267 biphenyl group Chemical group 0.000 claims description 4
- 125000003668 acetyloxy group Chemical group [H]C([H])([H])C(=O)O[*] 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 125000006575 electron-withdrawing group Chemical group 0.000 claims 3
- 239000000975 dye Substances 0.000 description 42
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 12
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 7
- 239000010408 film Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 125000002178 anthracenyl group Chemical group C1(=CC=CC2=CC3=CC=CC=C3C=C12)* 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 5
- 125000001624 naphthyl group Chemical group 0.000 description 5
- 238000000862 absorption spectrum Methods 0.000 description 4
- 238000004440 column chromatography Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- FPGGTKZVZWFYPV-UHFFFAOYSA-M tetrabutylammonium fluoride Chemical compound [F-].CCCC[N+](CCCC)(CCCC)CCCC FPGGTKZVZWFYPV-UHFFFAOYSA-M 0.000 description 4
- 239000005711 Benzoic acid Substances 0.000 description 3
- WPYMKLBDIGXBTP-UHFFFAOYSA-N Benzoic acid Natural products OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 150000004982 aromatic amines Chemical class 0.000 description 3
- WPYMKLBDIGXBTP-VQEHIDDOSA-N benzoic acid Chemical compound OC(=O)C1=CC=C[13CH]=C1 WPYMKLBDIGXBTP-VQEHIDDOSA-N 0.000 description 3
- 235000010233 benzoic acid Nutrition 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 150000001555 benzenes Chemical class 0.000 description 2
- 239000003574 free electron Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 150000002430 hydrocarbons Chemical group 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000012265 solid product Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- YBYIRNPNPLQARY-UHFFFAOYSA-N 1H-indene Natural products C1=CC=C2CC=CC2=C1 YBYIRNPNPLQARY-UHFFFAOYSA-N 0.000 description 1
- -1 4-hexylphenyl Chemical group 0.000 description 1
- GHICCUXQJBDNRN-UHFFFAOYSA-N 4-iodobenzoic acid Chemical compound OC(=O)C1=CC=C(I)C=C1 GHICCUXQJBDNRN-UHFFFAOYSA-N 0.000 description 1
