Study of the stability of lead halide perovskite under two different fluoropolymer top coatings

MRS Advances ◽  
2020 ◽  
Vol 5 (8-9) ◽  
pp. 377-383 ◽  
Author(s):  
Fatemeh Khorramshahi ◽  
Arash Takshi
Keyword(s):  
Indium Tin Oxide ◽  
Low Cost ◽  
Flexible Substrate ◽  
Laser Source ◽  
Self Healing ◽  
X Ray Diffraction ◽  
Step Method ◽  
Halide Perovskite ◽  
The Stability ◽  
Lead Halide

AbstractIn this work, lead halide perovskite photodetectors were fabricated by a laser-assisted rapid fabrication method. A microchannel was engraved on an indium tin oxide (ITO) coated polyethylene terephthalate (PET) conductive flexible substrate using a CO2 laser source. The channels were filled by methylammonium lead halide perovskite (CH3NH3PbI3) using the capillary motion of perovskite first-step method precursor. CYTOP and the low-cost commercially available FluroPel were used as a top protective coating layer to suppress the decomposition of the perovskite channel. X-ray diffraction pattern (XRD) was used to measure the stability of the perovskite. Strong humidity resistant and self-healing behavior were observed in both devices. The performance of the photodetectors was compared by measuring electrical and optical characteristics over time. This study will help in the low-cost fabrication of perovskite-based devices.

scholarly journals Exploring the Structural Competition between the Black and the Yellow Phase of CsPbI3

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1282
Author(s):  
Ioannis Deretzis ◽  
Corrado Bongiorno ◽  
Giovanni Mannino ◽  
Emanuele Smecca ◽  
Salvatore Sanzaro ◽  
...  
Keyword(s):  
Perovskite Phase ◽  
Low Cost ◽  
Δ Phase ◽  
Nanocrystalline Structures ◽  
Halide Perovskites ◽  
The Stability ◽  
Structural Competition ◽  
Lead Halide ◽  
Main Candidate ◽  
Spontaneous Phase

The realization of stable inorganic perovskites is crucial to enable low-cost solution-processed photovoltaics. However, the main candidate material, CsPbI3, suffers from a spontaneous phase transition at room temperature towards a photo-inactive orthorhombic δ-phase (yellow phase). Here we used theoretical and experimental methods to study the structural and electronic features that determine the stability of the CsPbI3 perovskite. We argued that the two physical characteristics that favor the black perovskite phase at low temperatures are the strong spatial confinement in nanocrystalline structures and the level of electron doping in the material. Within this context, we discussed practical procedures for the realization of long-lasting inorganic lead halide perovskites.

Control by Mixed-Chloride Additives of the Quality and Homogeneity of Bulk Halide Perovskite upon Film Formation Process

2021 ◽  
Author(s):  
Thierry Pauporté ◽  
Daming zheng
Keyword(s):  
Solar Cells ◽  
Formation Process ◽  
High Efficiency ◽  
Film Formation ◽  
Perovskite Solar Cells ◽  
X Ray Diffraction ◽  
X Ray ◽  
Stability Issue ◽  
Halide Perovskite ◽  
The Stability

Nowadays, overcoming the stability issue of perovskite solar cells (PSCs) while keeping high efficiency has become an urgent need for the future of this technology. By using x-ray diffraction (XRD),...

Reduction of lead leakage from damaged lead halide perovskite solar modules using self-healing polymer-based encapsulation

Nature Energy ◽  
2019 ◽  
Vol 4 (7) ◽  
pp. 585-593 ◽  
Author(s):  
Yan Jiang ◽  
Longbin Qiu ◽  
Emilio J. Juarez-Perez ◽  
Luis K. Ono ◽  
Zhanhao Hu ◽  
...  
Keyword(s):  
Self Healing ◽  
Halide Perovskite ◽  
Lead Halide

scholarly journals Chelating Agent: The Health Protector of Researchers in Lead Halide Perovskite Laboratory

2020 ◽  
Author(s):  
Yu-Hao Deng
Keyword(s):  
Low Cost ◽  
Health Hazard ◽  
Optoelectronic Devices ◽  
Chelating Agent ◽  
The Body ◽  
Lead Ions ◽  
Laboratory Safety ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Lead Halide

<p>Lead halide perovskites have achieved substantial success in various optoelectronic devices owing to their remarkable physical properties. However, lead (Pb) as a heavy metal, long-lasting toxic to the body has become a health hazard for researchers. How to completely remove the residual lead in the laboratory and prevent lead from entering the human body have always been an important topic in laboratory safety. Here we develop an operable method to treat lead sources with low-cost and eco-friendly chelating agent (EDTA-2Na), which can reduce the concentration of free lead ions to 10<sup>-11 </sup>ppm theoretically. Moreover, experiments have demonstrated that the chelating agent possess a strong ability on the removal of lead ions from the lab surface, gloves and lab coats. This approach paves the way to protect the health of researchers in lead halide perovskite laboratory. </p>

scholarly journals The Influence of the Preparation and Stability of Nanofluids for Heat Transfer

2019 ◽  
Vol 25 (4) ◽  
pp. 45-54 ◽  
Author(s):  
Noor Sabih Majeed ◽  
Basma A. Abdulmajeed ◽  
Anwar Khudhur Yaseen
Keyword(s):  
Heat Transfer ◽  
Electron Microscopy ◽  
Base Fluid ◽  
X Ray Diffraction ◽  
Step Method ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
The Stability ◽  
Scanning Electron

Recently the use of nanofluids represents very important materials. They are used in different branches like medicine, engineering, power, heat transfer, etc. The stability of nanofluids is an important factor to improve the performance of nanofluids with good results. In this research two types of nanoparticles, TiO2 (titanium oxide) and γ-Al2O3 (gamma aluminum oxide) were used with base fluid water. Two-step method were used to prepare the nanofluids. One concentration 0.003 vol. %, the nanoparticles were examined. Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and X-ray diffraction (XRD) were used to accomplish these tests. The stability of the two types of nanofluids is measured by zeta potential and UV-vis spectrophotometer. The results showed that γ-Al2O3/water has more stable than TiO2/ water for the same period of time.  

