Roll to roll compatible fabrication of inverted organic solar cells with a self-organized charge selective cathode interfacial layer

Journal article
(Original article)


Publication Details

Author(s): Zhang H, Tan WY, Fladischer S, Ke L, Ameri T, Li N, Turbiez M, Spiecker E, Zhu XH, Cao Y, Brabec C
Journal: Journal of Materials Chemistry A
Publication year: 2016
Volume: 4
Journal issue: 14
Pages range: 5032-5038
ISSN: 2050-7488
eISSN: 2050-7496
Language: English


Abstract


We successfully demonstrate a simple approach to printing efficient, inverted organic solar cells (OSCs) with a self-organized charge selective cathode interface layer based on the small-molecule Phen-NaDPO. Different from previous studies, Phen-NaDPO molecules were blended into a polymer/fullerene blend, comprising a low bandgap diketopyrrolopyrrole-quinquethiophene alternating copolymer pDPP5T-2 and phenyl-C-butyric acid methyl ester (PCBM), and processed by doctor blading in air. We observed a spontaneous, surface energy driven migration of Phen-NaDPO towards the ZnO interface and a subsequent formation of electron selective and barrier free extraction contacts. In the presence of 0.5 wt% Phen-NaDPO, a PCE of 5.4% was achieved for the inverted device based on an ITO/ZnO cathode. Notably, the photovoltaic performances remained at the same level with increasing the Phen-NaDPO concentration in the active layer from 0.25 to 1 wt%. Furthermore, this approach could be proven to effectively work with other cathodes such as bare ITO and ITO/AZO. The self-organization of Phen-NaDPO through spontaneous vertical phase separation is mainly attributed to its high surface energy and strong interaction with the cathode material. The present results highlight that a self-organized cathode interfacial material processed from a "ternary" active layer is fully compatible with the requirements for roll-to-roll fabrication of inverted organic solar cells.



FAU Authors / FAU Editors

Ameri, Tayebeh Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Brabec, Christoph Prof. Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Rechberger, Stefanie Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Ke, Lili
Institute Materials for Electronics and Energy Technology (i-MEET)
Li, Ning Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Zhang, Hong
Institute Materials for Electronics and Energy Technology (i-MEET)


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)


External institutions with authors

BASF Schweiz AG
South China University of Technology (SCUT) / 华南理工大学


Research Fields

B Nanoelectronic Materials
Exzellenz-Cluster Engineering of Advanced Materials
A2 Nanoanalysis and Microscopy
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Zhang, H., Tan, W.-Y., Fladischer, S., Ke, L., Ameri, T., Li, N.,... Brabec, C. (2016). Roll to roll compatible fabrication of inverted organic solar cells with a self-organized charge selective cathode interfacial layer. Journal of Materials Chemistry A, 4(14), 5032-5038. https://dx.doi.org/10.1039/c6ta00391e

MLA:
Zhang, Hong, et al. "Roll to roll compatible fabrication of inverted organic solar cells with a self-organized charge selective cathode interfacial layer." Journal of Materials Chemistry A 4.14 (2016): 5032-5038.

BibTeX: 

Last updated on 2019-21-06 at 09:03