Molecular engineering of organic sensitizers for dye-sensitized solar cell applications

被引：0

作者：

Hagberg, Daniel P. ^{[1
]}

Yum, Jun-Ho ^{[3
]}

Lee, HyoJoong ^{[3
]}

De Angelis, Filippo ^{[4
]}

Marinado, Tannia ^{[2
]}

Karlsson, Karl Martin ^{[1
]}

Humphry-Baker, Robin ^{[3
]}

Sun, Licheng ^{[1
]}

Hagfeldt, Anders ^{[2
]}

Grätzel, Michael ^{[3
]}

Nazeeruddin, Md.K. ^{[3
]}

机构：

[1] Organic Chemistry, Center of Molecular Devices, Royal Institute of Technology, 10044 Stockholm, Sweden

[2] Physical Chemistry, Center of Molecular Devices, Royal Institute of Technology, Teknikringen 30, 10044 Stockholm, Sweden

[3] Laboratory for Photonics and Interfaces, School of Basic Sciences, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland

[4] Istituto CNR di Scienze e Tecnologie Molecolari (ISTM), c/o Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto 8, I-06123, Perugia, Italy

来源：

Journal of the American Chemical Society | 2008年 / 130卷 / 19期

关键词：

Novel unsymmetrical organic sensitizers comprising donor, electron-conducting, and anchoring groups were engineered at a molecular level and synthesized for sensitization of mesoscopic titanium dioxide injection solar cells. The unsymmetrical organic sensitizers 3-(5-(4-(diphenylamino)styryl) thiophen-2-yl)-2-cyanoacrylic acid (D5), 3-(5-bis(4-(diphenylamino)styryl) thiophen-2-yl)-2-cyanoacrylic acid (D7), 5-(4-(bis(4-methoxyphenylamino)styryl) thiophen-2-yl)-2-cyanoacrylic acid (D9), and 3-(5-bis(4,4′- dimethoxydiphenylamino)styryl)thiophen-2-yl)-2-cyanoacrylic acid (D11) anchored onto TiO2 and were tested in dye-sensitized solar cell with a volatile electrolyte. The monochromatic incident photon-to-current conversion efficiency of these sensitizers is above 80%, and D11-sensitized solar cells yield a short-circuit photocurrent density of 13.90 ± 0.2 mA/cm 2, an open-circuit voltage of 740 ± 10 mV, and a fill factor of 0.70 ± 0.02, corresponding to an overall conversion efficiency of 7.20% under standard AM 1.5 sun light. Detailed investigations of these sensitizers reveal that the long electron lifetime is responsible for differences in observed open-circuit potential of the cell. As an alternative to liquid electrolyte cells, a solid-state organic hole transporter is used in combination with the D9 sensitizer, which exhibited an efficiency of 3.25%. Density functional theory/time-dependent density functional theory calculations have been employed to gain insight into the electronic structure and excited states of the investigated species. © 2008 American Chemical Society;

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摘要：

Journal article (JA)

引用

页码：6259 / 6266

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