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1. Effects of Pb doping on the electrical transport performance of Cu1.98Se

Author:
Li, Hanyang; Du, Xueli; Cao, Lei; Guo, Xiaohui; Yuan, Zhihao
Source:
Journal of materials science 2020 v.55 no.7 pp. 2905-2912
ISSN:
0022-2461
Subject:
lead,   etc   ; copper; ions; selenides;     Show all 4 Subjects
Abstract:
... Cu₂₋δSe is an eco-friendly thermoelectric candidate owing to Cu ions migration in its high-temperature beta phase, and meanwhile the liquid-like Cu ions deteriorate the stability and reliability of materials. Here, Pb²⁺ ion was introduced into the Cu₁.₉₈Se lattice to improve the thermoelectric properties and the stability. The Pb-doped Cu₁.₉₈₋ₓPbₓSe (x = 0–0.035) compounds prepared by a facile sol ...
DOI:
10.1007/s10853-019-04242-9

2. Mechanisms of Oxygen Passivation on Surface Defects in MAPbI₃ Revealed by First-Principles Study

Author:
Zhou, Yipeng; Hu, Xixi; Xie, Daiqian; Tian, Yuxi
Source:
Journal of physical chemistry 2020 v.124 no.6 pp. 3731-3737
ISSN:
1932-7455
Subject:
lead,   etc   ; adsorption; minerals; oxygen;     Show all 4 Subjects
Abstract:
... Perovskite materials have shown ultrasensitivity to atmospheres especially to O₂, which is due to the passivation effect of the surface defects. Identification of the chemical nature of the surface defects is thus of crucial importance for fundamental understanding of these materials, which is extremely difficult by experimental characterization. In this work, we systematically studied the adsorpt ...
DOI:
10.1021/acs.jpcc.0c00157

3. Lead-Free Perovskite/Organic Semiconductor Vertical Heterojunction for Highly Sensitive Photodetectors

Author:
Liu, Chun-Ki; Tai, Qidong; Wang, Naixiang; Tang, Guanqi; Hu, Zhao; Yan, Feng
Source:
ACS applied materials & interfaces 2020 v.12 no.16 pp. 18769-18776
ISSN:
1944-8252
Subject:
lead,   etc   ; halides; human health; semiconductors;     Show all 4 Subjects
Abstract:
... In recent years, photodetectors based on organic–inorganic lead halide perovskites have been studied extensively. However, the inclusion of lead in those materials can cause severe human health and environmental problems, which is undesirable for practical applications. Here, we report high-performance photodetectors with a tin-based perovskite/PEDOT:PSS vertical heterojunction. The device demonst ...
DOI:
10.1021/acsami.0c01202

4. Syringe Pump Created using 3D Printing Technology and Arduino Platform

Author:
Samokhin, A. S.
Source:
Journal of analytical chemistry 2020 v.75 no.3 pp. 416-421
ISSN:
1061-9348
Subject:
lead,   etc   ; soldering; syringes; three-dimensional printing;     Show all 4 Subjects
Abstract:
... An open-source syringe pump has been developed for use in the analytical laboratory. Most pump parts are made on a 3D printer. Other parts (lead screw, guide rods, stepper motor, bearings, electronic components) are purchased in specialized stores. The control panel is based on the Arduino UNO. Device interaction, any settings changes, and operating mode selection are carried out using the LCD Key ...
DOI:
10.1134/S1061934820030156

5. Substitutional Doping of Yb³⁺ in CsPbBrₓCl₃–ₓ Nanocrystals

Author:
Lesage, Arnon; van der Laan, Marco; Gomez, Leyre; Gregorkiewicz, Tom
Source:
Journal of physical chemistry 2020 v.124 no.11 pp. 6413-6417
ISSN:
1932-7455
Subject:
lead,   etc   ; energy; ions; nanocrystals; photons; semiconductors; ytterbium;     Show all 7 Subjects
Abstract:
... Lead halide perovskite nanocrystals (NCs) have been widely studied in recent years because of their huge application potential as a cost-effective UV–vis semiconductor. On the other hand, introduction of rare-earth (RE) ions is a popular way to modify the photonic properties of semiconductors because of their sharp electronic transitions in vis–NIR. However, with small absorption cross sections, f ...
DOI:
10.1021/acs.jpcc.9b11393

6. Growth of High-Quality Superconducting FeSe₀.₅Te₀.₅ Films on Pb(Mg₁/₃Nb₂/₃)₀.₇Ti₀.₃O₃ and Electric-Field Modulation of Superconductivity

