{"id":1761,"date":"2022-08-11T20:38:48","date_gmt":"2022-08-11T12:38:48","guid":{"rendered":"https:\/\/diau08.lab.nycu.edu.tw\/?p=1761"},"modified":"2022-12-16T17:27:19","modified_gmt":"2022-12-16T09:27:19","slug":"2013%e7%a0%94%e7%a9%b6%e6%88%90%e6%9e%9c","status":"publish","type":"post","link":"https:\/\/diau08.lab.nycu.edu.tw\/en\/2022\/08\/1761\/","title":{"rendered":"2013 Research Results"},"content":{"rendered":"
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Effects of Hydrogen Bonding on Internal Conversion of GFP-like Chromophores. I. The para-Amino Systems<\/strong><\/p>\n\n\n\n

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Simplified scheme for the proposed potential energy surfaces along the t-torsion coordinate for the excited state of p-ABDI in aprotic CH3<\/sub>CN (solid curve) and protic CH3<\/sub>OH (dashed curve) solvents.<\/figcaption><\/figure>\n\n\n\n

To understand the effects of solvent\u2212solute hydrogen bonding (SSHB) on the excited-state dynamics of two GFP-like chromophores, we have determined the quantum yields of fluorescence for the isomerization Z\u2192E (\u03a6ZE<\/sub>) and investigated the fs fluorescence and transient absorption spectra in selected solvents. The behavior in aprotic solvents indicates that the E\u2212Z photo-isomerization adopts a one-bond-flip mechanism through \u03c4 torsion to form a perpendicular species to the ground state. In conjunction with the solvent-independent rapid kinetics for the fluorescence decay and the solvent-dependent slow kinetics for the ground-state recovery, we conclude that the SSHB modifies the potential energy surface for the \u03c4 torsion in a way that the internal conversion occurs with a \u03c4 torsion angle smaller than 90\u00b0.<\/p>\n\n\n\n

* G. J. Huang, C. W. Cheng, H. Y. Hsu, C. Prabhakar, Y. P. Lee, J. S. Yang, E. W.-G. Diau, \u201cEffects of Hydrogen Bonding on Internal Conversion of GFP-like Chromophores. I. The para-Amino Systems\u201d, J. Phys. Chem. B 117<\/strong>, 2695 (2013).<\/p>\n\n\n\n

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Effects of Hydrogen Bonding on Internal Conversion of GFP-like Chromophores. II. The meta-Amino Systems<\/strong><\/p>\n\n\n\n

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Schematic representation of the proposed excited-state relaxation dynamics for m-ABDI in CH3<\/sub>OH.<\/figcaption><\/figure>\n\n\n\n

To rationalize the efficient quenching of the fluorescence and the Z\u2192E photoisomerization of m-ABDI in protic solvents, the femtosecond time-resolved fluorescence and transient absorption spectra of m-ABDI in select solvents were determined. In aprotic solvents, the fluorescence decay lifetimes are consistent with those of transient absorption data. In protic solvents, the fluorescence decays exhibited a biexponential nature. The IR TA results indicated the formation of an intermediate to diminish significantly the barrier of the \uf074 torsion and induce a new competing reaction pathway. The proposed mechanism suggests the efficient fluorescence quenching and the diminished yield for Z\u2192E photoisomerization. The new pathway is likely associated with excited-state proton transfer from the solvent to m-ABDI.<\/p>\n\n\n\n

* C. W. Cheng, G. J. Huang, H. Y. Hsu, C. Prabhakar, Y. P. Lee, J. S. Yang, E. W.-G. Diau, \u201cEffects of Hydrogen Bonding on Internal Conversion of GFP-like Chromophores. II. The meta-Amino Systems\u201d, J. Phys. Chem. B 117<\/strong>, 2705 (2013).<\/p>\n\n\n\n

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Electron Injection and Charge Recombination Kinetics on Performance of Porphyrin-Sensitized Solar Cells: Effects of 4-tert-Butylpyridine Additive<\/strong><\/p>\n\n\n\n

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Femtosecond fluorescence decays of YD12 and YD12CN on thin-film samples<\/figcaption><\/figure>\n\n\n\n

