The effect of storage cycle on improvement in the photovoltaic parameters of planar triple cation perovskite solar cells

Ferrara, V. La; Maria, A. De; Rametta, Gabriella; Veneri, P. Delli

doi:10.1039/d1ma00345c

Cited by 8 publications

(14 citation statements)

References 71 publications

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“…The perovskite solar cells were built on glass substrates coated with patterned ITO, in accordance with the procedure described in a previous work [33]. The n-i-p architecture was considered with the glass/ITO/ETL/perovskite-absorber/HTL/Au layer sequence, using SnO 2 or graphene-doped SnO 2 as the ETL (for the reference and modified devices, respectively), Pb-based triple-cation (Cs, FA = formamidinium, MA = methylammonium) mixed-halide (I, Br) perovskite as the absorber, and Spiro-OMeTAD as the HTL.…”

Section: Device Fabricationmentioning

confidence: 99%

“…The solar cells were finally completed by evaporating the gold electrodes (80 nm). More details about fabrication of all the layers can be found in [33].…”

Section: Device Fabricationmentioning

confidence: 99%

“…From a structural point of view graphene nano-platelets provides segregated trap states in SnO 2 , which accumulate large, isolated concentrations of free electrons, thereby acting as localized reservoirs that avoid the recombination and facilitate the efficient transport of electrons. In regard to ageing, the hydrophobicity of graphene is the main factor enabling it to retard the degradation of the perovskite and to improve the device's stability [17,18] without the need for any low-humid-air and vacuum storage, which, indeed, is required in the case of undoped ETL [33].…”

Section: Introductionmentioning

confidence: 99%

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Impedance Spectroscopy Analysis of Perovskite Solar Cell Stability

et al. 2023

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The aim of this work is to investigate the degradation of perovskite solar cells (PSCs) by means of impedance spectroscopy, a highly sensitive characterization technique used to establish the electrical response of a device in a nondestructive manner. In this paper, PSCs with two different electron transport layers (ETLs) are studied: PSCs with undoped SnO2 as an ETL are compared to PSCs with an ETL composed of graphene-doped SnO2 (G-SnO2). Experimental data were collected immediately after fabrication and after one week, monitoring both impedance spectroscopy and dark current-voltage (I-V) curves. It was observed that, in the case of the undoped PSCs, the degradation of the solar cells affected both the AC behavior of the devices, modifying the associated Nyquist plots, and the DC behavior, observable from the dark I-V measurements. Conversely, the solar cells with G-SnO2 showed no variation. Considering the Nyquist plots, a quantitative analysis was performed by comparing the parameters of a proper equivalent circuit model. The results were coherent with those achieved in the DC analysis, thus proving that the analysis of impedance spectra, supported with dark I-V curves, allows one to gain a deeper knowledge of the degradation phenomena of perovskite solar cells. This study opens the door for further improvement of these devices through a better understanding of their electrical behavior.

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Section: Device Fabricationmentioning

confidence: 99%

“…The solar cells were finally completed by evaporating the gold electrodes (80 nm). More details about fabrication of all the layers can be found in [33].…”

Section: Device Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impedance Spectroscopy Analysis of Perovskite Solar Cell Stability

et al. 2023

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“…AZO layers were deposited by RF sputtering at 13.56 MHz with Ar plasma and no intentional substrate heating in a MRC system starting from a doped ZnO target (2 wt% Al 2 O 3 ). More details about perovskite solar cells fabrication can be found in reference [25].…”

