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Optoelectrical Properties of Hexamine Doped-Methylammonium Lead Iodide Perovskite under Different Grain-Shape Crystallinity

Authors :
Marjoni Imamora Ali Umar
Annisa Zahra Ahdaliza
Salah M. El-Bahy
Nur Aliza
Siti Naqiyah Sadikin
Jaenudin Ridwan
Abang Annuar Ehsan
Mohammed A. Amin
Zeinhom M. El-Bahy
Akrajas Ali Umar
Source :
Nanomaterials, Vol 13, Iss 7, p 1281 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

The crystallinity properties of perovskite influence their optoelectrical performance in solar cell applications. We optimized the grain shape and crystallinity of perovskite film by annealing treatment from 130 to 170 °C under high humidity (relative humidity of 70%). We found that the grain size, grain interface, and grain morphology of the perovskite are optimized when the sample was annealed at 150 °C for 1 h in the air. At this condition, the perovskite film is composed of 250 nm crystalline shape grain and compact inter-grain structure with an invincible grain interface. Perovskite solar cells device analysis indicated that the device fabricated using the samples annealed at 150 °C produced the highest power conversion efficiency, namely 17.77%. The open circuit voltage (Voc), short-circuit current density (Jsc), and fill factor (FF) of the device are as high as 1.05 V, 22.27 mA/cm2, and 0.76, respectively. Optoelectrical dynamic analysis using transient photoluminescence and electrochemical impedance spectroscopies reveals that (i) carrier lifetime in the champion device can be up to 25 ns, which is almost double the carrier lifetime of the sample annealed at 130 °C. (ii) The interfacial charge transfer resistance is low in the champion device, i.e., ~20 Ω, which has a crystalline grain morphology, enabling active photocurrent extraction. Perovskite’s behavior under annealing treatment in high humidity conditions can be a guide for the industrialization of perovskite solar cells.

Details

Language :
English
ISSN :
20794991
Volume :
13
Issue :
7
Database :
Directory of Open Access Journals
Journal :
Nanomaterials
Publication Type :
Academic Journal
Accession number :
edsdoj.833078e822f4c6cbc0fb4b44bed4b07
Document Type :
article
Full Text :
https://doi.org/10.3390/nano13071281