The e\ufb00ects of the 4-tert-butylpyridine (TBP) additive in the electrolyte on photovoltaic performance of two porphyrin sensitizers (YD12 and YD12CN) were examined. Addition of TBP increased the power conversion e\ufb03ciencies for YD12 (from 6.2% to 8.5%) but it led to a significant reduction for YD12CN (from 5.8% to 4.5%); Based on measurements of temporally resolved photoelectric transients of the devices and femtosecond fluorescence decays of thin-film samples, the poor performance of the YD12CN device in the presence of TBP can be understood as being due to the enhanced charge recombination, decreased electron injection, and a lesser extent of inhibition of the intermolecular energy transfer.<\/p>\n\n\n\n

Y.-C. Chang, H.-P. Wu, N. M. Reddy, H.-W. Lee, H.-P. Lu, C.-Y. Yeh and E. W.-G. Diau, \u201cElectron Injection and Charge Recombination Kinetics on Performance of Porphyrin-Sensitized Solar Cells: Effects of 4-tert-Butylpyridine Additive\u201d, Phys. Chem. Chem. Phys <\/em>15<\/strong>, 4651-4655 (2013).<\/p>\n\n\n\n

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Design and Characterization of Heteroleptic Ruthenium Complexes Containing Benzimidazole Ligands for Dye-sensitized Solar Cells<\/strong><\/p>\n\n\n\n

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Molecular structures of RD12 and RD16- RD18<\/figcaption><\/figure>\n\n\n\n

We report herein the design, synthesis and characterization of novel ruthenium complexes (RD16-RD18) containing thiophene-substituted benzimidazole ligands, with the molecular structures modified based on a fluoro-substituted Ru complex (RD12) as promising photosensitizers for highly efficient dye-sensitized solar cells. Measurements of CE and IMVS indicate that thiophene substitution shifts downward the TiO2<\/sub> potential and accelerates charge recombination, but inclusion of a long hexyl chain on the thiophene moiety retards charge recombination to account for the variation of VOC<\/sub> in the series. Only ~2 % performance degradation was observed for both RD12 and RD18 devices, reflecting their excellent durability for future commercialization.<\/p>\n\n\n\n

* W.-K. Huang, H.-P. Wu, P.-L. Lin and E. W.-G. Diau, \u201cDesign and Characterization of Heteroleptic Ruthenium Complexes Containing Benzimidazole Ligands for Dye-sensitized Solar Cells: The Effect of Thiophene and Alkyl Substituents on Photovoltaic Performance\u201d, J. Phys. Chem. C, 117<\/strong>, 2059 (2013)<\/p>\n\n\n\n

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Anatase Titania Single Crystals with Octahedron-Like Morphology for Dye-Sensitized Solar Cells<\/strong><\/p>\n\n\n\n

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varied hydrothermal conditions.<\/figcaption><\/figure>\n\n\n\n

\u5229\u7528\u7c21\u55ae\u7684\u6c34\u71b1\u5408\u6210\u6cd5\uff0d\u7531\u7570\u4e19\u9187\u9226 (TTIP) \u7576\u4f5c\u524d\u9a45\u7269\uff0c\u4e09\u4e59\u9187\u80fa (TEOA) \u7576\u4f5c\u5d4c\u5408\u5291\uff0c\u5728\u542b\u6709\u4e8c\u4e59\u80fa (EDA) \u7684\u6c34\u6eb6\u6db2\u4e2d\u9032\u884c\u6c34\u89e3\u8207\u7e2e\u5408\u53cd\u61c9\uff0c\u85c9\u7531\u6c34\u71b1\u6eab\u5ea6\u8207\u6642\u9593\u7684\u8abf\u63a7\uff0c\u53ef\u4ee5\u7522\u751f\u4e0d\u540c\u5c3a\u5bf8(30 \u81f3 400 \u5948\u7c73)\u7684\u985e\u516b\u9762\u9ad4\u92b3\u9226\u7926\u4e8c\u6c27\u5316\u9226\u5948\u7c73\u6676\u9ad4(HD1 – HD5)\u3002\u5229\u7528 30 \u5948\u7c73 (HD1) \u4e4b\u5948\u7c73\u6676\u9ad4\u4f5c\u70ba\u5143\u4ef6\u4e2d\u7684\u4e3b\u52d5\u5c64\uff0c\u518d\u4ee5 300 \u5948\u7c73 (HD5) \u4e4b\u5948\u7c73\u6676\u9ad4\u4f5c\u70ba\u5143\u4ef6\u4e2d\u7684\u6563\u5c04\u5c64\uff0c\u7d44\u88dd\u6210\u4ee5 N719 \u70ba\u67d3\u6599\u4e4b\u67d3\u6599\u654f\u5316\u592a\u967d\u80fd\u96fb\u6c60\u53ef\u4ee5\u9054\u5230 10.2 % \u4e4b\u5149\u96fb\u8f49\u63db\u6548\u80fd\uff0c\u52dd\u904e\u4ee5\u50b3\u7d71\u7684\u5948\u7c73\u7c92\u5b50 (NP) \u6240\u88fd\u4f5c\u4e4b\u96fb\u6c60\u5143\u4ef6\u3002\u6b64 HD \u7cfb\u5217\u4e4b\u96fb\u6c60\u5143\u4ef6\u5448\u73fe\u51fa\u8f03\u9ad8\u7684\u958b\u8def\u96fb\u58d3 (V<\/em>OC<\/sub>)\uff0c\u9019\u662f\u56e0\u70ba\u55ae\u9846\u6676\u9ad4\u7684\u7d50\u69cb\u4f7fTiO2\u7684\u96fb\u4f4d\u66f4\u8ca0\uff0c\u96fb\u5b50\u7684\u50b3\u905e\u66f4\u70ba\u8fc5\u901f\u6240\u81f4\u3002<\/p>\n\n\n\n