- ZIRVQSRSPDUEOJ-UHFFFAOYSA-N 9-bromoanthracene Chemical compound C1=CC=C2C(Br)=C(C=CC=C3)C3=CC2=C1 ZIRVQSRSPDUEOJ-UHFFFAOYSA-N 0.000 description 1
- WYZQKQJCFQQKAG-UHFFFAOYSA-N BrC1=C2C=CC=CC2=C(C2=CC=CC=C12)N(C1=CC=C(C=C1)CCCCCC)C1=CC=C(C=C1)CCCCCC Chemical compound BrC1=C2C=CC=CC2=C(C2=CC=CC=C12)N(C1=CC=C(C=C1)CCCCCC)C1=CC=C(C=C1)CCCCCC WYZQKQJCFQQKAG-UHFFFAOYSA-N 0.000 description 1
- QERKGQHZYIZBTN-UHFFFAOYSA-N C(CCCCC)C1=CC=C(C=C1)N(C=1C2=CC=CC=C2C=C2C=CC=CC12)C1=CC=C(C=C1)CCCCCC Chemical compound C(CCCCC)C1=CC=C(C=C1)N(C=1C2=CC=CC=C2C=C2C=CC=CC12)C1=CC=C(C=C1)CCCCCC QERKGQHZYIZBTN-UHFFFAOYSA-N 0.000 description 1
- NDXQDTRWQQOLSR-UHFFFAOYSA-N N,N-bis(4-hexylphenyl)-10-(2-trimethylsilylethynyl)anthracen-9-amine Chemical compound C(CCCCC)C1=CC=C(C=C1)N(C=1C2=CC=CC=C2C(=C2C=CC=CC12)C#C[Si](C)(C)C)C1=CC=C(C=C1)CCCCCC NDXQDTRWQQOLSR-UHFFFAOYSA-N 0.000 description 1
- PCLIMKBDDGJMGD-UHFFFAOYSA-N N-bromosuccinimide Chemical compound BrN1C(=O)CCC1=O PCLIMKBDDGJMGD-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- OILAIQUEIWYQPH-UHFFFAOYSA-N cyclohexane-1,2-dione Chemical compound O=C1CCCCC1=O OILAIQUEIWYQPH-UHFFFAOYSA-N 0.000 description 1
- 125000005594 diketone group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 125000003454 indenyl group Chemical group C1(C=CC2=CC=CC=C12)* 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- 230000001443 photoexcitation Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- CWMFRHBXRUITQE-UHFFFAOYSA-N trimethylsilylacetylene Chemical group C[Si](C)(C)C#C CWMFRHBXRUITQE-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- 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
- C09B1/00—Dyes with anthracene nucleus not condensed with any other ring
-
- 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
- C09B57/00—Other synthetic dyes of known constitution
- C09B57/008—Triarylamine dyes containing no other chromophores
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/652—Cyanine dyes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
-
- 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
-