Section: Perovskite Solar Cells Fabricationmentioning

confidence: 99%

Monolithic Perovskite/Silicon-Heterojunction Tandem Solar Cells with Nanocrystalline Si/SiOx Tunnel Junction

et al. 2021

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Perovskite/silicon tandem solar cells have strong potential for high efficiency and low cost photovoltaics. In monolithic (two-terminal) configurations, one key element is the interconnection region of the two subcells, which should be designed for optimal light management and prevention of parasitic p/n junctions. We investigated monolithic perovskite/silicon-heterojunction (SHJ) tandem solar cells with a p/n nanocrystalline silicon/silicon-oxide recombination junction for improved infrared light management. This design can additionally provide for resilience to shunts and simplified cell processing. We probed modified SHJ solar cells, made from double-side polished n-type Si wafers, which included the proposed front-side p/n tunnel junction with the p-type film simultaneously functioning as selective charge transport layer for the SHJ bottom cell, trying different thicknesses for the n-type layer. Full tandem devices were then tested, by applying a planar n-i-p mixed-cation mixed-halide perovskite top cell, fabricated via low temperature solution methods to be compatible with the processed Si wafer. We demonstrate the feasibility of this tandem cell configuration over a 1 cm2 area with negligible J-V hysteresis and a VOC ~1.8 V, matching the sum of the VOC-s contributed by the two components.

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“…Organic‐inorganic perovskite solar cells (PVSCs) have gained attention due the distinguished characteristics such as high absorption coefficients of 1.5 × 10 4–5 cm −1 at 550–780 nm, 1 excellent transport properties, suitable direct band gap ( E g = 1.48–2.3 eV) and large electron‐hole (e‐h) diffusion length (up to 1 mm). Recently, the power conversion efficiency (PCE) of PVSCs has exceeded 25%, as an all‐time high value 2‐5 . There are increasing studies focused on the planar structure of solar devices due to their straightforward processing, despite the fact that other structures, such as mesoporous TiO 2 , demonstrate higher efficiency.…”

Section: Introductionmentioning

confidence: 99%

Performance of planar perovskite solar cells based on formamidinium cations: Simulation and fabrication

Teimouri

Mehrvarz

Ebrahimi

et al. 2022

Intl J of Energy Research

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Summary The best efficiency ever recorded for state‐of‐the‐art perovskite solar cells (PSCs) is about 25% where the formamidinium (FA)‐dominated perovskites were adopted. But the optimum content of FA perovskite solar cells based on Cs0.05(FAxMA[1−x])0.95Pb(I0.83Br0.17)3 films has yet to materialize the high‐power conversion efficiency. Herein, high quality and uniform perovskite films constituting Cs‐MA‐FA (Cesium; Methylammonium) mixed cation in the A‐site of the ABX3 structure with different FA content are synthesized by a typical spin coating based antisolvent technique. Because of the limitations of perovskite and solar cell materials, the influences of various FAs on the device performance are analyzed through device simulation. From the synthesized films, the band gap equation of Cs0.05(FAxMA[1−x])0.95Pb(I0.83Br0.17)3 has been estimated, ranging from 2.175 eV to 1.5 eV for various FA/(FA + MA) ratios respectively. Ultimately, the highest conversion efficiency of the planar solar cell based on graded perovskite with various FA content was obtained for the case where the positive Eg grading consists of the Eg of 2.175 eV at the front (FA/[FA + MA] of 0) and the Eg of 1.5 eV at the back (FA/[FA + MA] of 1). The Cs0.05(FA0.87MA0.13)0.95Pb(I0.83Br0.17)3 cell achieved an AM1.5G conversion efficiency of around 20.98%, showing improved VOC, JSC, and FF among the planar perovskite solar cells with different x.

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The effect of storage cycle on improvement in the photovoltaic parameters of planar triple cation perovskite solar cells

Abstract: One of the important challenges in the field of perovskite solar cells is to investigate the competitive mechanisms of humidity and oxygen which improve efficiency of cells at moderate humidity...

Cited by 8 publications

References 71 publications

Impedance Spectroscopy Analysis of Perovskite Solar Cell Stability

Impedance Spectroscopy Analysis of Perovskite Solar Cell Stability

Monolithic Perovskite/Silicon-Heterojunction Tandem Solar Cells with Nanocrystalline Si/SiOx Tunnel Junction

Performance of planar perovskite solar cells based on formamidinium cations: Simulation and fabrication

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