* J.-W. Shiu, C.-M. Lan, Y.-C. Chang, H.-P. Wu, W.-K. Huang and E. W.-G. Diau, \u201cSize-Controlled Anatase Titania Single Crystals with Octahedron-Like Morphology for Dye-Sensitized Solar Cells\u201d, ACS Nano, 6,<\/strong> 10860 (2012).<\/p>\n\n\n\n

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Hybrid Titania Photoanodes with a Nanostructured Multi-layer Configuration for Highly Efficient Dye-sensitized Solar Cells<\/strong><\/p>\n\n\n\n

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The multi-layer configuration and side-view SEM images with efficiency performance of varied multi Titania photoanodes.<\/figcaption><\/figure>\n\n\n\n

To construct a hybrid photoanode containing nanoparticles and nanorods of varied size in a multi-layer (ML) configuration for DSSC, the essence of our ML design is a bi-layer system with additional layers of nanorods of well controlled size inserted between the transparent and the scattering layers to enhance the light-harvesting capability for photosensitizers with small absorptivity, such as Z907. The advantages of one-dimensional nanorods with an improved electron-transport property and an upward shift of the potential band edge; a favorable ML configuration was constructed to have a cascade potential feature for feasible electron transport from long nanorods, normal nanorods to small nanoparticles. Based on the ML system reported herein, we demonstrate how the performance of a Z907 device is improved to attain ~10 %, which is a milestone for its future commercialization.<\/p>\n\n\n\n

* H.-P. Wu, C.-M. Lan, J.-Y. Hu, W.-K. Huang, J.-W. Shiu, Z.-J. Lan, C.-M. Tsai, C.-H. Su and E. W.-G. Diau, \u201cHybrid Titania Photoanodes with a Nanostructured Multi-Layer Configuration for Highly Efficient Dye-sensitized Solar Cells\u201d, J. Phys. Chem. Lett., 4<\/strong>, 1570 (2013).<\/p>","protected":false},"excerpt":{"rendered":"

\u6c2b\u9375\u6548\u61c9\u65bc\u985e\u7da0\u8272\u87a2\u5149\u86cb\u767d\u8cea\u767c\u5149\u5718\u4e4b\u7de9\u89e3\u52d5\u529b\u5b78\u7814\u7a76\uff08<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1761","post","type-post","status-publish","format-standard","hentry","category-research-results"],"_links":{"self":[{"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/posts\/1761","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/comments?post=1761"}],"version-history":[{"count":6,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/posts\/1761\/revisions"}],"predecessor-version":[{"id":2250,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/posts\/1761\/revisions\/2250"}],"wp:attachment":[{"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/media?parent=1761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/categories?post=1761"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/diau08.lab.nycu.edu.tw\/en\/wp-json\/wp\/v2\/tags?post=1761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}