scholarly journals Imperfections and their passivation in halide perovskite solar cells

2019 ◽  
Vol 48 (14) ◽  
pp. 3842-3867 ◽  
Author(s):  
Bo Chen ◽  
Peter N. Rudd ◽  
Shuang Yang ◽  
Yongbo Yuan ◽  
Jinsong Huang
Keyword(s):  
Solar Cells ◽  
Radiative Recombination ◽  
Perovskite Solar Cells ◽  
High Density ◽  
Polycrystalline Films ◽  
Ion Migration ◽  
Device Stability ◽  
Device Efficiency ◽  
Halide Perovskite ◽  
Improve Device

Perovskite solar cells to date are made of polycrystalline films which contain a high density of defects. Imperfection passivation to reduce non-radiative recombination and suppress ion migration could improve device efficiency and device stability.

Ion Migration in Triple-Cation Mixed-Halide Perovskite Solar Cells with Potassium Passivation

2019 ◽  
Author(s):  
Moritz Futscher ◽  
Lucie McGovern ◽  
Kangyu Ji ◽  
Sandy Sanchez ◽  
Sam Stranks ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Ion Migration ◽  
Halide Perovskite

scholarly journals Dark electrical bias effects on moisture-induced degradation in inverted lead halide perovskite solar cells measured by using advanced chemical probes

2018 ◽  
Vol 2 (4) ◽  
pp. 905-914 ◽  
Author(s):  
Jérémy Barbé ◽  
Vikas Kumar ◽  
Michael J. Newman ◽  
Harrison K. H. Lee ◽  
Sagar M. Jain ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Chemical Probes ◽  
Ion Migration ◽  
Halide Perovskite ◽  
Electrical Bias ◽  
Lead Halide

The dark electrical bias degradation of inverted perovskite solar cells is due to ion migration in the presence of moisture.

Critical Role of Grain Boundaries for Ion Migration in Formamidinium and Methylammonium Lead Halide Perovskite Solar Cells

2016 ◽  
Vol 6 (13) ◽  
pp. 1600330 ◽  
Author(s):  
Jae S. Yun ◽  
Jan Seidel ◽  
Jincheol Kim ◽  
Arman Mahboubi Soufiani ◽  
Shujuan Huang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Grain Boundaries ◽  
Critical Role ◽  
Perovskite Solar Cells ◽  
Ion Migration ◽  
Halide Perovskite ◽  
Lead Halide

scholarly journals Improving the Aesthetics and Performance of Perovskite Materials for Photovoltaics

2021 ◽  
Author(s):  
◽  
Tamara D. McFarlane
Keyword(s):  
Solar Cells ◽  
Organic Dyes ◽  
Perovskite Solar Cells ◽  
Colour Change ◽  
Ambient Conditions ◽  
Perovskite Materials ◽  
Device Efficiency ◽  
Lower Light ◽  
Halide Perovskite ◽  
Lead Halide

Within the last decade, lead halide perovskite solar cells have rapidly evolved to the cusp of commercialisation. Current record device efficiencies have surpassed 25% however; a principal limitation of these materials is their instability on exposure to ambient conditions. Methylammonium lead tri-bromide (MAPbBr3) perovskite has shown superior stability over other lead halide perovskite materials, yet the efficiencies of MAPbBr3 devices are significantly lower with a record efficiency of 10.4%. This research investigates the treatment of MAPbBr3 perovskite solar cells with organic dyes of complementary absorbance in a bid to maximise the light harvesting, increase the photocurrent and improve the device efficiency. Initial investigations focused on developing an optimised build method capable of manufacturing MAPbBr3 devices which consistently achieve above 1% efficiency. The optical characterisation of six organic dyes revealed a red indoline dye, D205 and a blue squaraine, SQ2 (which both absorb strongly between 300-700 nm) would offer the best complementary absorbance to MAPbBr3 perovskite. On adding the dyes, the perovskite layer underwent an evident colour change highlighting the potential for coloured perovskite cells which could be beneficial for building-integrated applications. MAPbBr3 cells co-sensitised using a novel method (which sensitises the film after perovskite crystallisation) show improved efficiency (2.6% SQ2, 3.1% D205) over perovskite-only devices (2%) with a 10% photocurrent contribution from the dye. Whilst increases in the photocurrent are observed with co-sensitisation, increased device efficiencies are mainly derived from improvements in the fill factor. We also see lower series resistance and increased photoluminescence lifetime with co-sensitisation where control and co-sensitised MAPbBr3 thin-films produce average lifetimes of 0.44 ns and 0.80 ns, respectively. Further investigation has revealed the dye solvent, toluene, and the dye both help to improve device performance acting as both a treatment and a second sensitiser in the device by passivating defects and lowering recombination losses whilst providing additional photocurrent through increased absorbance. As a result, co-sensitised devices show slower recombination kinetics resulting in increased open-circuit voltage under lower light levels. These effects have proven beneficial for thicker co-sensitised devices (>0.7 µm) where they have often translated into large increases in device efficiency. In future, this may be beneficial for indoor or lower light level PV systems including within the rapidly expanding internet of things market.

scholarly journals Revealing the origin of voltage loss in mixed-halide perovskite solar cells

2020 ◽  
Vol 13 (1) ◽  
pp. 258-267 ◽  
Author(s):  
Suhas Mahesh ◽  
James M. Ball ◽  
Robert D. J. Oliver ◽  
David P. McMeekin ◽  
Pabitra K. Nayak ◽  
...  
Keyword(s):  
Solar Cells ◽  
Radiative Recombination ◽  
Perovskite Solar Cells ◽  
Wide Bandgap ◽  
Voltage Loss ◽  
Halide Perovskite

The loss from halide-segregation in wide bandgap perovskite solar cells is quantified, revealing that the performance bottleneck currently is, in fact, non-radiative recombination.

scholarly journals Ion migration drives self-passivation in perovskite solar cells and is enhanced by light soaking

RSC Advances ◽  
2021 ◽  
Vol 11 (20) ◽  
pp. 12095-12101
Author(s):  
Bart Roose
Keyword(s):  
Solar Cells ◽  
Crack Formation ◽  
Strain Relaxation ◽  
Perovskite Solar Cells ◽  
Ion Migration ◽  
Halide Perovskite ◽  
Lead Halide

Ion migration can assist self-passivation and strain relaxation in lead halide perovskite films, while restriction of ion migration can lead to crack formation. Light soaking increases ion migration, allowing self-passivation and strain relaxation.

A thiourea additive-based quadruple cation lead halide perovskite with an ultra-large grain size for efficient perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21824-21833 ◽  
Author(s):  
Jyoti V. Patil ◽  
Sawanta S. Mali ◽  
Chang Kook Hong
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Controlling the grain size of the organic–inorganic perovskite thin films using thiourea additives now crossing 2 μm size with >20% power conversion efficiency.

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