Utilizing Sulfonated Reduced Graphene Oxide as a Dopant to Enhance Perovskite Grain Sizes

Nur Ezyanie Safie; Mohd Asyadi Azam; Nur Sabrina Sahira Syed Omar; Nur Amanina Abdul Razak

doi:10.4028/p-1ka447

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Utilizing Sulfonated Reduced Graphene Oxide as a Dopant to Enhance Perovskite Grain Sizes
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HomeMaterials Science ForumMaterials Science Forum Vol. 1055Utilizing Sulfonated Reduced Graphene Oxide as a...

Utilizing Sulfonated Reduced Graphene Oxide as a Dopant to Enhance Perovskite Grain Sizes

Abstract:

Out of the perovskite material used in Perovskite Solar Cells, methylammonium lead triiodide (MAPbI₃) is the most studied, proving to yield a device with high power conversion efficiency. However, this perovskite material has a high tendency to degrade, especially when exposed to high humidity and ambient atmosphere. The degradation issue has led to its poor morphology, which eventually affects the device's power conversion efficiency based on this perovskite material. Therefore, this study aims to enhance the morphological property of the perovskite thin film by incorporating sulfonated reduced graphene oxide (srGO) as a dopant. The reduced graphene oxide is synthesized through modified Hummer's method and further sulfonated before being incorporated into the perovskite thin film deposited under relative humidity above 80% in ambient conditions. The srGO has successfully assisted the nucleation growth of MAPbI₃ with the increment of grain size is approaching micron-sized. In this work, the optimized weight percentage of srGO in methylammonium iodide (MAI) precursor is found to be 20% resulting in grain size in the diameter range of 300 to 1000 nm. Hence, this perovskite doped srGO would be incorporated as the active layer for further application, especially in inverted planar perovskite solar cells.

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Periodical:

Materials Science Forum (Volume 1055)

Pages:

47-51

DOI:

https://doi.org/10.4028/p-1ka447

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Online since:

March 2022

Authors:

Nur Ezyanie Safie, Mohd Asyadi Azam*, Nur Sabrina Sahira Syed Omar, Nur Amanina Abdul Razak

Keywords:

Functionalized Graphene, Perovskite Grain Sizes, Sulfonation

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