In:
Nanoscale Advances, Royal Society of Chemistry (RSC), Vol. 5, No. 8 ( 2023), p. 2190-2198
Abstract:
The grain sizes of soft CH 3 NH 3 PbI 3 (MAPbI 3 ) thin films and the atomic contact strength at the MAPbI 3 /P3CT-Na interface are manipulated by varying the drying time of the saturated MAPbI 3 precursor solutions, which influences the device performance and lifespan of the resultant inverted perovskite photovoltaic cells. The atomic-force microscopy images, cross-sectional scanning electron microscopy images, photoluminescence spectra and absorbance spectra show that the increased short-circuit current density ( J SC ) and increased fill factor (FF) are mainly due to the formation of merged MAPbI 3 grains. Besides, the open-circuit voltage ( V OC ) of the encapsulated photovoltaic cells largely increases from 1.01 V to 1.15 V, thereby increasing the power conversion efficiency from 17.89% to 19.55% after 30 days, which can be explained as due to the increased carrier density of the MAPbI 3 crystalline thin film. It is noted that the use of the optimized drying time during the spin coating process results in the formation of merged MAPbI 3 grains while keeping the contact quality at the MAPbI 3 /P3CT-Na interface, which boosts the device performance and lifespan of the resultant perovskite photovoltaic cells.
Type of Medium:
Online Resource
ISSN:
2516-0230
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2942874-9
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