Abstract
Herein, we studied the effect of MgO coating thickness on the performance of printable perovskite solar cells (PSCs) by varying the electrodeposition time of Mg(OH)2 on the fluorine-doped tin oxide (FTO)/TiO2 electrode. Electrodeposited Mg(OH)2 in the electrode was confirmed by energy dispersive X-ray (EDX) analysis and scanning electron microscopic (SEM) images. The performance of printable PSC structures on different deposition times of Mg(OH)2 was evaluated on the basis of their photocurrent density-voltage characteristics. The overall results confirmed that the insulating MgO coating has an adverse effect on the photovoltaic performance of the solid state printable PSCs. However, a marginal improvement in the device efficiency was obtained for the device made with the 30 s electrodeposited TiO2 electrode. We believe that this undesirable effect on the photovoltaic performance of the printable PSCs is due to the higher coverage of TiO2 by the insulating MgO layer attained by the electrodeposition technique.
Highlights
IntroductionPerovskite solar cell (PSC) technology has made tremendous progress over the last few years, with a significant increase in power conversion efficiency with recent devices reaching over 22% [1]
Perovskite solar cell (PSC) technology has made tremendous progress over the last few years, with a significant increase in power conversion efficiency with recent devices reaching over 22% [1].Initially, perovskite (CH3 NH3 PbI3 ) was used as a sensitizer to replace organic dye molecules in dye-sensitized solar cells by Miyasaka et al [2]
(device D) in printable PSCs does not show much benefit in improving the photo-conversion efficiency (PCE) compared to the bare in printable PSCs does not show much benefit in improving the PCE compared to the bare devices, which could be due to the higher coverage of TiO2 by the insulating MgO layer attained by devices, which could be due to the higher coverage of TiO2 by the insulating MgO layer attained by the electrodeposition of Mg(OH)2
Summary
Perovskite solar cell (PSC) technology has made tremendous progress over the last few years, with a significant increase in power conversion efficiency with recent devices reaching over 22% [1]. Electrolyte hindered the interest of this new sensitizer until realizing the possibility of replacing the electrolyte with a solid organic hole transport material (HTM), spiro MeOTAD [3] Since both mesoscopic and planar heterojunction PSCs have been fabricated with different architectures and preparation methods [4,5,6,7]. Over the last years, many attempts have been made to enhance the overall cell performance of PSCs by retarding the back transfer of photo-generated electrons through the FTO/TiO2 interface by surface modification of TiO2 using insulating metal oxides [10,11,12] and hydroxides [13,14]. Our results confirmed that there is an adverse effect on the device performance with the MgO coating obtained by electrodeposition of Mg(OH) on the printable PSCs
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