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Title: Interlayers engineering for flexible large-area planar perovskite solar cells
Authors: Li, Jia
Han, Guifang
Vergeer, Kurt
Dewi, Herlina Arianita
Wang, Hao
Mhaisalkar, Subodh
Bruno, Annalisa
Mathews, Nripan
Keywords: Engineering::Materials
Issue Date: 2019
Source: Li, J., Han, G., Vergeer, K., Dewi, H. A., Wang, H., Mhaisalkar, S., . . . Mathews, N. (2020). Interlayers engineering for flexible large-area planar perovskite solar cells. ACS Applied Energy Materials, 3(1), 777-784. doi:10.1021/acsaem.9b01924
Journal: ACS Applied Energy Materials
Abstract: Hybrid metal halide perovskite solar cells (PSCs) have consistently demonstrated high power conversion efficiency (PCE), although the best performing PSCs mostly employ high-temperature (500 oC) processed compact and mesoporous TiO2. Instead, low-temperature processed PSCs are desirable for implementation on flexible substrates and tandem solar cells. Here, we present a new method to achieve high efficiency flexible planar PSCs based on a low-temperature processed nonaqueous sol-gel route synthesized TiO2 and a guanidinium iodide (GuaI) salt passivation treatment of the perovskite film. We fabricate both rigid and flexible triple-cation perovskite (Cs0.05 (MA0.17FA0.83)0.95Pb(I0.85Br0.15)3, Eg ~1.58 eV) PSCs, achieving PCEs of 19.8% and 17.0% on glass and polyethylene naphtholate, (PEN) substrates respectively. At the same time, rigid and flexible high-bandgap double cation (FA0.85Cs0.15Pb(I0.7Br0.3)3, Eg ~1.72 eV) PSCs reached a PCE of 18.0 % and of 15.8%. Moreover, large area (1cm2) ~1.58 eV and ~1.72 eV-PSCs achieved PCEs of 18.2% and 16.7% PCE on glass substrates and of 16.2% and 13.9% on PEN substrates demonstrating the high uniformity of all the solar cell layers.
ISSN: 2574-0962
DOI: 10.1021/acsaem.9b01924
DOI (Related Dataset): 10.21979/N9/OJHQEK
Schools: School of Materials Science and Engineering 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Energy Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles

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