nanoGe - NFM22 - Traps and Transport Resistance - the Next Frontiers for Stable Organic Solar Cells

Traps and Transport Resistance - the Next Frontiers for Stable Organic Solar Cells

Christopher Wöpke^a, Clemens Göhler^a, Maria Saladina^a, Xiaoyan Du^b^,^c, Li Nian^b^,^d, Christopher Greve^e, Chenhui Zu^f, Kayla Yallum^g, Yvonne Hofstetter^h^,ⁱ, David Becker-Koch^h^,ⁱ, Ning Li^b^,^c^,^j, Thomas Heumüller^b^,^c, Ilya Milekhin^a, Dietrich Zahn^a, Christoph Brabec^b^,^c, Natalie Banerji^g, Yana Vaynzof^h^,ⁱ, Eva Herzig^e, Roderick MacKenzie^k, Carsten Deibel^a

^aChemnitz University of Technology, Institute of Physics, Reichenhainer Straße, 70, Chemnitz, Germany

^bInstitute of Materials for Electronics and Energy Technology (i-MEET), Friedrich-Alexander-Universität Erlangen-Nürnberg, Schloßplatz, 4, Erlangen, Germany

^cHelmholtz Institute Erlangen-Nürnberg for Renewable Energy (HI ERN), Cauerstraße, 1, Erlangen, Germany

^dGuangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Zhong Shan Da Dao Xi, Guang Zhou Shi, China

^eUniversität Bayreuth, Physikalisches Institut, Herzig Group – Dynamik und Strukturbildung, Universitätsstraße, 30, Bayreuth, Germany

^fAdvanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA, United States

^gDepartment of Chemistry and Biochemistry, University of Bern - Switzerland, Freiestrasse, 3, Bern, Switzerland

^hntegrated Center for Applied Photophysics and Photonic Materials, Technische Universit ̈at Dresden, 01069 Dresde, Alemania, Dresde, Germany

ⁱCenter for Advancing Electronics Dresden, Technische Universit ̈at Dresden, 01069 Dresde, Alemania, Dresde, Germany

^jState Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Wu Shan Lu, Guang Zhou Shi, China

^kDepartment of Engineering, Durham University, Lower Mount Joy, South Road, United Kingdom

Materials for Sustainable Development Conference (MATSUS)
Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)

#STAPOS - Stability of perovskite and organic solar cells

Barcelona, Spain, 2022 October 24th - 28th

Organizers: Carsten Deibel and Qiong Wang

Contributed talk, Christopher Wöpke, presentation 155
DOI: https://doi.org/10.29363/nanoge.nfm.2022.155
Publication date: 11th July 2022

With the advent of recent state-of-the-art blend materials, organic solar cells have become competitive to established technologies by achieving power conversion efficiencies of more than 18~\%. On the path to commercialization, device stability is the next challenge needing to be overcome. We researched the degradation of inverted devices of the high-performance material system PM6:Y6 and found two distinct degradation pathways. While the first one is marked by a reduction of short-circuit current and requires presence of both illumination and oxygen, we focused our research on the second one, which is induced thermally and shows losses of open-circuit voltage and fill factor. We find that, while bulk and interface properties remain overall stable, defect state formation is the primary cause for thermal degradation. The increased trap density reduces charge carrier mobility and leads to increased non-radiative recombination limiting the open-circuit voltage. In addition, we find an aging-induced transport resistance to be the cause for the reduced fill factor. Our findings show that device stability could be increased by suppressing trap formation.

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.