Cross-Linking of Doped Organic Semiconductor Interlayers for Organic Solar Cells: Potential and Challenges
Source abstract
Abstract
Solution-processable interlayers are important building blocks for the commercialization of organic electronic devices such as organic solar cells. Here, the potential of cross-linking to provide an insoluble, stable, and versatile charge transport layer based on soluble organic semiconductors is studied. For this purpose, a photoreactive tris-azide cross-linker is synthesized. The capability of the small molecular cross-linker is illustrated by applying it to a p-doped polymer used as a hole transport layer in organic solar cells. High cross-linking efficiency and excellent charge extraction properties of the cross-linked doped hole transport layer are demonstrated. However, at high doping levels in the interlayer, the solar cell efficiency is found to deteriorate. Based on charge extraction measurements and numerical device simulations, it is shown that this is due to diffusion of dopants into the active layer of the solar cell. Thus, in the development of future cross-linker materials, care must be taken to ensure that they immobilize not only the host but also the dopants.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Molecular Junctions and Nanostructures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Physics, Faculty of Science and Engineering, Åbo Akademi University, Henriksgatan 2, 20500 Turku, Finland
School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado 80303, United States
Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80303, United States
Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80303, United States
Funding
Otto A. Malm Lahjoitusrahasto · Air Force Office of Scientific Research · H2020 Marie Sk??odowska-Curie Actions · Office of Naval Research · Academy of Finland · Jane ja Aatos Erkon S????ti?? · Suomalainen Tiedeakatemia · Swedish Academy of Engineering Sciences in Finland
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