- 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
- Y02E10/549—Organic PV cells
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- Spectroscopy & Molecular Physics (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Hybrid Cells (AREA)
- Photovoltaic Devices (AREA)
Description
本案關於一種光敏染料化合物,尤指一種適用於光電轉換裝置中的光敏染料化合物。本案亦關於一種染料敏化太陽能電池。
太陽能電池可將自然存在、取之不盡、用之不竭的太陽光轉換成電能,且在產生能量時不會造成汙染,是一種具高價值,值得開發的替代能源。
傳統太陽能電池係以半導體太陽能電池為主,尤其以矽基材太陽能電池為主流,並隨著光電轉換效能與成本上的諸多考量加以逐步改良。即使如此,傳統太陽能電池在光電轉換效率與成本上仍有很大的改善空間,因此學界與業界一方面致力於對原有太陽能架構進行改良,同時也在找尋新的架構以提升效能並降低成本。其中,染料光敏化太陽能電池即為一種可行的選項,其成本甚至可低至傳統矽基材太陽能電池的1/5~1/10,而且不需要如矽基材太陽能電池般須在高溫、真空的環境中製作,其製作條件相對容易。
染料敏化太陽能電池(Dye-Sensitized Solar Cell;DSSC),是一種光化學電池,利用染料系列光敏化劑的光激發效應產生化學反應,進而產生光電流的一種電池。一般而言,染料敏化太陽能電池係由基板、透明導電膜、半導體膜、染料、電解質、以及相對電極等所構成,其發電原理是將特殊的染料吸附在二氧化鈦或氧化鋅等半導體膜上,染料照光後電子會躍遷到激發態,並有機會遷移到半導體上變成自由電子,這些自由電子會經由連接到半導體的導電玻璃或導電塑膠流出,形成電流。染料的另一側是電解質,失去電子的染料分子會從電解質接受電子,恢復至原有的狀態。而一開始從染料流出的電子,則在經過負載後,流到和電解質連接的鉑電極,補充電解質失去的電子,成為完整的迴路。在染料敏化太陽能電池中,光敏染料連接到半導體膜表面的方式,以及光敏染料的結構,都會影響光電轉換效率與電池的穩定性。光敏染料的選擇亦與成本息息相關,甚至攸關太陽能電池的發展潛力。
因此,本案旨在提出一種光敏染料,其可用光電材料,當應用於太陽能電池中時,可在光電轉換效率、電池的穩定性、製成便利性、以及成本考量之間取得平衡,以提昇太陽能電池商業化發展的潛力。
本發明提供一種光敏染料化合物,適用於如染料
敏化太陽能電池的光電轉換裝置中,該光敏染料化合物具有式(I)的結構式:
另一方面,本發明提供一種光敏染料化合物,適用於一光電轉換裝置中,該光敏染料化合物包括:一中心單元,具有一或多個芳香環上具取代基或不具取代基之芳基(Aryl1
);一電子予體單元,具有一具取代基的推電子胺基NR2
R3
,連接至該中心單元的一側,其中(R2
)與(R3
)可為相同或不同的烴基,例如烷基或芳基等,且獨立具有或不具有取代基;一碳碳三鍵單元,連接至該中心單元相對於該電子予體單元的另一側;一電子受體單元,連接於該中心單元與該電子受體單元之間,包括一拉電子基;以及一連接單元,視情況存在於該碳碳三鍵單元與該電子受體單元之間。
在一實施例中,該中心單元包括一或多個芳香環上具取代基或不具取代基之芳基(Aryl1
)。舉例而言,可為選自如下所示的具取代或不具取代的苯基、萘基、蒽基以及其衍生物,如二苯并萘基。
在一實施例中,該電子予體單元的推電子胺基N(R2
)(R3
)中,該等芳基(R2
)與(R3
)係選自具取代或不具取代的苯基、二苯基、蒽基以及其衍生物,可為相同或不同,且獨立具有或不具有取代基。
在一實施例中,該連接單元包括一具取代基或不
具取代基的不飽和脂肪環或芳香環,其係選自具有共軛雙鍵之五員環或六員環或異原子五員環或六員環,其中該異原子為硫、氧及/或氮。
在一實施例中,該電子受體單元的拉電子基係選自乙酸基、不飽和環烴羧基、不飽和環烴羥基、不飽和環烴二羥基、不飽和環烴二羧基、以及不飽和環烴二酮等等,較佳具有共軛雙鍵者,例如一或多芳香環之芳香烴。該環烴基可具取代基或不具取代基,該異原子為硫、氧及/或氮。
本發明亦關於一種染料敏化太陽能電池,包括如前述任一種之光敏染料化合物。
本發明的光敏染料化合物可用於各種應用染料光敏特性進行光電反應的光電轉換裝置,例如染料敏化太陽能電池中。在染料敏化太陽能電池中所使用的光敏染料,需要的條件不只電子會受光激發,還必須照光後電子躍遷的能階可以與半導體膜材料(如二氧化鈦)的能階匹配,如此激發態的電子才會轉移到半導體膜上,形成電流。此外,染料吸光的頻譜範圍也要越寬越好,如此才能吸收較多光能,而提高光電轉換效率。
