Enhanced‐Light‐Harvesting Amphiphilic Ruthenium Dye for Efficient Solid‐State Dye‐Sensitized Solar Cells

Wang, Mingkui; Moon, Soo‐Jin; Zhang, Zejie; Formal, Florian Le; Cevey-Ha, Ngoc-Lê; Humphry‐Baker, Robin; Grätzel, Carole; Wang, Peng; Zakeeruddin, Shaik M.; Grätzel, Michaël

doi:10.1002/adfm.200902396

Cited by 74 publications

(57 citation statements)

References 47 publications

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“…DSSC provides an efficient source of renewable energy, environmentally friendly, and quite economical [8]. In the DSSC cells, the properties of components such as the sensitizer absorption spectra (UV-Vis spectra) [9] and redox properties [10] play an important role in the photovoltaic performance of DSSC cells.…”

Section: Introductionmentioning

confidence: 99%

A DFT and TDDFT Study of PCM Effect on N3 Dye Absorption in Ethanol Solution

Sundari

Martoprawiro

Ivansyah

2017

J. Phys.: Conf. Ser.

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[Ru(H 2 dcbpy) 2 (SCN) 2 ], known as N3 dye, one of the best sensitizer for DSSC, was the focus of this research. All calculations were carried out with Gaussian03, using B3LYP hybrid functional DFT and TDDFT for ground state geometry optimization and excited states calculations respectively. Basis setused in all calculations was 3-21G* for all elements. Polarized Continuum Model was used for modelling the complex in ethanol solution. Combination of 3-21G* basis set with PCM in N3 dye calculation achieve the better approach regarding to experimental absorption spectra. The last two maximum absorption peaks dominated by charge transfer excitation are red shifted in ethanol solution with respect to the gas phase. Electronic polarization between complex and solvent caused the structure to relax, permitting a greater charge separation. IntroductionSince founded in 1990s, dye-sensitized solar cell (DSSC) has attracted many researchers' attention and the number of publication related to this research topic increasing quite rapidly in recent years. DSSC attracts many interests because this new kind of molecular solar cell achieved lower cost-efficiency ratio than the first and second generation solar cell, moreover, the development of DSSC still have wide area to be investigated in order to achieve higher efficiency while maintaining the low cost production [1]. Many research subtopics arises from DSSC investigation, such as finding new sensitizer, new semiconductor, new electrolyte system, electrolyte additives, controlling the semiconductor pore size, etc., both experimentally and computationally [2][3][4][5][6][7].DSSC is a solar cell that employed a dye (usually an organic or metal complex molecule) as a photon catcher, called sensitizer. DSSC provides an efficient source of renewable energy, environmentally friendly, and quite economical [8]. In the DSSC cells, the properties of components such as the sensitizer absorption spectra (UV-Vis spectra) [9] and redox properties [10] play an important role in the photovoltaic performance of DSSC cells. Solar energy absorbed by the sensitizer is used to inject electrons into the semiconductor photoanode then transferred to the conductor part. Hence, sensitizer material has a critical influence to the overall cell efficiency.One of the best sensitizerscomes from ruthenium polypyridyl complexes and its derivatives, such as N3 dye and black dye [11]. N3 dye is a famous name for dithiocyanatobis(2,2-bipyridine-4,4-

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Section: Introductionmentioning

confidence: 99%

A DFT and TDDFT Study of PCM Effect on N3 Dye Absorption in Ethanol Solution

Sundari

Martoprawiro

Ivansyah

2017

J. Phys.: Conf. Ser.

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“…同条件下对应器件的光电转换效率皆高于 N3 染料, 这主要归因于摩尔消光系数增强所致的光电流密度提高. 类似结构的 Ru-3 也被应用于固体染料敏化太阳能电池, 相对于不带噻吩基团但结构相似的 Ru-4, 光电转化效率提高了 55% [23] . 另外, 无硫氰根 Ru-5 中, 烷基噻吩官能团的引进, 也使得染料在 400～600 nm 区间内摩尔消光系数得到很大的提高, 以其制备的光电池短路电流密度和开路电压都增大, 效率优于 N719 [24] .…”

Section: 钌染料结构修饰unclassified

Recent Advances of Novel Designs of Dyes for Dye Sensitized Solar Cells

He¹,

Chen²,

Wang³

et al. 2012

Chin. J. Org. Chem.

