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Mohammad Khaja Nazeeruddin

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Related publications (846)

Low temperature crystalline titanium dioxide by atomic layer deposition for dye-sensitized solar cells

Pascal Comte, Michael Graetzel, Mohammad Khaja Nazeeruddin, Aravind Kumar Chandiran, Leo-Philipp Heiniger, Aswani Yella, Morgan Mertens Stefik

Low temperature processing of dye-sensitized solar cells (DSC) is crucial to enable commercialization with low-cost, plastic substrates. Prior studies have focused on mechanical compression of premade particles on plastic or glass substrates, however, this ...

Amer Chemical Soc2013

Near-infrared absorbing unsymmetrical Zn(II) phthalocyanine for dye-sensitized solar cells

Mohammad Khaja Nazeeruddin, Filippo de Angelis

Unsymmetrical Zn phthalocyanine consisting of six S-aryl groups at alpha-positions and a carboxy anchoring group at beta-position has been designed and synthesized for dye-sensitized solar cells (DSCs) applications. The unsymmetrical phthalocyanine has bee ...

Elsevier2013

A Simple Synthetic Route to Obtain Pure Trans-Ruthenium(II) Complexes for Dye-Sensitized Solar Cell Applications

Michael Graetzel, Mohammad Khaja Nazeeruddin, Guido Viscardi, Davide Di Censo, Jun Ho Yum, Filippo de Angelis

We report a facile synthetic route to obtain functionalized quaterpyridine ligand and its trans-dithiocyanato ruthenium complex, based on a microwave-assisted procedure. The ruthenium complex has been purified using a silica chromatographic column by prote ...

Wiley-VCH Verlag Berlin2013

Effect of Interfacial Engineering in Solid-State Nanostructured Sb2S3 Heterojunction Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Lioz Etgar, Thomas Moehl, Takafumi Fukumoto

Wiley-VCH Verlag Berlin2013

Redox properties of cobalt(II) complexes with azole-pyridines

Michael Graetzel, Mohammad Khaja Nazeeruddin

We report nine new homoleptic octahedral cobalt(II) complexes Co((NN)-N-boolean AND)(3) and Co((NNN)-N-boolean AND-N-boolean AND)(2) with bidentate or tridentate azole-pyridine ligands (where azole is 1,2,4-triazole or a substituted pyrazole). ...

Elsevier2013

Sequential deposition as a route to high-performance perovskite-sensitized solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Robin Humphry-Baker, Soo-Jin Moon, Norman Pellet, Julian Burschka, Peng Gao

Following pioneering work(1), solution-processable organic-inorganic hybrid perovskites-such as CH3NH3PbX3 (X = Cl, Br, I)-have attracted attention as light-harvesting materials for mesoscopic solar cells(2-15). So far, the perovskite pigment has been depo ...

Nature Publishing Group2013

Correlating the Lifetime and Fluorine Content of Iridium(III) Emitters in Green Light-Emitting Electrochemical Cells

Mohammad Khaja Nazeeruddin, Julien Edouard Frey

In light-emitting electrochemical cells, the lifetime of the device is intrinsically linked to the stability of the phosphorescent emitter. In this study, we present a series of ionic iridium(III) emitters based on cyclometalating phenylpyridine ligands wh ...

American Chemical Society2013

Molecular Engineering of a Fluorene Donor for Dye-Sensitized Solar Cells

Michael Graetzel, Jacques-Edouard Moser, Mohammad Khaja Nazeeruddin, Robin Humphry-Baker, Joël Teuscher, Ursula Röthlisberger, Ivano Tavernelli, Basile Curchod, Negar Ashari Astani, Aswani Yella, Julien Edouard Frey, Simon Mathew, Lauren Elizabeth Polander

To improve their efficiency beyond the state-of-the-art, D-pi-A dyes must display increased spectral breadth and account for the physical limitations observed in the dye. sensitized solar cells. In particular, they should be designed to control the electro ...

Amer Chemical Soc2013

Engineering of thiocyanate-free Ru(II) sensitizers for high efficiency dye-sensitized solar cells

Michael Graetzel, Jacques-Edouard Moser, Mohammad Khaja Nazeeruddin, Elham Ghadiri, Kuan-Lin Wu, Filippo de Angelis, Shilong Wang

We synthesized a series of Ru(II) metal complexes TFRS-1, -2, -4, -21, -22 and -24 with a single 4,40- dicarboxylic acid-2,20-bipyridine together with two functionalized pyridyl azolate ancillary ligands consisting of pyrazolate or triazolate groups. Both ...

Royal Soc Chemistry2013

Unravelling the Potential for Dithienopyrrole Sensitizers in Dye-Sensitized Solar Cells

Two D−π−A dyes based on the dithieno[3,2-b:2′,3′-d]pyrrole π-bridge (DTP) were synthesized, characterized using UV−vis absorption spectroscopy and electrochemistry, modeled using quantum chemical calculations, and used as sensitizers in dye-sensitized sola ...