Formation of highly uniform thinly-wrapped CsPbX3@silicone nanocrystals via self-hydrolysis: suppressed anion exchange and superior stability in polar solvents

2019 ◽  
Vol 7 (32) ◽  
pp. 9813-9819 ◽  
Author(s):  
Haifeng Zhao ◽  
Linfeng Wei ◽  
Peng Zeng ◽  
Mingzhen Liu
Keyword(s):  
Crystal Lattice ◽  
Anion Exchange ◽  
Polar Solvents ◽  
Perovskite Nanocrystals ◽  
Ionic Nature ◽  
Halide Perovskite ◽  
The Stability ◽  
Highly Uniform ◽  
Lead Halide

Cesium lead halide perovskite nanocrystals show promising potential in optical and photonic applications, whereas it is challenging to improve the stability of nanocrystals due to their highly ionic nature and inconsistency in the crystal lattice.

scholarly journals Synthesis of ZnO Nanorod Film Deposited by Spraying with Application for Flexible Piezoelectric Energy Harvesting Microdevices

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6759
Author(s):  
Ernesto A. Elvira-Hernández ◽  
Jorge Romero-García ◽  
Antonio Ledezma-Pérez ◽  
Agustín L. Herrera-May ◽  
Ernesto Hernández-Hernández ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Indium Tin Oxide ◽  
Vibrational Energy ◽  
Low Cost ◽  
Flexible Substrate ◽  
Morphological Characteristics ◽  
Electrical Energy ◽  
Flexible Substrates ◽  
Zno Nanorod ◽  
Piezoelectric Energy

Industry 4.0 and the Internet of Things have significantly increased the use of sensors and electronic products based on flexible substrates, which require electrical energy for their performance. This electrical energy can be supplied by piezoelectric vibrational energy harvesting (pVEH) devices. These devices can convert energy from ambient mechanical excitations into electrical energy. In order to develop, these devices require piezoelectric films fabricated with a simple and low-cost process. In this work, we synthesize ZnO nanorod film by a solvothermal method and deposit by spraying on ITO (indium-tin-oxide)/PET (polyethylene terephthalate) flexible substrate for a pVEH microdevice. The results of the characterization of the ZnO nanorod film using X-ray diffraction (XRD) confirm the typical reflections for this type of nanomaterial (JCPDS 36-145). Based on transmission electron microscopy (TEM) images, the size of the nanorod film is close to 1380 nm, and the average diameter is 221 ± 67 nm. In addition, the morphological characteristics of the ZnO nanorod film are obtained using atomic force microscopy (AFM) tapping images. The pVEH microdevice has a resonant frequency of 37 Hz, a generated voltage and electrical power of 9.12 V and 6.67 μW, respectively, considering a load resistance of 107.7 kΩ and acceleration of 1.5 g. The ZnO nanorod film may be applied to pVEH microdevices with flexible substrates using a low-cost and easy fabrication process.

Controlling the growth of a SiO2 coating on hydrophobic CsPbBr3 nanocrystals towards aqueous transfer and high luminescence

Nanoscale ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 3860-3867
Author(s):  
Meng Li ◽  
Xiao Zhang ◽  
Ping Yang
Keyword(s):  
Silica Coating ◽  
Sio2 Coating ◽  
Stability Issue ◽  
Halide Perovskite ◽  
The Stability ◽  
Lead Halide

Silica coating can effectively solve the stability issue of lead halide perovskite nanomaterials.

Hybrid Inorganic/Organic Self-Assembled Clays Nanocomposites for Roll to Roll Fabrication in Photovoltaics

2009 ◽  
Vol 1196 ◽  
Author(s):  
Peter Njagwa Kariuki ◽  
Jessica Gendron ◽  
Christopher Matthew Madl ◽  
Jasper Chiguma ◽  
Michael E Hagerman ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Indium Tin Oxide ◽  
Self Assembly ◽  
Titanium Dioxide Nanoparticles ◽  
Low Cost ◽  
Flexible Substrate ◽  
Roll To Roll ◽  
Organic Photovoltaic Materials ◽  
Self Assembled ◽  
Electrically Conducting Polymers

AbstractWe have been developing a new approach to layered hybrid (inorganic/organic) photovoltaic materials for fabrication by Roll-to-Roll (R2R) manufacturing. In this report, we combine the low cost and processability of organic electrically conducting polymers with the efficiency of dye sensitized titanium dioxide, semi-conductor quantum dots (CdSe) self-assembled on layered clay materials (Laponite) onto indium tin oxide coated flexible substrate polyethylene terephthalate (PET) substrates. We have shown electron transfer, guest-guest and host-guest interactions, charge separation, spectral line broadening, and quenching of fluorescence signals which indicate electronic coupling of the dye [Ru(bpy)3]2+ on a CdSe nanocrystal and titanium dioxide nanoparticles. Scanning electron microscopy and atomic force microscopy demonstrate successful nanoparticle formation and thin film self-assembly, as well as surface morphology and polymer thickness.

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