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Preferential (100)-oriented CH3NH3PbI3 perovskite film formation by flash drying and elucidation of formation mechanism

Title
Preferential (100)-oriented CH3NH3PbI3 perovskite film formation by flash drying and elucidation of formation mechanism
Authors
Kim, Se-YunJo, Hyo-JeongSung, Shi-JoonKim, Kang-PilHeo, Young-WooKim, Dae-Hwan
DGIST Authors
Sung, Shi-Joon; Kim, Kang-PilKim, Dae-Hwan
Issue Date
2016
Citation
RSC Advances, 6(97), 94502-94509
Type
Article
Article Type
Article
Keywords
Crystal OrientationFilm GrowthFormation MechanismGrowth MechanismsGrowth OrientationsLight-Emitting DiodesOptoelectronic DevicesPerovskitePerovskite FilmsPerovskite GrainsPerovskite Solar CellsPhotoelectrochemical CellsPhotovoltaic CellsPhotovoltaic EffectsResidual SolventsSelective GrowthSolar CellsSolution System
ISSN
2046-2069
Abstract
Most previous studies of perovskite films have explored the use of highly (110)-oriented perovskite films, even though films having the (100) orientation exhibit more desirable characteristics. In this study, we examined a simple method for growing (100)-oriented perovskite films for solar cells and elucidated their growth mechanism. Oriented perovskite grains with a lateral size of as much as 20 μm and a very flat surface morphology could be obtained. It was found that the amount of thermal energy delivered during annealing and the amount of residual solvent remaining after spin coating play critical roles in determining the growth orientation of the perovskite film. It was suggested that the formation mechanism of the preferentially (100)-oriented grains is most likely the classical hetero-nucleation and selective growth process in the solution system, even though DMSO was included in the solvent. The results of this study will aid in the optimization of preferentially (100)-oriented CH3NH3PbI3 perovskite film, which will be useful for the study of the effect of crystal orientation and the properties of perovskite optoelectronic devices, such as LEDs, sensors, transistors, and photovoltaic cells. © The Royal Society of Chemistry 2016.
URI
http://hdl.handle.net/20.500.11750/5145
DOI
10.1039/c6ra21423a
Publisher
Royal Society of Chemistry
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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