Highly Efficient Sulfur-Doped and Nitrogen and Sulfur Dual-Doped Reduced Graphene Oxide Counter Electrodes for Iodine-Free Dye-Sensitized Solar Cells

Heping Shen^a, Hong Lin^a, Feng Hao^a, Qiang Luo^a, Michael Grätzel^b

^aState Key Laboratory of New Ceramics & Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, P. R. China, China

^bLaboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland, Station 6, CH-1015 Lausanne, Lausanne, Switzerland

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Hong Lin, 152
Publication date: 5th February 2015

Developing metal-free electrocatalysts with both high performance and low cost for the reduction reaction at the cathode of dye-sensitized solar cells (DSCs) is critical for further cost reduction and large-scale implementation of DSCs. Here, sulfur-doped reduced graphene oxide (SRGO) and nitrogen and sulfur dual-doped reduced graphene oxide (NSRGO) were applied as highly efficient metal-free electrocatalysts for DSCs in disulfide/thiolate redox electrolytes. It was found that SRGO and NSRGO exhibited outstanding electrochemical performance toward catalyzing the disulfide/thiolate redox couple. The DSC devices based on SRGO and NSRGO counter electrodes showed power conversion efficiency of 4.23% and 4.73%, respectively. In addition, the obtained SRGO and NSRGO also presented catalytic activity higher than that of the platinum electrodes for Co(bpy)₃^3+/2+ redox mediators. The currently reported SRGO and NSRGO demonstrate not only the attractive feasibility of replacing platinum cathodes with abundant carbon materials for novel iodine-free electrolytes but also that the judicious heteroatom doping of graphene oxide might open promising directions for further cathode candidates for iodine-free DSCs.

nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.

MATSUS

Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.

International Conference on Hybrid and Organic Photovoltaics

International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.

Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics

The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.

International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics

The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.