Author:
Mei, Chenguang; Lin, Zhu; Zhang, Ruixin; Xu, Chengchao; Huang, Haoliang; Dong, Yongqi; Meng, Miao; Gao, Ye; Zhang, Xi; Zhang, Qinghua; Gu, Lin; Yang, Huaixin; Tian, Huanfang; Li, Jianqi; Lu, Yalin; Zhang, Guangming; Zhao, Yonggang
Source:
ACS applied materials & interfaces 2020 v.12 no.10 pp. 12238-12245
ISSN:
1944-8252
Subject:
lead,   etc   ; electric field; iron; superconductivity; temperature;     Show all 5 Subjects
Abstract:
... Heterostructures composed of superconductor and ferroelectrics (SC/FE) are very important for manipulating the superconducting property and applications. However, growth of high-quality superconducting iron chalcogenide films is challenging because of their volatility and FE substrate with rough surface and large lattice mismatch. Here, we report a two-step growth approach to get high-quality FeSe ...
DOI:
10.1021/acsami.9b18749

7. Pb and Li co-doped NiOx for efficient inverted planar perovskite solar cells

Author:
Hou, Dagang; Zhang, Jing; Gan, Xinlei; Yuan, Haobo; Yu, Luting; Lu, Chaojie; Sun, Hongrui; Hu, Ziyang; Zhu, Yuejin
Source:
Journal of colloid and interface science 2020 v.559 pp. 29-38
ISSN:
0021-9797
Subject:
lead,   etc   ; electrodes; lithium; metal ions; solar cells;     Show all 5 Subjects
Abstract:
... Organic-inorganic halide perovskites solar cells have garnered increasing attention in recent years due to the dramatic rise in power conversion efficiencies (PCEs). In perovskite solar cells (PSCs), selecting appropriate hole transport materials to insert between perovskite layer and electrodes can improve Schottky contact, facilitate the hole transport, therefore reduce charge recombination, and ...
DOI:
10.1016/j.jcis.2019.09.087

8. All-Inorganic Halide Perovskite Alloy Nanowire Network Photodetectors with High Performance

Author:
Tang, Xiaoming; Zhou, Hai; Pan, Xiyan; Liu, Ronghuan; Wu, Dingjun; Wang, Hao
Source:
ACS applied materials & interfaces 2020 v.12 no.4 pp. 4843-4848
ISSN:
1944-8252
Subject:
lead,   etc   ; air; alloys; bromine; nanowires; tin; toxicity;     Show all 7 Subjects
Abstract:
... Organic–inorganic hybrid lead halide perovskites have attracted much attention in the photoelectric field due to their excellent characteristics, such as a tunable band gap, simple fabrication process, and high photoelectric conversion efficiency. However, the commercialization of the perovskite-based devices still faces many challenges, one of which is the inclusion of the toxic lead. Herein, we ...
DOI:
10.1021/acsami.9b21666

9. Lead Acetate Assisted Interface Engineering for Highly Efficient and Stable Perovskite Solar Cells

Author:
Zhang, Yuanyuan; Ma, Yongchao; Shin, Insoo; Jung, Yun Kyung; Lee, Bo Ram; Wu, Sangwook; Jeong, Jung Hyun; Lee, Byoung Hoon; Kim, Joo Hyun; Kim, Kwang Ho; Park, Sung Heum
Source:
ACS applied materials & interfaces 2020 v.12 no.6 pp. 7186-7197
ISSN:
1944-8252
Subject:
lead; lead acetate,   etc   ; crystal structure; energy; solar cells; solar energy; sulfonates;     Show all 7 Subjects
Abstract:
... High power conversion efficiency (PCE) and long-term stability are inevitable issues faced in practical device applications of perovskite solar cells. In this paper, significant enhancements in the device efficiency and stability are achieved by using a surface-active lead acetate (Pb(OAc)₂) at the top or bottom of CH₃NH₃PbI₃ (MAPbI₃)-based perovskite. When a saturated Pb(OAc)₂ solution is introdu ...
DOI:
10.1021/acsami.9b19691

10. A new inverse distance model to calculate the percentage contribution of various Pb sources

Author:
Deng, Wenbo; Liu, Wenjuan; Wen, Yongli; Li, Xuxiang
Source:
Environmental research 2020 v.185 pp. 109475
ISSN:
0013-9351
Subject:
lead,   etc   ; anthropogenic activities; equations; isotopes; mixing; soil; China;     Show all 7 Subjects
Abstract:
... Lead (Pb) isotopic composition analysis is a useful tool to accurately identify the origin of Pb in environmental media. The existing calculation method of the contribution of Pb sources from Pb isotope ratios greatly restricted the development of Pb contamination source apportionment. In the present study, a new distance model for calculating the mass proportion of Pb sources, which is based on t ...
DOI:
10.1016/j.envres.2020.109475

