Enhanced moisture stability of metal halide perovskite solar cells based on sulfur–oleylamine surface modification

Hou, Yu; Zhou, Zi Ren; Wen, Tian; Qiao, Hong; Lin, Ze Qing; Ge, Bing; Yang, Hua

doi:10.1039/c8nh00163d

Cited by 47 publications

(45 citation statements)

References 33 publications

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“…Furthermore, the long‐term stability investigation on PSC devices encapsulated in dark under ambient air conditions with an average temperature of 25 °C and humidity of 55% is displayed in Figure b. After a storage time of 576 h, the PSC device with 2% DIFA maintained over 73% of its original PCE while the control one drops its PCE quickly to about 25% after 408 h. It has been reported that the decomposition of the perovskite films is much easier to start from the surface vacancy sites . Due to the presence of vacancy sites in the perovskite films, water can strongly bind to the defective surface through the hydrogen bonds .…”

Section: Resultsmentioning

confidence: 98%

Additive Engineering to Grow Micron‐Sized Grains for Stable High Efficiency Perovskite Solar Cells

et al. 2019

Advanced Science

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A high‐quality perovskite photoactive layer plays a crucial role in determining the device performance. An additive engineering strategy is introduced by utilizing different concentrations of N,1‐diiodoformamidine (DIFA) in the perovskite precursor solution to essentially achieve high‐quality monolayer‐like perovskite films with enhanced crystallinity, hydrophobic property, smooth surface, and grain size up to nearly 3 µm, leading to significantly reduced grain boundaries, trap densities, and thus diminished hysteresis in the resultant perovskite solar cells (PSCs). The optimized devices with 2% DIFA additive show the best device performance with a significantly enhanced power conversion efficiency (PCE) of 21.22%, as compared to the control devices with the highest PCE of 19.07%. 2% DIFA modified devices show better stability than the control ones. Overall, the introduction of DIFA additive is demonstrated to be a facile approach to obtain high‐efficiency, hysteresis‐less, and simultaneously stable PSCs.

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Section: Resultsmentioning

confidence: 98%

Additive Engineering to Grow Micron‐Sized Grains for Stable High Efficiency Perovskite Solar Cells

et al. 2019

Advanced Science

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“…Surface passivation has primarily been shown to reduce non-radiative recombination by decreasing the defect density of the perovskite film, 29 and in some cases, even improves the environmental stability of the material. 30 Common surface treatments include Lewis bases (such as pyridine and thiophene), and alkylammonium halides, such as methylammonium chloride (MACl) and choline chloride (ChCl). 17,[31][32][33] Modification of charge transport layers has been carried out using various approaches, all with the same overarching goals: reducing interfacial recombination and improving device stability.…”

Section: Introductionmentioning

confidence: 99%

Interfacial charge-transfer doping of metal halide perovskites for high performance photovoltaics

Noel

Habisreutinger

Pellaroque

et al. 2019

Energy Environ. Sci.

118

112

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“…Since Kojima et al first reported organic–inorganic perovskite materials as visible‐light sensitizers in 2009,1 the power conversion efficiencies (PCEs) of hybrid perovskite solar cells (PSCs) have remarkably increased from the initial 3.8% to 25.2%2 in 2019. This demonstrates the potential of PSCs as an alternative to commercial silicon‐based solar cells for applications in the field of photovoltaics 3–7…”

Section: Introductionmentioning

confidence: 82%

Solvent Engineering Using a Volatile Solid for Highly Efficient and Stable Perovskite Solar Cells

Cui

et al. 2020

Advanced Science

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A strategy for efficaciously regulating perovskite crystallinity is proposed by using a volatile solid glycolic acid (HOCH2COOH, GA) in an FA0.85MA0.15PbI3 (FA: HC(NH2)2; MA: CH3NH3) perovskite precursor solution that is different from the common additive approach. Accompanied with the first dimethyl sulfoxide sublimation process, the subsequent sublimation of GA before 150 °C in the FA0.85MA0.15PbI3 perovskite film can artfully regulate the perovskite crystallinity without any residual after annealing. The improved film formation upon GA modification induced by the strong interaction between GA and Pb2+ delivers a champion power conversion efficiency (PCE) as high as 21.32%. In order to investigate the role of volatility in perovskite solar cells (PSCs), nonvolatile thioglycolic acid (HSCH2COOH, TGA) with a similar structure to GA is utilized as an additive reference. Large perovskite grains are obtained by TGA modification but with obvious pinholes, which directly leads to an increased defect density accompanied by a decline in PCE. Encouragingly, the champion PCE achieved for GA‐based PSC device (21.32%) is almost 13% or 20% higher than those of the control device or TGA‐based device. In addition, GA‐modified PSCs exhibit the best stability in light‐, thermal‐, and humidity‐based tests due to the improved film formation.

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Enhanced moisture stability of metal halide perovskite solar cells based on sulfur–oleylamine surface modification

Abstract: In this paper, oleylammonium polysulfides molecules were self-assembled on an etched perovskite film, leading to an enhancement in moisture stability of the devices.

Cited by 47 publications

References 33 publications

Additive Engineering to Grow Micron‐Sized Grains for Stable High Efficiency Perovskite Solar Cells

Additive Engineering to Grow Micron‐Sized Grains for Stable High Efficiency Perovskite Solar Cells

Interfacial charge-transfer doping of metal halide perovskites for high performance photovoltaics

Solvent Engineering Using a Volatile Solid for Highly Efficient and Stable Perovskite Solar Cells

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