The combination of a new organic D-n-A dye with different organic hole-transport materials for efficient solid-state dye-sensitized solar cells

Lars Kloo^a, Martin karslsson^a, Peng Liu^a, Lars Kloo^a, Bo Xu^b, Licheng Sun^b, Gerrit Boschloo^c, Nick Vlachopoulos^c, Jinbao Zhang^c

^aApplied Physical Chemistry, Center of Molecular Devices, Department of Chemistry, School of Chemical Science and Engineering, KTH-Royal Institute of Technology, SE-10044 Stockholm, Sweden, stockholm, 0

^bOrganic Chemistry, Center of Molecular Devices, Department of Chemistry, School of Chemical Science and Engineering, KTH-Royal Institute of Technology

^cDepartment of Chemistry-Ångstrom Laboratory, Physical Chemistry, Uppsala University

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, Peng Liu, 101
Publication date: 5th February 2015

A new organic donor-π-acceptor dye, MKA253, has been investigated in ssDSSCs. Devices based on the new MKA253 dye in combination with Spiro-OMeTAD as hole-transport material yield impressive short-circuit currents of up to 12.4 mA/cm2 , and a resulting power conversion efficiency of 6.1%. In comparison with the LEG4 dye, the MKA253 dye shows a broader absorption range and higher IPCE values from the resulting ssDSSC devices. Calculational studies show that the reorganization energy of the MKA253 dye is much lower than that of the LEG4 dye. The lower re-organization energy may favor the hole-hopping process between multi-layers of dyes and also between the dyes and an HTM, resulting more efficient dye regeneration. The compatibility of the specific combinations of HTMs and sensitizers is an essential factor to consider when designing new ssDSSCs. Holeconductor materials based on small molecules have been also investigated in this paper. For the same HTM, the devices based on fluorene donor dyes show much shorter electron lifetimes, compared with ones based on LEG4 dye. For LEG4 dye, the small molecular size of the hole transport material shows similar efficiency of dye regeneration, in comparison with Spiro -OMeTAD. However, the smaller enhance the recombination between the TiO2 film and HTM, resulting shorter electron life-time. For the MKA253 dye, the combination with X1 and X11 indicate an inefficient dye regeneration process as a result of a low thermodynamic driving force. Therefore, energy level alignment is an essential factor to consider when designing highly efficient solid-state dye-sensitized solar cells.

P. Liu, B. Xu, M. Karlsson, J. Zhang, N. Vlachopoulos, G. Boschloo, L. Sun and L. Kloo, Journal of Materials Chemistry A, 2014.

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.