11. Effects of some heavy metals on thiol compounds in Synechocystis sp. isolates

Author:
Yılmaz, E. Ş.; Öztürk, Ş.; Aslım, B.
Source:
International journal of environmental science and technology 2020 v.17 no.5 pp. 3013-3022
ISSN:
1735-1472
Subject:
lead,   etc   ; Synechocystis; chromium; heavy metals; metal tolerance; nickel; thiols; toxicity;     Show all 8 Subjects
Abstract:
... The study aims to investigate the role of protein-bound, nonprotein and total thiols in metal resistance of Synechocystis isolates exposed to Ni(II), Cr(IV) and Pb(II). Synechocystis sp. BASO403 and BASO404 were investigated with regard to their exposure to 15 ppm Ni(II), 5 ppm Cr(VI) and 100 ppm Pb(II) for metal toxicity and thiol production. Each isolate was effected by metals when compared with ...
DOI:
10.1007/s13762-020-02709-w

12. Precise Regulation of Carrier Concentration in Thermoelectric BiSbTe Alloys via Magnetic Doping

Author:
Wei, Zichen; Wang, Chenyang; Zhang, Jiye; Yang, Jiong; Li, Zhili; Zhang, Qidong; Luo, Pengfei; Zhang, Wenqing; Liu, Enke; Luo, Jun
Source:
ACS applied materials & interfaces 2020 v.12 no.18 pp. 20653-20663
ISSN:
1944-8252
Subject:
lead,   etc   ; activation energy; alloys; ambient temperature; cobalt; ferromagnetism; iron; solubility;     Show all 8 Subjects
Abstract:
... The Bi₂Te₃-based alloy is the best commercial thermoelectric material around room temperature, although it is extremely difficult to further improve its thermoelectric performance. In this work, we demonstrate that magnetic doping is an effective strategy to regulate the thermoelectric performance of p-type Bi₀.₅Sb₁.₅Te₃. According to our experiments, it is much more difficult for ferromagnetic Fe ...
DOI:
10.1021/acsami.0c02408

13. Broadband Emission Enhancement Induced by Self-Trapped Excited States in One-Dimensional EAPbI₃ Perovskite under Pressure

Author:
Liang, Yongfu; Zang, Yifan; Huang, Xiaoli; Tian, Can; Wang, Xin; Cui, Tian
Source:
Journal of physical chemistry 2020 v.124 no.16 pp. 8984-8991
ISSN:
1932-7455
Subject:
lead,   etc   ; chemical bonding; energy; iodides; phase transition; rooting;     Show all 6 Subjects
Abstract:
... Ethylammonium lead iodide (C₂H₅NH₃PbI₃) with a unique one-dimensional structure is presented as a new organic–inorganic halide perovskite among the emerging photoactive materials. Here, we have discovered that C₂H₅NH₃PbI₃ can easily undergo structural distortion and enable a strong quantum confinement that generates double emission enhancement and gives a 5-fold enhanced broadband emission under p ...
DOI:
10.1021/acs.jpcc.0c01553

14. From Metallic Lead Films to Perovskite Solar Cells through Lead Conversion with Polyhalide Solutions

Author:
Belich, Nikolai A.; Petrov, Andrey A.; Rudnev, Pavel O.; Stepanov, Nikita M.; Turkevych, Ivan; Goodilin, Eugene A.; Tarasov, Alexey B.
Source:
ACS applied materials & interfaces 2020 v.12 no.18 pp. 20456-20461
ISSN:
1944-8252
Subject:
lead,   etc   ; films (materials); iodine; oxidation; solar cells; solar energy; vapors;     Show all 7 Subjects
Abstract:
... Solutions of methylammonium and formamidinium polyhalides (AX₁₊ₙ, A = MA, FA, X = I, Br) in isopropanol are introduced as novel versatile precursors for the fabrication of APbX₃ hybrid perovskite thin films via oxidation of metallic Pb. The polyhalide solution with adjustable reactivity is distributed over a metallic Pb layer followed by iodine vapor postprocessing to tune the morphology and compo ...
DOI:
10.1021/acsami.0c02492

15. Conduction of a round-robin test on a real sample for the identification of gunshot residues by SEM/EDX

Author:
Charles, Sébastien; Dodier, Thierry; Kaindl, Monika; Kastéropoulos, Alain; Knijnenberg, Alwin; Larsson, Marcus; Lauper, Sandrine; Merat, Nadine; Niewoehner, Ludwig; Scholz, Thomas; Simon, Laurence
Source:
Forensic science international 2020 v.309 pp. 110183
ISSN:
0379-0738
Subject:
lead,   etc   ; algorithms; antimony; barium; case studies; risk; surveys;     Show all 7 Subjects
Abstract:
... A round-robin test on the identification of GSR particles by SEM/EDX and involving eleven Institutes was conducted on a real sample, in order to evaluate the possibilities/limitations of using such sample to get additional information (compared to the analysis of the usual synthetic sample used within the framework of the ENFSI proficiency test) about the performances of the SEM/EDX systems. Each ...
DOI:
10.1016/j.forsciint.2020.110183

