Tailoring the Nature of Interface States in Efficient and Stable Bilayer Organic Solar Cells by a Transfer-Printing Technique

Wang R, Jiang Y, Gruber W, He Y, Wu M, Weitz P, Zhang K, Lüer L, Forberich K, Unruh T, Spiecker E, Deibel C, Li N, Brabec C (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Advanced Materials Interfaces WILEY-VCH Verlag GmbH & Co. KGaA

DOI: 10.1002/admi.202200342

Abstract

Bulk heterojunction organic solar cells (BHJ-OSCs) are designed to overcome inefficient charge generation and limited exciton diffusion of organic semiconductors. However, there are some disadvantages involving inherent voltage losses, microstructure control, and operational instability. Bilayer solar cells (BL-OSCs) without mixed regions are free from these problems and offer a platform to explore the photophysical processes at the donor-acceptor interface. Here, a breakthrough for n-i-p BL-OSCs in charge generation efficiency is reported. A gradual adjustment of the molecular interface orientation of the polymer donor (PM6) is accompanied by the evolution of charge-transfer states and Forster energy transfer. Besides, less recombination losses and superior morphological stability of BL-OSCs are achieved at a PCE comparable to that of BHJ-OSCs with similar layer thickness. This investigation confirms the feasibility of manufacturing BL-OSCs by a transfer printing method and provides a versatile architecture to study fundamental interface phenomena in OSCs independent from microstructure disorder.

Authors with CRIS profile

Rong Wang Institute Materials for Electronics and Energy Technology (i-MEET) Youyu Jiang Institute Materials for Electronics and Energy Technology (i-MEET) Yakun He Institute Materials for Electronics and Energy Technology (i-MEET) Mingjian Wu Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Paul Weitz Institute Materials for Electronics and Energy Technology (i-MEET) Kaicheng Zhang Institute Materials for Electronics and Energy Technology (i-MEET) Larry Lüer Institute Materials for Electronics and Energy Technology (i-MEET) Karen Forberich Institute Materials for Electronics and Energy Technology (i-MEET) Tobias Unruh Professur für Nanomaterialcharakterisierung (Streumethoden) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Ning Li Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Additional Organisation(s)

Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Involved external institutions

Technische Universität Chemnitz DE Germany (DE)

How to cite

APA:

Wang, R., Jiang, Y., Gruber, W., He, Y., Wu, M., Weitz, P.,... Brabec, C. (2022). Tailoring the Nature of Interface States in Efficient and Stable Bilayer Organic Solar Cells by a Transfer-Printing Technique. Advanced Materials Interfaces. https://doi.org/10.1002/admi.202200342

MLA:

Wang, Rong, et al. "Tailoring the Nature of Interface States in Efficient and Stable Bilayer Organic Solar Cells by a Transfer-Printing Technique." Advanced Materials Interfaces (2022).

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