Large grained and high charge carrier lifetime CH3NH3PbI3 thin-films: implications for perovskite solar cells

Chouhan, Arun Singh and Jasti, Naga Prathibha and Hadke, Shreyash and Raghavan, Srinivasan and Avasthi, Sushobhan (2017) Large grained and high charge carrier lifetime CH3NH3PbI3 thin-films: implications for perovskite solar cells. In: CURRENT APPLIED PHYSICS, 17 (10). pp. 1335-1340.

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Abstract

Spin coated perovslcite thin films are known to have an issue of pinholes & poor morphology control which lead to poor device-to-device repeatability, that is an impediment to scale-up. In this work, Methylamine vapor annealing process is demonstrated which consistently leads to high-quality perovskite thin-films with an average grain-size of 10-15 mu m. The improvement in film morphology enables improvement in effective carrier recombination lifetime, from 21 its in as-deposited films to 54 mu s in vapor-annealed films. The annealed films with large-grains are also more stable in ambient conditions. Devices made on annealed perovskite films are very consistent, with a standard deviation of only 0.7%. Methylamine vapor annealing process is a promising method of depositing large-grain CH3NH3PbI3 films with high recombination lifetime and the devices with improved performance. (C) 2017 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	CURRENT APPLIED PHYSICS
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	23 Sep 2017 05:11
Last Modified:	23 Sep 2017 05:11
URI:	http://eprints.iisc.ac.in/id/eprint/57853

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