16. To trace or not to trace: A survey of how police use and perceive chemical trace evidence

Author:
Woodman, Peter A.; Julian, Roberta; Spiranovic, Caroline; Ballantyne, Kaye N.
Source:
Forensic science international 2020 v.309 pp. 110178
ISSN:
0379-0738
Subject:
lead,   etc   ; decision making; forensic sciences; police; surveys; Victoria (Australia);     Show all 6 Subjects
Abstract:
... There is limited information available about the impact of chemical trace evidence and it has tended to be anecdotal and mostly pertaining to court outcomes. Very little is known about the use of chemical trace evidence by police investigators or the impact that this evidence form has on criminal investigations. This survey, which was conducted in Victoria, Australia, was aimed at addressing these ...
DOI:
10.1016/j.forsciint.2020.110178

17. Efficient All-Inorganic Perovskite Light-Emitting Diodes with Improved Operation Stability

Author:
Cheng, Guoqing; Liu, Yan; Chen, Tao; Chen, Wenjing; Fang, Zhibin; Zhang, Ji; Ding, Liming; Li, Xinhua; Shi, Tongfei; Xiao, Zhengguo
Source:
ACS applied materials & interfaces 2020 v.12 no.15 pp. 18084-18090
ISSN:
1944-8252
Subject:
lead,   etc   ; ambient temperature; cesium; iodides; light emitting diodes; nanocrystals;     Show all 6 Subjects
Abstract:
... Stability is becoming a main issue for perovskite light-emitting diodes (PeLEDs), as their external quantum efficiency (EQE) has been boosted to above 20%. An all-inorganic perovskite, cesium lead iodide (CsPbI₃), has better stability than organic–inorganic hybrid perovskites but suffers from a transition to yellow δ-CsPbI₃ phase at room temperature. Herein, we report stabilization of the α-CsPbI₃ ...
DOI:
10.1021/acsami.9b23170

18. High-Performance Green Light-Emitting Diodes Based on MAPbBr₃ with π-Conjugated Ligand

Author:
An, Hee Ju; Kim, Yun Cheol; Kim, Do Hoon; Myoung, Jae-Min
Source:
ACS applied materials & interfaces 2020 v.12 no.14 pp. 16726-16735
ISSN:
1944-8252
Subject:
lead bromide,   etc   ; crystals; hydrophilicity; ligands; light emitting diodes; luminescence; polymers;     Show all 7 Subjects
Abstract:
... The morphology, crystal size, and trap density of perovskite films significantly affect the luminescent properties of perovskite light-emitting diodes (PeLEDs). Recently, numerous studies have been conducted on ligands that surround the surface of perovskite crystals and passivate the trap sites to improve the performance of PeLEDs. In this study, a 4-aminobenzonitrile (ABN) ligand improved the pe ...
DOI:
10.1021/acsami.0c02923

19. Structure–Electronic Property Relationships of 2D Ruddlesden–Popper Tin- and Lead-based Iodide Perovskites

Author:
Zibouche, Nourdine; Islam, M. Saiful
Source:
ACS applied materials & interfaces 2020 v.12 no.13 pp. 15328-15337
ISSN:
1944-8252
Subject:
lead,   etc   ; cations; electrons; iodides; solar energy; structure-activity relationships; tin;     Show all 7 Subjects
Abstract:
... Two-dimensional (2D) halide perovskites are receiving considerable attention for applications in photovoltaics, largely due to their versatile composition and superior environmental stability over three-dimensional (3D) perovskites, but show much lower power conversion efficiencies. Hence, further understanding of the structure–property relationships of these 2D materials is crucial for improving ...
DOI:
10.1021/acsami.0c03061

20. A supramolecular probe of cyanine dye for Pb²⁺ detection based on the recognition of a G-quadruplex from DNA duplexes

Author:
Yu, Lijia; Zhao, Han; Jing, Nannan; Shi, Xiaodong; Zhang, Yinglin; Ding, Chunguang; Zhang, Yansong; Fan, Jingguang; Tang, Yalin
Source:
Analytical methods 2020 v.12 no.9 pp. 1182-1185
ISSN:
1759-9679
Subject:
lead,   etc   ; DNA; absorption; dyes; ions; oligonucleotides; ultraviolet-visible spectroscopy;     Show all 7 Subjects
Abstract:
... Herein, we carried out the supramolecular self-assembly of cyanine dye (MTC) for the transformation between duplex DNA and G-quadruplex (T30695) for the highly selective and sensitive recognition of Pb²⁺ ions via UV-vis spectroscopy. A specific duplex DNA (duplex-a) consisting of a Pb²⁺ aptamer and its part complementary strand was constructed, which could be unwound to single-strand DNA to form a ...
DOI:
10.1039/c9ay02446h