Organometallic Halide Perovskite Synthesis in Polymer Melt for Improved Stability in High Humidity
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Organometallic Halide Perovskite Synthesis in Polymer Melt for Improved Stability in High Humidity John P. Murphy, Jessica M. Andriolo, Brandon M. Ross, Gary F. Wyss, Nicole E. Zander and Jack L. Skinner MRS Advances / FirstView Article / August 2016, pp 1 - 7 DOI: 10.1557/adv.2016.379, Published online: 20 May 2016
Link to this article: http://journals.cambridge.org/abstract_S2059852116003790 How to cite this article: John P. Murphy, Jessica M. Andriolo, Brandon M. Ross, Gary F. Wyss, Nicole E. Zander and Jack L. Skinner Organometallic Halide Perovskite Synthesis in Polymer Melt for Improved Stability in High Humidity. MRS Advances, Available on CJO 2016 doi:10.1557/adv.2016.379 Request Permissions : Click here
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MRS Advances © 2016 Materials Research Society DOI: 10.1557/adv.2016.379
Organometallic Halide Perovskite Synthesis in Polymer Melt for Improved Stability in High Humidity John P. Murphy1, Jessica M. Andriolo1, Brandon M. Ross1, 2, Gary F. Wyss3, Nicole E. Zander4, and Jack L. Skinner1, 2 1
Montana Tech Nanotechnology Lab, Montana Tech, Butte, MT Department of General Engineering, Montana Tech, Butte, MT 3 Center for Advanced Mineral and Metallurgical Processing, Montana Tech, Butte, MT 4 U.S. Army Research Laboratory, Aberdeen, MD 2
ABSTRACT A new organometallic halide perovskite (OHP) synthesis method, whereby a polymer melt is used to thermodynamically drive the reaction that forms OHP crystallites, is demonstrated. The synthesis method allows for the facile encapsulation of moisture-sensitive OHP without the loss of simplicity during fabrication, which makes OHP materials so attractive for the photovoltaic industry. Degradation of OHP crystallites embedded in a polystyrene matrix was studied using UV-Vis absorbance over a period of several days. The OHP crystallites degrade as a result of the reversible nature of the reaction that forms the crystallites. After the reversion to precursors (PbI2 and CH3NH3I) the CH3NH3I irreversibly degrades [2] allowing the degradation to be tracked via optical interrogation. Additionally, surface morphology and elemental analysis of fabricated samples was carried out using SEM/EDS techniques. INTRODUCTION Organometallic halide perovskites (OHPs) have gained notoriety as a material for light harvesting due to the rapid climb in photo-conversion efficiency [1] measured in perovskite solar cells (PSCs). The stability of OHP performance over time and environments is the limiting factor in the wide scale implementation of PSCs, degradation in the presence of moisture being the foremost issue amongst the stability issues [2]. PSC fabrication techniques utilize processes like spin-coating [3], two-stage dipping [4], and vapor deposition [5] to produce OHP films. In the present study, fabrication involved the use of a polymer melt at an elevated temperature (~
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