scholarly journals Understanding liquefaction in halide perovskites upon methylamine gas exposure

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20423-20428
Author(s):  
Wencai Zhou ◽  
Zilong Zheng ◽  
Yue Lu ◽  
Manling Sui ◽  
Jun Yin ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Power ◽  
Photovoltaic Materials ◽  
Halide Perovskites ◽  
Gas Exposure

Methylamine (CH3NH2, MA) gas-induced fabrication of organometal CH3NH3PbI3 based perovskite thin films are promising photovoltaic materials that transform the energy from absorbed sunlight into electrical power.

scholarly journals Nanometer-Thick [(FPEA)2PbX4; X=I, Br] 2D Halide Perovskite Based Thin Films for Pollutant Detection and Nonconventional Photocatalytic Degradation

2021 ◽  
Author(s):  
Arindam Mondal ◽  
Akash Lata ◽  
Aarya Prabhakaran ◽  
Satyajit Gupta
Keyword(s):  
Thin Films ◽  
Photocatalytic Degradation ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Reduced Dimensionality ◽  
P Application ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Pollutant Detection

Application of three-dimensional (3D)-halide perovskites (HaP) in photocatalysis encourages the new exercise with two-dimensional (2D) HaP based thin-films for photocatalytic degradation of dye. The reduced dimensionality to 2D-HaPs, with a...

scholarly journals Enhanced control of self-doping in halide perovskites for improved thermoelectric performance

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Tianjun Liu ◽  
Xiaoming Zhao ◽  
Jianwei Li ◽  
Zilu Liu ◽  
Fabiola Liscio ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Surface Layer ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Sacrificial Layer ◽  
Fine Tuning ◽  
Photovoltaic Materials ◽  
Chlorine Doping ◽  
Halide Perovskites ◽  
Transport Region

AbstractMetal halide perovskites have emerged as promising photovoltaic materials, but, despite ultralow thermal conductivity, progress on developing them for thermoelectrics has been limited. Here, we report the thermoelectric properties of all-inorganic tin based perovskites with enhanced air stability. Fine tuning the thermoelectric properties of the films is achieved by self-doping through the oxidation of tin (ΙΙ) to tin (ΙV) in a thin surface-layer that transfers charge to the bulk. This separates the doping defects from the transport region, enabling enhanced electrical conductivity. We show that this arises due to a chlorine-rich surface layer that acts simultaneously as the source of free charges and a sacrificial layer protecting the bulk from oxidation. Moreover, we achieve a figure-of-merit (ZT) of 0.14 ± 0.01 when chlorine-doping and degree of the oxidation are optimised in tandem.

scholarly journals Comment on “ferroelectricity-free lead halide perovskites” by A. Gómez, Q. Wang, A. R. Goñi, M. Campoy-Quiles and A. Abate, Energy Environ. Sci., 2019, 12, 2537

2020 ◽  
Vol 13 (6) ◽  
pp. 1888-1891
Author(s):  
Alexander Colsmann ◽  
Tobias Leonhard ◽  
Alexander D. Schulz ◽  
Holger Röhm
Keyword(s):  
Thin Films ◽  
Metal Halide ◽  
Organic Metal ◽  
Metal Halide Perovskite ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Lead Halide ◽  
Energy Environ

This comment analyzes pitfalls when investigating piezoresponse and ferroelectricity in organic-metal halide perovskite thin films.

scholarly journals Origin of Sn(ii) oxidation in tin halide perovskites

2020 ◽  
Vol 1 (5) ◽  
pp. 1066-1070
Author(s):  
Jorge Pascual ◽  
Giuseppe Nasti ◽  
Mahmoud H. Aldamasy ◽  
Joel A. Smith ◽  
Marion Flatken ◽  
...  
Keyword(s):  
Photovoltaic Materials ◽  
Halide Perovskites

Tin-halide perovskites have great potential as photovoltaic materials, but their performance is hampered by undesirable oxidation of Sn(ii) to Sn(iv). NMR proves DMSO to be a main cause of oxidation.

scholarly journals Structure and chemical stability in perovskite–polymer hybrid photovoltaic materials

2019 ◽  
Vol 7 (4) ◽  
pp. 1687-1699 ◽  
Author(s):  
Daniel J. Fairfield ◽  
Hiroaki Sai ◽  
Ashwin Narayanan ◽  
James V. Passarelli ◽  
Michelle Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Chemical Stability ◽  
Environmental Conditions ◽  
Polymer Hybrid ◽  
Photovoltaic Materials ◽  
Hybrid Thin Films ◽  
Improved Stability

Chemical and morphological origins of the improved stability in various polymer–perovskite hybrid thin films under ambient environmental conditions are investigated.

Thermoelectric Module of P-Type Ca-Co-O/N-Type ZnO Thin Films

2012 ◽  
Vol 622-623 ◽  
pp. 726-733 ◽  
Author(s):  
Weerasak Somkhunthot ◽  
Nuwat Pimpabute ◽  
Tosawat Seetawan
Keyword(s):  
Thin Films ◽  
Electrical Resistivity ◽  
Seebeck Coefficient ◽  
Power Factor ◽  
Electrical Power ◽  
Thermoelectric Module ◽  
Preliminary Test ◽  
Internal Resistance ◽  
Open Circuit ◽  
P Type