為達上述要求,本案發明人致力研發出新穎的光敏染料化合物,因此提出一系列有機光敏染料化合物,此系列染料以芳香胺為主結構(arylamine-based),具有如下式(I)的結構:
其中,該光敏染料化合物包括一中心單元,其為一或多個芳香環上具取代基或不具取代基之芳基(Aryl1
);一電子予體(donor)單元,其為一具兩個芳基取代之胺基N(R2
)(R3
),連接至該中心單元的一側,其中(R2
)與(R3
)可為相同或不同的烷基或芳基且獨立具有或不具有取代基;一電子受體(acceptor)單元A,連接至該中心單元的另一側。該電子予體單元與電子受體單元的組合使整體結構中具有推-拉(push-pull)電子特性。此外,該光敏染料更包括一碳碳三鍵單元,串聯於該電子予體單元與該電子受體單元之間,有利於推-拉單元之間的電子耦和,除了增加吸收光譜的寬度外,亦有利於電子轉移,進而提升染料敏化電池之光電轉換效率。
在一實施例中,本發明之芳香胺有機光敏染料化合物可另外包括一連接(linker)單元,連接在該碳碳三鍵單元與該電子受體單元之間,其主要目的在於提供π系統延長的共軛長度,使染料分子的吸收可更加紅位移,同時加寬染料分子的吸收光譜,增加光吸收率,這些都有助於進一步提升光電轉換率。但若在成本、製程等考量之下,連接單元並非必須,在無連接單元存在的情況下,結構將如下式(II)所示:
以下針對式(I)染料化合物中所包含的各單元的具體實例加以說明。
該光敏染料化合物的中心單元(Aryl1
)為一或多個
芳香環上具取代基或不具取代基之芳基,例如其可為具取代或不具取代的苯基、萘基、蒽基或其它具取代或不具取代的苯基、萘基、蒽基的芳基并,如二苯并萘基,或者這些芳基的組合基團。
可實施的具取代或不具取代的苯基、萘基、蒽基、其芳基并的結構舉例但不限制如下:
可實施的具取代或不具取代的苯基、萘基、蒽基、其芳基并的組合基團的結構舉例但不限制如下:
請注意為清楚說明染料分子結構中各單元之間的關係,除了中心單元以外亦呈現出其它相連接的單元,包括碳碳三鍵、D、L、A等單元,其中D代表電子予體單元、L代表連接單元、A代表電子受體單元,這些單元可有多種變化例,將於後續討論。另外,連接單元L可視情況(如成本、製成、光電轉換率等各項要求的平衡考量)選擇引入或不引入。
該光敏染料化合物的電子予體單元N(R2
)(R3
)為一具兩個烴基取代之推電子胺基,較佳者為兩個芳基,例如可為具取代或不具取代的苯基、二苯基、蒽基或其它具取代或不具取代的苯基、二苯基、蒽基的芳基團等,可實施的結構舉例但不限制如下:
請注意以上實例中雖然為了簡化製程的目的,(R2
)和(R3
)選用相同芳基,但在其他因素的考量與平衡之下,例如能隙、吸收光譜、穩定性、成本等,(R2
)和(R3
)亦可為不同芳基、或其他烴基。此外,為完整呈現染料分子結構中各單元的關係,除了電子予體單元以外亦呈現出其它相連接的單元,其中(Aryl1
)代表中心單元、L代表連接單元、A代表電子受體單元,這些單元可有多種變化例,如前述或將於後續討論。另外,連接單元L可視情況選擇引入或不引入。
該光敏染料化合物的連接單元L包括一具取代基或不具取代基的不飽和脂肪環或芳香環,其係選自具有共軛
雙鍵之五員環或六員環或異原子五員環或六員環,其中該異原子為硫、氧及/或氮。可實施的結構舉例但不限制如下:
請注意為完整呈現染料分子結構各單元間的關
係,除了連接單元以外亦呈現出其它相連接的單元,其中D代表電子予體單元、Aryl1
代表中心單元、A代表電子受體單元,這些單元可有多種變化例,如前述或將於後續討論。
該光敏染料化合物的電子受體單元A包括乙酸基、不飽和環烴羧基、不飽和環烴羥基、不飽和環烴二羥基、不飽和環烴二羧基、以及不飽和環烴二酮等等,較佳具有共軛雙鍵者,例如一或多芳香環之芳香烴。該環烴基可具取代基或不具取代基,且可為異原子環,該異原子為硫、氧及/或氮。可實施的結構舉例但不限制如下:
請注意為完整呈現結構態樣,上述結構式表示出染料分子結構各單元連接關係,亦即除了電子受體單元以外亦呈現出其它相連接的單元,例如碳碳三鍵、D、Aryl1
、L,其中D代表電子予體單元、Aryl1
代表中心單元、L代表連接單元,這些單元可有多種變化例,如前所述。另外,連接單元L可視情況選擇引入或不引入。
在以上各種不同中心單元、電子予體單元、電子受體單元、以及視情況存在的連接單元分別與碳碳三鍵所構成不同組合的化合物中,會因所要求性質的不同而有所取捨。例如選擇分子較大的電子予體D與電子受體A有助於加寬染料的吸收光譜;在電子受體A中採用二羥基、二羧基、二酮等雙官能基結構有助於與如二氧化鈦等半導體膜的結合穩定性;簡單的中心單元結構有助於成本的降低與製程的簡易化等等。例如,結構式(III)的化合物4-[N
,N
-雙(4-己基苯基)-10-乙炔基蒽基-9-胺基]苯甲酸(4-[N
,N
