Surface-Passivated CsPbBr3 for Developing Efficient and Stable Perovskite Photovoltaics

All-inorganic perovskites consisting of only inorganic elements have been recently considered as highly stable semiconductors for photoactive layer of optoelectronics applications. However, the formation of high-quality thin film and trap-reduced interface has still remains an important task, which should be solved for improving the performances of all-inorganic perovskite-based photovoltaics. Here, we adopted facile method that could reduce charge-carrier recombination by depositing a passivation agent on the top surface of the CsPbBr3 all-inorganic perovskite layer. We also found that the CsPbBr3 perovskite photovoltaic prepared from surface treatment method using n-octylammonium bromide provides an improved stability in ambient environment and 1-sun illuminating condition. Therefore, the perovskite photovoltaics fabricated from our approach offered an improved power conversion efficiency of 5.44% over that of the control device without surface treatment (4.12%).

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Improved stability of β-CsPbI3 inorganic perovskite using π-conjugated bifunctional surface capped organic cations for high performance photovoltaics

Chemical Communications ◽

10.1039/d0cc05386d ◽

2020 ◽

Vol 56 (89) ◽

pp. 13816-13819

Author(s):

Jie Zhang ◽

Jinchao Liu ◽

Aidong Tan ◽

Jinhua Piao ◽

Zhiyong Fu

Keyword(s):

Solar Cells ◽

High Performance ◽

Organic Cations ◽

Effective Strategy ◽

High Reproducibility ◽

Perovskite Layer ◽

Inorganic Perovskite ◽

Improved Stability

An effective strategy for stable and efficient β-CsPbI3 solar cells is developed via utilizing 2,3-NDAx+ capped inorganic perovskite layer. The corresponding PSC devices display a high reproducibility with a champion stabilized efficiency of 16.69%.

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Improved Stability and Efficiency of Perovskite/Organic Tandem Solar Cells with an All-inorganic Perovskite Layer

Journal of Materials Chemistry A ◽

10.1039/d0ta12286f ◽

2021 ◽

Author(s):

Xin Wu ◽

Yizhe Liu ◽

Feng Qi ◽

Francis Lin ◽

Huiting Fu ◽

...

Keyword(s):

Solar Cells ◽

Perovskite Solar Cells ◽

Perovskite Layer ◽

Tandem Solar Cells ◽

Inorganic Perovskite ◽

Improved Stability

All-inorganic perovskite solar cells (PVSCs) have attracted intensive attentions owing to their tunable bandgaps and excellent photo- and thermostability, making them as promising absorbers in tandem solar cells (TSCs). Herein,...

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Efficient Defect Passivation with Niacin for High-Performance and Stable Perovskite Solar Cells

Journal of Materials Chemistry C ◽

10.1039/d1tc00886b ◽

2021 ◽

Author(s):

Jing Ren ◽

Shurong Wang ◽

Jianxing Xia ◽

Chengbo Li ◽

Lisha Xie ◽

...

Keyword(s):

Solar Cells ◽

Charge Carrier ◽

High Performance ◽

Perovskite Solar Cells ◽

Trap States ◽

Carrier Recombination ◽

Defect Passivation ◽

Recombination Centers ◽

Charge Carrier Recombination ◽

Halide Perovskite

Defects, inevitably produced in the solution-processed halide perovskite films, can act as charge carrier recombination centers to induce severe energy loss in perovskite solar cells (PSCs). Suppressing these trap states...

