Publication

Enhanced performance of supported HfO2 counter electrodes for redox couples used in dye-sensitized solar cells

Related publications (35)

Electronic Structures and Catalytic Activities of Niobium Oxides as Electrocatalysts in Liquid-Junction Photovoltaic Devices

Ulf Anders Hagfeldt, Sheng Meng, Sining Yun, Hang Liu

Two types of nanosized niobium oxides and their composites, pseudohexagonal Nb2O5 (TT-Nb2O5), monoclinic NbO2 (M-NbO2), and the coexistence of TT-Nb2O5 and M-NbO2 (TT-Nb2O5/M-NbO2), are successfully synthesized through the urea-metal chloride route, and th ...

WILEY-V C H VERLAG GMBH2019

Illumination Time Dependent Learning in Dye Sensitized Solar Cells

Hoi Nok Tsao

Learning through vision is an essential skill for intelligent machines. In an attempt to implement this highly complex feature at low energy cost, a dye-sensitized solar cell is proposed that learns using illumination time as a cue. Particularly, the devic ...

AMER CHEMICAL SOC2018

An Unsymmetrical, Push-Pull Porphyrazine for Dye-Sensitized Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin

An unsymmetrical, push-pull porphyrazine derivative bearing an isoindole-4-carboxylic acid moiety (TT112) is synthesized and incorporated in a dye-sensitized solar cell (DSSC). The device, which constitutes the first example of a porphyrazine-sensitized so ...

Wiley-V C H Verlag Gmbh2017

Intrinsic Origin of Superior Catalytic Properties of Tungsten-based Catalysts in Dye-sensitized Solar Cells

Ulf Anders Hagfeldt, Sining Yun, Xiao Zhou, Jing Li, Yao Liu

To clarify the intrinsic factor of the superior catalytic activity of tungsten (W)-based catalysts in DSSCs, W-based compounds, including W18O49, W2N, WC, and WO3, were prepared as CEs and tested in I-/I-3(-) redox shuttle. A systematic investigation of th ...

Elsevier2017

ABAB Phthalocyanines: Scaffolds for Building Unprecedented Donor-π-Acceptor Chromophores

Michael Graetzel

Unique donor-π-acceptor phthalocyanines have been synthesized through the asym. functionalization of an ABAB phthalocyanine, crosswise functionalized with two iodine atoms through Pd-catalyzed cross-coupling reactions with adequate electron-donor and ...

2017

Highly effective Co3S4/electrospun-carbon-nanofibers composite counter electrode synthesized with electrospun technique for cobalt redox electrolyte based on dye-sensitized solar cells

Ulf Anders Hagfeldt, Weiwei Zhang

The composite of cobaltosic sulfide/electrospun carbon nanofibers (Co3S4/ECs) with high catalytic activity have been successfully synthesized by combining the versatility of the electrospunning technique and following a hydrothermal synthesis method. And t ...

Elsevier Science Bv2016

Surface Modification of Polymer Counter Electrode for Low Cost Dye-sensitized Solar Cells

Minkyu Son

Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) was already used as a counter electrode material of dye-sensitized solar cells (DSCs) in other previous researches but its low catalytic activity has been a sticking point. Here we repor ...

Pergamon-Elsevier Science Ltd2016

Influence of Ancillary Ligands in Dye-Sensitized Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin

A review. Dye-sensitized solar cells (DSSCs) have motivated many researchers to develop various sensitizers with tailored properties involving anchoring and ancillary ligands. Ancillary ligands carry favorable light-harvesting abilities and are therefore c ...

Amer Chemical Soc2016

Effect of Peripheral Substitution on the Performance of Subphthalocyanines in DSSCs

Michael Graetzel, Mohammad Khaja Nazeeruddin

A series of six new subphthalocyanines (SubPcs) bearing an ethynylcarboxyphenyl anchoring unit and decorated with a variety of substituents at the peripheral position of the macrocycle have been synthesized in order to investigate the effect of the periphe ...

Wiley-V C H Verlag Gmbh2016

Highly effective Pt/MoSi2 composite counter electrode catalyst for dye-sensitized solar cell

Ulf Anders Hagfeldt, Hairun Guo

MoSi2 is introduced into dye-sensitized solar cell (DSC) as counter electrode (CE) catalyst for the first time, and the DSC produces power conversion efficiency (PCE) of 4.87%. To improve the catalytic activity, Pt/MoSi2 composite catalyst is synthesized a ...

2014

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