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“…As shown in Figure 4g, APCE values of the device remained about 60%, which were as high as that of the control SLG/Z907/TiO 2 device ( Figure S11d, Supporting Information) and 63% APCE value for Z907-based solid-state dye-sensitized solar cell reported in the literature. [47] Therefore, the Z907/SLG/ TiO 2 heterointerface can be used for effectively separating and collecting photoexcited carriers for photoelectric conversion.…”

Section: Wwwadvelectronicmatdementioning

confidence: 99%

High‐Efficiency Photovoltaic Conversion at Selective Electron Tunneling Heterointerfaces

Jia

Guan

et al. 2017

Adv Elect Materials

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particular, highly efficient photogenerated electron-hole pair separation, transport, and collection at the heterointerface are the key to achieve high photon-to-current conversion efficiency for photovoltaic devices. [12][13][14][15] Therefore, interface engineering was widely applied to control the photoinduced charge transport processes at the heterointerface for improving the performance of photovoltaic devices. [16][17][18][19] Recently, we discovered an ipsilateral selective electron tunneling (ISET) mechanism, which can be used to effectively separate photoinduced electron-hole pair at the heterointerface. [20,21] Specifically, when photoactive materials are assembled on the outside surface of single-layer graphene (SLG)/TiO 2 , Schottky diode, photoexcited electrons, as well as holes produced from the photoactive materials transport along the same direction to SLG, whereas only electron can further inject into the TiO 2 layer, thus realizing photogenerated electron-hole pair separation at the Schottky interface. With acridine orange (AO) dye as a model photoactive material, ≈86.8% photocarriers separation/collection efficiency was realized at the AO/SLG/ TiO 2 interface. Therefore, such an ISET effect at the heterointerface has great potential to be applied for efficient photovoltaic conversion.Due to a highly photoactive and unique amphiphilic structure, Z907 ruthenium molecules were widely used as the dye sensitizer in all-solid-state dye-sensitized solar cells. [22] In this work, Z907 molecules were chosen as the photoactive material to construct a Z907/SLG/TiO 2 ternary interface. As shown in Figure 1a, the photoexcited electrons in Z907 molecules are expected to tunnel across SLG and ballistically inject into the conductance band (CB) of the TiO 2 semiconductor layer, while photoexcited holes in Z907 molecules can only transport to the SLG semimetal layer. After that, the electron and hole are collected by the TiO 2 layer and the SLG layer, respectively, and further transport to the outside circuit for photoelectric conversion. Based on such an ISET mechanism, the electron transparency of the graphene layer is crucial for the high-efficiency photovoltaic conversion in ISET-based photovoltaic devices. Considering the fact that the electron transparency decreases with increasing the thickness of graphene, [23] single-layer graphene was chosen to construct the ISET-based heterointerface. With such an ISET-based heterointerface, we investigated the photoinduced carrier dynamic processes and photoelectric conversion performances at the heterointerface.Effectively controlling photoinduced charge transport at the heterointerface is of crucial importance for improving the performance of photovoltaic devices. On the basis of an ipsilateral selective electron tunneling (ISET) mechanism, here this study investigates photoinduced charge transport and photovoltaic conversion at a simplified dye/single-layer graphene (SLG)/TiO 2 ternary interface. With an amphiphilic Z907 molecule as the model dye, the photoexcit...

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Enhanced‐Light‐Harvesting Amphiphilic Ruthenium Dye for Efficient Solid‐State Dye‐Sensitized Solar Cells

Cited by 74 publications

References 47 publications

A DFT and TDDFT Study of PCM Effect on N3 Dye Absorption in Ethanol Solution

A DFT and TDDFT Study of PCM Effect on N3 Dye Absorption in Ethanol Solution

Recent Advances of Novel Designs of Dyes for Dye Sensitized Solar Cells

High‐Efficiency Photovoltaic Conversion at Selective Electron Tunneling Heterointerfaces

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