Effects of Cu, K and Guanidinium Addition to CH3NH3PbI3 Perovskite Solar Cells

Enomoto, Ayu; Suzuki, Atsushi; Oku, Takeo; Okita, Masanobu; Fukunishi, Sakiko; Tachikawa, Tomoharu; Hasegawa, Tomoya

doi:10.1007/s11664-022-09688-3

Cited by 24 publications

(9 citation statements)

References 62 publications

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“…Therefore, Cu ions easily enter the perovskite layer, and the negatively charged defects are effectively passivated by the interaction between ions, enhancing the performance and stability of the device. 31,32 In light of the photovoltaic performance of PSCs is greatly influenced by the charge carrier transport dynamic. Figure 5a,b presents the transient photovoltage (TPV) and transient photocurrent (TPC) decay curves for the PSCs based on SnO 2 and SnO 2 −CuCl 2 ETL.…”

Section: Resultsmentioning

confidence: 99%

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Small-Molecule Copper Chloride Modulating the Buried Interfaces of Perovskite Solar Cells

Chen,

Wu,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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In perovskite solar cells (PSCs), tin dioxide (SnO 2 ) is a highly effective electron transport material. On the other hand, the low intrinsic conductivity of SnO 2 , the high trap-state density on the surface and bulk of SnO 2 , and inadequate interface contacts between SnO 2 and perovskite significantly impact device performance. Herein, smallmolecule copper(II) chloride (CuCl 2 ) is introduced into the SnO 2 dispersion, which inhibits the agglomeration of SnO 2 colloids and improves the quality of the electron transport layer. Furthermore, the introduction of CuCl 2 optimizes the energy-level array between the ETL and perovskite layer (PVK) and passivates the anion/cation defects in SnO 2 , perovskite, and their interface, realizing the systematic modulation of the photoelectronic properties of the ETLs and PVKs as well as the PVK/ETL. As a result, the CuCl 2 -opmized PSC exhibits an impressive power conversion efficiency of 23.71%, along with improved stability.

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Section: Resultsmentioning

confidence: 99%

“…This may be due to the small radius of Cu ions (∼0.73 Å). Therefore, Cu ions easily enter the perovskite layer, and the negatively charged defects are effectively passivated by the interaction between ions, enhancing the performance and stability of the device. , …”

Section: Resultsmentioning

confidence: 99%

Small-Molecule Copper Chloride Modulating the Buried Interfaces of Perovskite Solar Cells

Chen,

Wu,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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“…The electron density distributions around the lowest unoccupied molecular orbital (LUMO) and the highest occupied molecular orbital (HOMO) were calculated from self-consistent-field theory. [38][39][40] The diffusion coefficients were obtained from Born-Oppenheimer molecular dynamics (BOMD) calculations, and Carr-Parrinello molecular dynamics (CPMD) calculations were performed at 300 K for equilibration of electronic states, nuclear positions, and constant temperature MD calculations, in that order. [41]…”

Section: Methodsmentioning

confidence: 99%

Metallophtalocyanine Used Interface Engineering for Improving Long‐Term Stability of Methylammonium Lead Triiodide Perovskite

Ogawa

Suzuki

Oku

et al. 2023

Physica Status Solidi (a)

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CH3NH3PbI3 perovskite solar cells using metal phthalocyanines (MPcs) with decaphenylcyclopentasilane (DPPS) are fabricated and characterized. The effect of addition of MPcs on the photovoltaic properties is investigated by changing the central element of the MPc and depositing MPc and DPPS successively on the perovskite layer. When silicon phthalocyanine is used to the cell, the microstructure of the perovskite film improves, which results in improvement of the open‐circuit voltage, fill factor, and photoconversion efficiency. For cells with only MPcs as the hole‐transport layer, the conversion efficiency increases by passivation with the phthalocyanine and crystal growth at room temperature.

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“…Using Cu doped or substituted showed improved absorption properties and enhanced electrical conductivity. [17][18][19][20] However, some results showed unsatisfactory device performance with the one-step synthesis method, [14,[21][22][23] which is explained by dopant impurities creating the charge recombination center. [24] The photovoltaic parameters are listed in Table S1 (Supporting Information).…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Efficiency and Stability for Tin Halide Perovskite Solar Cells by Using Improved Doping Method

Zhang

Wang

et al. 2023

Advanced Optical Materials

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In recent years, tin halide perovskite solar cells (PKSCs) have emerged as a promising alternative to lead‐PKSCs. However, due to defects such as Sn4+ and iodide vacancies, their efficiency is lower than lead‐PKSCs. To address this issue, various strategies are proposed to improve the quality of perovskite, including copper iodide (CuI) doping. Unfortunately, the conventional solvent composition of DMF:DMSO = 4:1 has limited the solubility of CuI, resulting in inconsistent results and limited efficiency improvements. However, this research proposed a preprocessing method of CuI to decrease the defects and improve the perovskite layer's morphology. As a result, the efficiency of tin‐PKSCs with both P‐I‐N and hole transport layer (HTL) free structures is enhanced, increasing from 9.8% to 13.1% and 9.4% to 10.5%, respectively. Moreover, the doped tin‐PKSCs have exhibited better stability, retaining 75% of their initial power conversion efficiency (PCE) after being stored in a glovebox for 102 days.

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Effects of Cu, K and Guanidinium Addition to CH3NH3PbI3 Perovskite Solar Cells

Cited by 24 publications

References 62 publications

Small-Molecule Copper Chloride Modulating the Buried Interfaces of Perovskite Solar Cells

Small-Molecule Copper Chloride Modulating the Buried Interfaces of Perovskite Solar Cells

Metallophtalocyanine Used Interface Engineering for Improving Long‐Term Stability of Methylammonium Lead Triiodide Perovskite

Enhancement of Efficiency and Stability for Tin Halide Perovskite Solar Cells by Using Improved Doping Method

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