-Bis(4-hexylphenyl)-10-ethynylanthracen-9-amino]benzoic acid)在兼顧光電轉換效率、製程容易度、以及成本的諸多考量之下為本發明較佳實施例之一:
為使熟習此技藝之人士可藉由合成方法而得知本發明製程簡易的優勢,以下舉例說明該結構式(III)化合物的合成方法。請注意以下合成方法僅為例舉,本發明染料分子亦可以其他方法加以合成。
先將化合物(IV)(144.4毫克,0.428毫莫耳)和9-溴基蒽(9-bromoanthracene)(100.0毫克,0.389毫莫耳)置於心型瓶抽真空5分鐘,接著把Pd(OAc)2
(0.9毫克,0.004毫莫耳)、P(t
Bu)3
(0.9毫克,0.005毫莫耳)、NaOt
Bu(44.9毫克,0.467毫莫耳)抽真空30分鐘,將甲苯(10.0毫升)加入心型瓶再打入劇烈迴流反應12小時,冷卻後過矽藻土(Celite)除去多餘的鹼,濃縮,管柱層析法純化(使用己烷溶劑),利用冰己烷再結晶可得到螢光黃色固體產物N
,N
-雙(4-己基苯基)蒽基-9-胺N
,N
-Bis(4-hexylphenyl)anthracen-9-amine(式(V))(165.8毫克,83%)。1
H NMR(400MHz,CDCl3
)δ 8.48(s,1H),8.13(d,J
=8.6Hz,2H),8.05(d,J
=8.4Hz,2H),7.40(dddd,J
=9.9,7.8,6.5,1.1Hz,4H),7.00-6.88(m,8H),2.47(t,J
=8.0Hz,4H),1.58-1.48(m,4H),1.36-1.24(m,12H),0.91-0.82(m,6H).13
C NMR(101MHz,CDCl3
)δ 145.7,137.7,135.3,132.8,130.8,128.9,128.8,126.5,125.4,124.6,119.9,35.2,31.7,31.5,29.1,22.6,
14.1.ESI(MS):m/z:Calcd for C38
H43
N:513.8[M]+
Found:513.5。
取化合物(V)(100.0毫克,0.195毫莫耳)加入CH2
Cl2
(5.0毫升)在0℃下攪拌,接著將N-溴代丁二醯亞胺(N-bromosuccinimide;NBS)(38.1毫克,0.214毫莫耳)用CH2
Cl2
(3.0毫升)溶解,緩慢滴入反應,以薄膜色層分析(TLC)片追蹤反應,完成後用丙酮終止反應。濃縮,管柱層析法純化(使用己烷溶劑)可得到螢光黃色固體產物10-溴-N
,N
-雙(4-己基苯基)蒽基-9-胺(10-Bromo-N
,N
-bis(4-hexylphenyl)anthracen-9-amine)(式(VI))(110.7毫克,96%)。1
H NMR(400MHz,CDCl3
)δ 8.59(d,J
=8.9Hz,2H),8.16(d,J
=8.8Hz,2H),7.64-7.53(m,2H),7.46-7.35(m,2H),6.94(s,8H),2.47(t,J
=8.0Hz,4H),1.54-1.47(m,4H),1.35-1.19(m,12H),0.92-0.79(m,6H).13
C NMR(101MHz,CDCl3
)δ 145.5,138.3,135.7,131.7,129.0,128.4,127.2,126.8,125.1,120.0,35.2,31.7,31.4,29.0,22.6,14.1.ESI(MS):m/z:Calcd for C38
H43
N:592.7[M]+
Found:593.4。
取化合物(VI)(100.0毫克,0.169毫莫耳)和Pd(PPh3
)2
Cl2
(11.8毫克,0.017毫莫耳)、CuI(3.3毫克,0.017毫莫耳)抽真空30分鐘,之後將THF/NEt3
(4.0毫升/1.0毫升)用氮氣除水氧10分鐘和(三甲基矽基)乙炔((trimethylsilyl)acetylene)(82.9毫克,0.844毫莫耳),加入迴流反應12小時,冷卻至室溫,濃縮,利用管柱層析法純化(使用己烷溶劑),可得到黃色黏稠產物N
,N
-雙(4-己基苯基)10-(三甲基矽基)蒽基-9-胺(N
,N
-Bis(4-hexylphenyl)-10-(trimethylsilyl)ethynylanthracen-9-amine)(式(VII))(48.4毫克,47%)。1
H NMR(400MHz,CDCl3
)δ 8.72(d,J
=8.7Hz,2H),8.22(d,J
=8.7Hz,2H),7.60(dd,J
=8.0,7.1Hz,2H),7.49-7.40(m,2H),7.02(s,8H),2.54(t,J
=8.0Hz,4H),1.66-1.56(m,4H),1.42-1.31(m,12H),0.98-0.89(m,6H),0.55-0.49(m,9H).13
C NMR(101MHz,CDCl3