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Carbon Nanodots as a Potential Transport Layer for Boosting Performance of All-Inorganic Perovskite Nanocrystals-based Photodetector

Crystals ◽

10.3390/cryst11060717 ◽

2021 ◽

Vol 11 (6) ◽

pp. 717

Author(s):

Hassan Algadi ◽

Ahmad Umar ◽

Hasan Albargi ◽

Turki Alsuwian ◽

Sotirios Baskoutas

Keyword(s):

Charge Separation ◽

High Performance ◽

Band Alignment ◽

Transport Layer ◽

Carbon Nanodots ◽

Separation Mechanism ◽

Perovskite Layer ◽

Inorganic Perovskite ◽

Highly Efficient ◽

Efficient Charge

A low-cost and simple drop-casting method was used to fabricate a carbon nanodot (C-dot)/all-inorganic perovskite (CsPbBr3) nanosheet bilayer heterojunction photodetector on a SiO2/Si substrate. The C-dot/perovskite bilayer heterojunction photodetector shows a high performance with a responsivity (R) of 1.09 A/W, almost five times higher than that of a CsPbBr3-based photodetector (0.21 A/W). In addition, the hybrid photodetector exhibits a fast response speed of 1.318/1.342 µs and a highly stable photocurrent of 6.97 µA at 10 V bias voltage. These figures of merits are comparable with, or much better than, most reported perovskite heterojunction photodetectors. UV–Vis absorption and photoluminescent spectra measurements reveal that the C-dot/perovskite bilayer heterojunction has a band gap similar to the pure perovskite layer, confirming that the absorption and emission in the bilayer heterojunction is dominated by the top layer of the perovskite. Moreover, the emission intensity of the C-dot/perovskite bilayer heterojunction is less than that of the pure perovskite layer, indicating that a significant number of charges were extracted by the C-dot layer. The studied band alignment of the C-dots and perovskites in the dark and under emission reveals that the photodetector has a highly efficient charge separation mechanism at the C-dot/perovskite interface, where the recombination rate between photogenerated electrons and holes is significantly reduced. This highly efficient charge separation mechanism is the main reason behind the enhanced performance of the C-dot/perovskite bilayer heterojunction photodetector.

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Time-dependent Langevin-type bimolecular charge carrier recombination in regiorandom poly(3-hexylthiophene)

Synthetic Metals ◽

10.1016/j.synthmet.2005.01.042 ◽

2005 ◽

Vol 155 (2) ◽

pp. 242-245 ◽

Cited By ~ 31

Author(s):

A. Pivrikas ◽

R. Österbacka ◽

G. Juška ◽

K. Arlauskas ◽

H. Stubb

Keyword(s):

Charge Carrier ◽

Time Dependent ◽

Carrier Recombination ◽

Charge Carrier Recombination

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Efficient Computation of Nonadiabatic Coupling Coefficients for Modeling Charge Carrier Recombination in Extended Systems: The Case of Metal–Organic Frameworks

The Journal of Physical Chemistry A ◽

10.1021/acs.jpca.1c05636 ◽

2021 ◽

Author(s):

Maria A. Syzgantseva ◽

Olga A. Syzgantseva

Keyword(s):

Charge Carrier ◽

Metal Organic Frameworks ◽

Efficient Computation ◽

Coupling Coefficients ◽

Nonadiabatic Coupling ◽

Extended Systems ◽

Carrier Recombination ◽

Metal Organic ◽

Charge Carrier Recombination

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Bi-doped Graphitic Carbon Nitride Nanotubes Boosts the Degradation Photocatalysis of Rhodamine B

New Journal of Chemistry ◽

10.1039/d1nj05569k ◽

2022 ◽

Author(s):

Qingqing Gao ◽

Qian Lei ◽

Ruoyan Miao ◽

Manyi Gao ◽

Fang Song ◽

...

Keyword(s):

Charge Carrier ◽

Rhodamine B ◽

High Stability ◽

Carbon Nitride ◽

Graphitic Carbon Nitride ◽

Photocatalytic Efficiency ◽

Metal Free ◽

Carrier Recombination ◽

Charge Carrier Recombination ◽

Polymeric Carbon

Polymeric carbon nitride (PCN) is an emerging metal-free photocatalysts with high stability but is plagued by low photocatalytic efficiency due to the rapid charge carrier recombination behavior. Herein, Bi doped...

