Interfacial Modification of the Electron Collecting Layer of Low-Temperature Solution-Processed Organometallic Halide Photovoltaic Cells Using an Amorphous Perylenediimide
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Authors
Shahiduzzaman, M
Adhikari, Tham
Yamamoto, K
Lebel, Olivier
Nunzi, Jean-Michel
Date
2016-10-23
Type
journal article
Language
en
Keyword
solar cell , perovskite , molecular glass
Alternative Title
Abstract
The efficiency of organometallic halide photovoltaic cells can be improved by interfacial modification of the titanium oxide (TiOx) electron collecting layer by a thin layer of an organic material. Enhancements of power conversion efficiency up to 37% were obtained with PC61BM, but the performance is highly dependent on processing conditions and PCBM is still an expensive material. Herein, a glass-forming perylenetetracarboxylicdiimide derivative (PDI-glass) was used as interface material. The devices were optimized with varying PDIglass thickness. With an optimal 10 nm-thickness, a power conversion efficiency increase of 39% were obtained, with an increase in short-circuit current from 9.7 to 11.05 mA cm−2 and fill factor from 0.51 to 0.61. Aside from the thickness of the PDI-glass layer, the process yields consistent results independent of the processing conditions. Photoluminescence spectra revealed the presence of charge transfer at the PDI-glass – active layer interface. The films were further studied by X-ray diffraction (XRD), atomic force microscopy (AFM), and scanning electron microscopy (SEM).
Description
The final publication is available at Elsevier via https://doi.org/10.1016/j.solmat.2016.10.041 © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Citation
Solar Energy Materials and Solar Cells 160, 294–300 (2017)
Publisher
Elsevier