)δ145.6,139.0,135.6,134.1,130.4,129.0,127.4,126.7,125.0,120.1,106.9,101.6,35.2,31.7,31.4,29.0,22.6,14.1,0.3.ESI(MS):m/z:Calcd for C43
H51
NSi:610.0[M]+
Found:609.5。
取化合物(VII)(115.7毫克,0.190毫莫耳)溶於THF(3.0毫升),打入四正丁基氟化銨(Tetrabutylammonuium fluoride;TBAF)(248.0毫克,0.948毫莫耳),室溫下反應,以TLC片追蹤,反應完後用乙醚/水萃取,取有機層,以無水MgSO4
除水,濃縮,可得產物(VIII)(100毫克,0.186毫莫耳,98%)。接著將化合物(VIII)、4-碘基苯甲酸(4-iodobenzoicacid)(138.4毫克,0.558毫莫耳)和Pd2
(dba)3
(17.0毫克,0.019毫莫耳)、AsPh3
(56.9毫克,0.186毫莫耳)抽真空4小時,之後將THF/NEt3
(10.0毫升/2.0毫升)用氮氣除水氧10分鐘,加入迴流反應4小時,冷卻至室溫,濃縮,利用管柱層析法純化(CH2
Cl2
:CH3
OH=20:1),利用CH2
Cl2
/CH3
OH再結晶可得到式III的4-[N
,N
-雙(4-己基苯基)-10-乙炔基蒽基-9-胺基]苯甲酸(4-[N
,N
-Bis(4-hexylphenyl)-10-ethynylanthracen-9-amino]benzoic acid)橘紅色固體產物(75.8mg,62%)。1
H NMR(400MHz,CDCl3
)δ 8.69(d,J
=8.8Hz,2H),8.23(d,J
=8.0Hz,2H),8.16(d,J
=8.7Hz,2H),7.88(d,J
=8.1Hz,2H),7.61-7.48(m,2H),7.46-7.34(s,2H),6.95(s,8H),2.48(t,J
=8.0Hz,4H),1.60-1.49
(m,4H),1.38-1.22(m,12H),0.91-0.83(m,6H).13
C NMR(101MHz,CDCl3
)δ 145.6,139.6,135.7,134.0,131.6,130.5,130.4,129.0,127.2,126.9,126.8,125.2,120.1,116.4,100.4,89.9,35.2,31.7,31.5,29.1,22.6,14.1,1.0.ESI(HRMS):m/z:Calcd for C47
H47
NO2
:657.3601[M]+
Found:657.3594。
本發明使用光敏染料化合物的元件具有太陽能電池所需的高電壓特性,不僅高於傳統元件的0.75V,尤其如以下式(III)、(IX)、(X)、(XI)的光敏染料者甚至超過0.8V。
本發明芳香胺有機光敏染料所製得的染料敏化太陽能電池除材料便宜、可在低溫、簡單的製程製作之外,其具備高電壓、可撓性、多彩性與可透光性等特性,應用範圍廣泛。例如透過染料化合物的選擇可具半透明特性,因此可作為玻璃帷幕大樓建材,同時具有遮陽、絕熱及發電功能,在用電量較小的產品上亦有其市場潛力。
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離本發明之精神和範圍內,當可作些許之更動與潤飾,故本發明之保護範圍當視後附之申請專利範圍所界定者為準。
Claims (10)
- 一種光敏染料化合物,適用於一染料敏化太陽能電池的光電轉換裝置中,該光敏染料化合物具有式(I)的結構式:
- 如申請專利範圍第1項所述之光敏染料化合物,其中R2 與R3 係選自具取代或不具取代的苯基、二苯基、蒽基以及其衍生物,可為相同或不同,且獨立具有或不具有取代基。
- 如申請專利範圍第2項所述之光敏染料化合物,其中N(R2 )(R3 )係選自以下結構式之一:
- 如申請專利範圍第1項所述之光敏染料化合物,其中L係選自以下結構式之一:
- 如申請專利範圍第1項所述之光敏染料化合物,其中該拉電子基係選自乙酸基、以及包括不飽和環烴羧基、不飽和環烴羥基、不飽和環烴二羥基、不飽和環烴二羧基、以及不飽和環烴二酮之環烴基,該環烴基可具取代基或不具取代基。
- 如申請專利範圍第5項所述之光敏染料化合物,其中該拉電子基具有共軛雙鍵。
- 如申請專利範圍第5項所述之光敏染料化合物,其中該環烴基為一異原子環烴基,該異原子為硫、氧及/或氮。
- 如申請專利範圍第5項所述之光敏染料化合物,其中該拉電子基係選自以下結構式之一:
- 如申請專利範圍第1項所述之光敏染料化合物,具有如下結構之一:
- 一種染料敏化太陽能電池,包括一種如申請專利範圍第1-9項中任一項所述之光敏染料化合物,塗佈於一半導體膜上作為光敏化劑。
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