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Pushing the Envelope: Achieving an Open-Circuit Voltage of 1.18 V for Unalloyed MAPbI(3) Perovskite Solar Cells of a Planar Architecture
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2018 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 28, no 30, article id 1801237Article in journal (Refereed) Published
Abstract [en]

After an overwhelmingly fast increase during the period from 2009 to 2016, the power conversion efficiency of hybrid perovskite solar cells levels at approximate to 22% during the past two years. Every small advance to theoretical limits of the photovoltaic metrics will significantly deepen the understanding of internal processes inside the perovskite solar cells. Here, by introducing chloroform as the antisolvent, the one-step deposition method to fabricate methylammonium lead tri-iodide (MAPbI(3)) perovskite films under ambient air condition is optimized. With MAPbI(3) solar cells of a planar architecture, a record high V-oc of 1.18 V is obtained under simulated AM1.5 sunlight. The achievement helps pure MAPbI(3) to reestablish its potential as a model compound for research in hybrid perovskite solar cells. After systematic comparison on different electron transport layers (SnO2 and TiO2) and fluorine doped tin oxide (FTO) substrates of different roughness for photon trapping inside MAPbI(3) solar cells, the remaining 0.14 V V-oc loss is elucidated to be due to the poor luminescent property of the MAPbI(3) films.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2018. Vol. 28, no 30, article id 1801237
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Materials Chemistry
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URN: urn:nbn:se:kth:diva-232884DOI: 10.1002/adfm.201801237ISI: 000439738200013Scopus ID: 2-s2.0-85050406645OAI: oai:DiVA.org:kth-232884DiVA, id: diva2:1237672
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QC 20180809

Available from: 2018-08-09 Created: 2018-08-09 Last updated: 2018-08-09Bibliographically approved

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Sun, Licheng

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