Amer Chemical Soc2013

First-Principles Modeling of Mixed Halide Organometal Perovskites for Photovoltaic Applications

Michael Graetzel, Mohammad Khaja Nazeeruddin, Filippo de Angelis

We computationally investigate organometal CH3NH3PbX3 and mixed halide CH3NH3PbI2X perovskites (X = Cl, Br, I), which are key materials for high efficiency solid-state solar cells. CH3NH3PbX3 perovskites exhibited the expected absorption blue shift along t ...

American Chemical Society2013

Bodipy dyes as a potential sentisizer for dye sensitized solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Jun Ho Yum, Magdalena Anna Marszalek

Amer Chemical Soc2013

Pulsed-current versus constant-voltage light-emitting electrochemical cells with trifluoromethyl-substituted cationic iridium(III) complexes

Michael Graetzel, Mohammad Khaja Nazeeruddin, Rosario Scopelliti, Cristina Roldán Carmona

We report on five cationic iridium(III) complexes with cyclometalating 2-(3'-trifluoromethylphenyl)pyridine and a diimine, (C boolean AND N)(2)Ir(N boolean AND N), N boolean AND N = 4,4'-R-2-2,2'-dipyridyl or 4,7-R-2-1,10-phenanthroline (R = H, Me, ...

Royal Society of Chemistry2013

Solid-State Dye-Sensitized Solar Cells Using a Novel Class of Ullazine Dyes as Sensitizers

Michael Graetzel, Mohammad Khaja Nazeeruddin, Robin Humphry-Baker, Amalie Dualeh

Here we present the photovoltaic performance of solid-state dye-sensitized solar cells (DSCs) using a series of ullazine-based metal-free organic sensitizers and spiro-MeOTAD as a hole-transport material. A maximum of 4.95% power conversion efficiency meas ...

Wiley-VCH Verlag Berlin2013

Towards high-performance DPP-based sensitizers for DSC applications

Michael Graetzel, Mohammad Khaja Nazeeruddin, Jun Ho Yum, Thomas Wesley Holcombe, Junghyun Yoon, Kasparas Rakstys, Yongjoo Kim

A novel, asymmetric DPP bridge/core was synthesized and tested in DSC devices. By desymmetrising the DPP core/bridge, a remarkable IPCE of >80% and a maximum power conversion efficiency of 7.7% were achieved. With the use of a wide-bandgap co-sensitizer, 8 ...

Royal Society of Chemistry2012

Colorants, pile solaire sensibilisée aux colorants et son procédé de fabrication

Michael Graetzel, Mohammad Khaja Nazeeruddin

A dyestuff shown by the formula (1), ML 1 L 2 L 3 (1) wherein M represents an element belonging to Group 8 to Group 10 of the long format Periodic Table, L 1 and L 2 individually represent a bidentate ligand shown by the formula (2), L 3 represents a biden ...

2012

Modulating dye E(S+/S*) with efficient heterocyclic nitrogen containing acceptors for DSCs

Michael Graetzel, Mohammad Khaja Nazeeruddin, Aswani Yella

Acceptor motifs based on nitrogen containing heterocycles have been synthesized for use in dye-sensitized solar cells (DSCs). Through the selective addition of nitrogen atoms and increased conjugation of the nitrogen containing heterocycles the excited-sta ...

Royal Society of Chemistry2012

Sub-nanometer Ga2O3 tunnelling layer by atomic layer deposition to achieve 1.1V open-circuit potential in dye-sensitized solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Robin Humphry-Baker, Nicolas Tétreault, Aravind Kumar Chandiran, Chenyi Yi

Herein, we present the first use of a gallium oxide tunnelling layer to significantly reduce electron recombination in dye-sensitized solar cells (DSC). The sub-nanometer coating is achieved using atomic layer deposition (ALD) and leading to a new DSC reco ...

American Chemical Society2012

Symmetric vs. asymmetric squaraines as photosensitisers in mesoscopic injection solar cells: a structure-property relationship study

Michael Graetzel, Mohammad Khaja Nazeeruddin, Guido Viscardi, Davide Di Censo

A symmetric squaraine and its related non-symmetric structure are shown to have comparable efficiencies in DSCs, but with undoubtedly advantages in the low cost and casiness of synthesis for the symmetrical structure. ...

Royal Society of Chemistry2012

Influence of the counter electrode on the photovoltaic performance of dye-sensitized solar cells using a disulfide/thiolate redox electrolyte

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Julian Burschka

Strong scientific interests focus on the investigation of iodine-free redox couples for their application in dye-sensitized solar cells (DSCs). Recently, a disulfide/thiolate-based redox electrolyte has been proposed as a valuable alternative to the conven ...

2012

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