Thin films thermoelectric module fabricated by pulsed-dc magnetron sputtering system using Ca3Co4O9(p-type) and ZnO (n-type) targets of 60 mm diameter and 2.5 mm thickness, which were made from powder precursor, and obtained by solid state reaction. Thin films of p-Ca-Co-O (Seebeck coefficient = 143.85 µV/K, electrical resistivity = 4.80 mΩm, power factor = 4.31 µW/m K2) and n-ZnO (Seebeck coefficient =229.24 µV/K, electrical resistivity = 5.93 mΩm, power factor = 8.86 µW/m K2) were used to make a thermoelectric module, which consist of four pairs of legs connected by copper electrodes (0.5 mm thickness, 3.0 mm width, and 3.0-8.0 mm length). Each leg is 3.0 mm width, 20.0 mm length, and 0.44 µm thickness on a glass substrate of 1.0 mm thickness in dimension 25.0x50.0 mm2. For preliminary test, a module was used to thermoelectric power generation. It was found that the open circuit voltage increased with increasing temperature difference from 3 mV at 5 K up to 20 mV at 78 K. The internal resistance of a module reached a value of 14.52 MΩ. This test indicated that a module can be generated the electrical power. Therefore, it can be used as an important platform for further thin films thermoelectric module research.

scholarly journals Interaction of light with lead halide perovskites: A review

2019 ◽  
Vol 2 (2) ◽  
pp. 67
Author(s):  
Zhiya Dang ◽  
Duc Anh Dinh
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Light Illumination ◽  
Low Light ◽  
Practical Applications ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
First Time ◽  
Lead Halide ◽  
Sample Environment

Lead halide perovskites are the new rising generation of semiconductor materials due to their unique optical and electrical properties. The investigation of the interaction of halide perovskites and light is a key issue not only for understanding their photophysics but also for practical applications. Hence, tremendous efforts have been devoted to this topic and brunch into two: (i) decomposition of the halide perovskites thin films under light illumination; and (ii) influence of light soaking on their photoluminescence (PL) properties. In this review, we for the first time thoroughly compare the illumination conditions and the sample environment to correlate the PL changes and decomposition of perovskite under light illumination. In the case of vacuum and dry nitrogen, PL of the halide perovskite (MAPbI3–xClx, MAPbBr3–xClx, MAPbI3) thin films decreases due to the defects induced by light illumination, and under high excitations, the thin film even decomposes. In the presence of oxygen or moisture, light induces the PL enhancement of halide perovskite (MAPbI3) thin films at low light illumination, while increasing the excitation, which causes the PL to quench and perovskite thin film to decompose. In the case of mixed halide perovskite ((MA)Pb(BrxI1-x)3) light induces reversible segregation of Br domains and I domains. 

scholarly journals REDUCING CLIMATE CHANGE BY INSTALLING A NEW PHOTOVOLTAIC POWER PLANT IN BULGARIA

2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Plamen Tsankov
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Crystalline Silicon ◽  
Electrical Power ◽  
Operating Characteristics ◽  
Pv System ◽  
Photovoltaic Materials ◽  
Photovoltaic Power ◽  
Copper Indium ◽  
Simultaneous Testing

Three new roof-mounted 10 kWp grid-connected photovoltaic (PV) power plants have been constructed in the Technology Park at the Technical University of Gabrovo, Bulgaria, as part of a project "Competence Center – Intelligent Mechatronic, Eco, and Energy Saving Systems and Technologies". Three different PV modules types have been used: monocrystalline silicon (mono-Si), cadmium telluride (CdTe), and copper indium gallium selenide (CIGS). New three power plants, together with the existing amorphous silicon and poly-crystalline silicon photovoltaic power plants at the TU-Gabrovo enhanced simultaneous testing of five different photovoltaic materials. A small 500 Wp mono-Si photovoltaic thermal hybrid solar collectors (PVT) PV system has also been constructed. The power plants feature a monitoring system for the meteorological and electrical operating parameters, which measures, displays, and stores data on solar radiation, temperature, wind speed, currents, voltages, and electrical power of each power plant. PV plants components' technical characteristics are given in the paper. The schemes describing the basic wiring diagram, disposition of the three PV subsystems on the roof of the building at the technology center have also been presented. The initial comparative software data for monitoring of meteorological and electrical operating characteristics of the three different types of PV subsystems are shown as well. According to the specific ecological equivalent of energy resources and energy for the region of Bulgaria, the data are presented on the saved CO2 emissions from the avoided production and transmission of electricity owing to the operation of photovoltaic power plants.

Properties and applications of hybrid organic-inorganic halide perovskites thin films

2020 ◽  
Author(s):  
Anna Zawadzka ◽  
Agnieszka Marjanowska ◽  
Przemysław Płóciennik ◽  
Andrzej Korcala ◽  
Krzysztof Wisniewski ◽  
...  
Keyword(s):  
Thin Films ◽  
Halide Perovskites

scholarly journals Two-Step Synthesis of Bismuth-Based Hybrid Halide Perovskite Thin-Films

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7827
Author(s):  
Vanira Trifiletti ◽  
Sally Luong ◽  
Giorgio Tseberlidis ◽  
Stefania Riva ◽  
Eugenio S. S. Galindez ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Good Alternative ◽  
Bismuth Iodide ◽  
Earth Abundant ◽  
Low Toxicity ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Scalable Methods ◽  
Lead Halide

Lead halide perovskites have been revolutionary in the last decade in many optoelectronic sectors. Their bismuth-based counterparts have been considered a good alternative thanks to their composition of earth-abundant elements, good chemical stability, and low toxicity. Moreover, their electronic structure is in a quasi-zero-dimensional (0D) configuration, and they have recently been explored for use beyond optoelectronics. A significant limitation in applying thin-film technology is represented by the difficulty of synthesizing compact layers with easily scalable methods. Here, the engineering of a two-step synthesis in an air of methylammonium bismuth iodide compact thin films is reported. The critical steps of the process have been highlighted so that the procedure can be adapted to different substrates and application areas.

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