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Acid Etching as Surface Treatment Method for Luting of Glass-Ceramic Restorations, part 1: Acids, Application Protocol and Etching Effectiveness

Open Access Macedonian Journal of Medical Sciences ◽

10.3889/oamjms.2018.147 ◽

2018 ◽

Vol 6 (3) ◽

pp. 568-573 ◽

Cited By ~ 4

Author(s):

Emilija Barjaktarova-Valjakova ◽

Anita Grozdanov ◽

Ljuben Guguvcevski ◽

Vesna Korunoska-Stevkovska ◽

Biljana Kapusevska ◽

...

Keyword(s):

Surface Treatment ◽

Glass Ceramic ◽

Hydrofluoric Acid ◽

Treatment Method ◽

Acid Etching ◽

Etching Time ◽

Ceramic Surface ◽

Adhesive Luting ◽

Ceramic Restorations ◽

Etching Effect

AIM: The purpose of this review is to represent acids that can be used as surface etchant before adhesive luting of ceramic restorations, placement of orthodontic brackets or repair of chipped porcelain restorations. Chemical reactions, application protocol, and etching effect are presented as well.STUDY SELECTION: Available scientific articles published in PubMed and Scopus literature databases, scientific reports and manufacturers' instructions and product information from internet websites, written in English, using following search terms: “acid etching, ceramic surface treatment, hydrofluoric acid, acidulated phosphate fluoride, ammonium hydrogen bifluoride”, have been reviewed.RESULTS: There are several acids with fluoride ion in their composition that can be used as ceramic surface etchants. The etching effect depends on the acid type and its concentration, etching time, as well as ceramic type. The most effective etching pattern is achieved when using hydrofluoric acid; the numerous micropores and channels of different sizes, honeycomb-like appearance, extruded crystals or scattered irregular ceramic particles, depending on the ceramic type, have been detected on the etched surfaces.CONCLUSION: Acid etching of the bonding surface of glass - ceramic restorations is considered as the most effective treatment method that provides a reliable bond with composite cement. Selective removing of the glassy matrix of silicate ceramics results in a micromorphological three-dimensional porous surface that allows micromechanical interlocking of the luting composite.

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Few-Layered MoS2 Nanoparticles Loaded TiO2 Nanosheets with Exposed {001} Facets for Enhanced Photocatalytic Activity

NANO ◽

10.1142/s1793292018501291 ◽

2018 ◽

Vol 13 (11) ◽

pp. 1850129 ◽

Cited By ~ 4

Author(s):

Chujun Chen ◽

Xia Xin ◽

Jinniu Zhang ◽

Gang Li ◽

Yafeng Zhang ◽

...

Keyword(s):

Photocatalytic Activity ◽

Charge Carrier ◽

Visible Light ◽

Recombination Rate ◽

Active Species ◽

Molar Ratio ◽

Carrier Recombination ◽

Tio2 Nanosheets ◽

Photocatalytic Activities ◽

Charge Carrier Recombination

To improve the high charge carrier recombination rate and low visible light absorption of {001} facets exposed TiO2 [TiO2(001)] nanosheets, few-layered MoS2 nanoparticles were loaded on the surfaces of TiO2(001) nanosheets by a simple photodeposition method. The photocatalytic activities towards Rhodamine B (RhB) were investigated. The results showed that the MoS2–TiO2(001) nanocomposites exhibited much enhanced photocatalytic activities compared with the pure TiO2(001) nanosheets. At an optimal Mo/Ti molar ratio of 25%, the MoS2–TiO2(001) nanocomposites displayed the highest photocatalytic activity, which took only 30[Formula: see text]min to degrade 50[Formula: see text]mL of RhB (50[Formula: see text]mg/L). The active species in the degradation reaction were determined to be h[Formula: see text] and [Formula: see text]OH according to the free radical trapping experiments. The reduced charge carrier recombination rate, enhanced visible light utilization and increased surface areas contributed to the enhanced photocatalytic performances of the 25% MoS2–TiO2(001) nanocomposites.

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