The Study of Photoactive Materials

2020 ◽  
Vol 10 (3-4) ◽  
pp. 73-111
Author(s):  
A. V. Emeline ◽  
R. V. Mikhaylov ◽  
P. E. Lavrik ◽  
A. V. Kozhevina ◽  
K. M. Bulanin ◽  
...  
Keyword(s):  
Photoactive Materials

scholarly journals Self-Powered All-Inorganic Perovskite Photodetectors with Fast Response Speed

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Ting Zhang ◽  
Shibin Li
Keyword(s):  
High Performance ◽  
Solution Process ◽  
Response Speed ◽  
Fast Response ◽  
Single Step ◽  
Inorganic Perovskite ◽  
Perovskite Materials ◽  
Photoactive Materials ◽  
Self Powered ◽  
Solvent Processing

AbstractIn this manuscript, the inorganic perovskite CsPbI2Br and CsPbIBr2 are investigated as photoactive materials that offer higher stability than the organometal trihalide perovskite materials. The fabrication methods allow anti-solvent processing the CsPbIxBr3−x films, overcoming the poor film quality that always occur in a single-step solution process. The introduced diethyl ether in spin-coating process is demonstrated to be successful, and the effects of the anti-solvent on film quality are studied. The devices fabricated using the methods achieve high-performance, self-powered and the stabilized photodetectors show fast response speed. The results illustrate a great potential of all-inorganic CsPbIxBr3−x perovskites in visible photodetection and provide an effective way to achieve high performance devices with self-powered capability.

Electronic Structure and Optical Properties of Non-Metals (N, F, P, Cl, S)-Doped Cubic NaTaO3 by Density Functional Theory

2009 ◽  
Vol 79-82 ◽  
pp. 1245-1248 ◽  
Author(s):  
Pei Lin Han ◽  
Xiao Jing Wang ◽  
Yan Hong Zhao ◽  
Chang He Tang
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
Electronic Structure ◽  
Visible Light ◽  
Absorption Edge ◽  
Density Functional ◽  
Red Shift ◽  
Functional Theory ◽  
Photoactive Materials ◽  
Metal Doped

Electronic structure and optical properties of non-metals (N, S, F, P, Cl) -doped cubic NaTaO3 were investigated systematically by density functional theory (DFT). The results showed that the substitution of (N, S, P, Cl) for O in NaTaO3 was effective in narrowing the band-gap relative to the F-doped NaTaO3. The larger red shift of the absorption edge and the higher visible light absorption at about 520 nm were found for the (N and P)-doped NaTaO3. The excitation from the impurity states to the conduction band may account for the red shift of the absorption edge in an electron-deficiency non-metal doped NaTaO3. The obvious absorption in the visible light region for (N and P)-doped NaTaO3 provides an important guidance for the design and preparation of the visible light photoactive materials.

A Highly Luminescent Hexanuclear Molybdenum Cluster - A Promising Candidate toward Photoactive Materials

2012 ◽  
Vol 2012 (19) ◽  
pp. 3107-3111 ◽  
Author(s):  
Kaplan Kirakci ◽  
Pavel Kubát ◽  
Michal Dušek ◽  
Karla Fejfarová ◽  
Václav Šícha ◽  
...  
Keyword(s):  
Promising Candidate ◽  
Molybdenum Cluster ◽  
Photoactive Materials ◽  
Cluster A

scholarly journals Development of polymer–fullerene solar cells

2016 ◽  
Vol 3 (2) ◽  
pp. 222-239 ◽  
Author(s):  
Fengling Zhang ◽  
Olle Inganäs ◽  
Yinhua Zhou ◽  
Koen Vandewal
Keyword(s):  
Solar Cells ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Free Charge Carrier ◽  
Interfacial Layers ◽  
New Device ◽  
Device Structures ◽  
Photoactive Materials ◽  
Conversion Efficiencies

Abstract Global efforts and synergetic interdisciplinary collaborations on solution-processed bulk-heterojunction polymer solar cells (PSCs or OPVs) made power conversion efficiencies over 10% possible. The rapid progress of the field is credited to the synthesis of a large number of novel polymers with specially tunable optoelectronic properties, a better control over the nano-morphology of photoactive blend layers, the introduction of various effective interfacial layers, new device architectures and a deeper understanding of device physics. We will review the pioneering materials for polymer–fullerene solar cells and trace the progress of concepts driving their development. We discuss the evolution of morphology control, interfacial layers and device structures fully exploring the potential of photoactive materials. In order to guide a further increase in power conversion efficiency of OPV, the current understanding of the process of free charge carrier generation and the origin of the photovoltage is summarized followed by a perspective on how to overcome the limitations for industrializing PSCs.

The Role of Photoactive Materials Based on Tetrapyrrolic Macrocycles in Antimicrobial Photodynamic Therapy

2022 ◽  
pp. 201-277
Author(s):  
Mariana Q. Mesquita ◽  
Cristina J. Dias ◽  
Maria G. P. M. S. Neves ◽  
Adelaide Almeida ◽  
M. Amparo F. Faustino
Keyword(s):  
Photodynamic Therapy ◽  
Antimicrobial Photodynamic Therapy ◽  
Photoactive Materials

scholarly journals Two-electron transfer stabilized by excited-state aromatization

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Jinseok Kim ◽  
Juwon Oh ◽  
Seongchul Park ◽  
Jose L. Zafra ◽  
Justin R. DeFrancisco ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Excited States ◽  
Transfer Process ◽  
Comprehensive Understanding ◽  
Electron Transfer Process ◽  
Photoactive Materials ◽  
Donor Acceptor ◽  
Scientific Significance

Abstract The scientific significance of excited-state aromaticity concerns with the elucidation of processes and properties in the excited states. Here, we focus on TMTQ, an oligomer composed of a central 1,6-methano[10]annulene and 5-dicyanomethyl-thiophene peripheries (acceptor-donor-acceptor system), and investigate a two-electron transfer process dominantly stabilized by an aromatization in the low-energy lying excited state. Our spectroscopic measurements quantitatively observe the shift of two π-electrons between donor and acceptors. It is revealed that this two-electron transfer process accompanies the excited-state aromatization, producing a Baird aromatic 8π core annulene in TMTQ. Biradical character on each terminal dicyanomethylene group of TMTQ allows a pseudo triplet-like configuration on the 8π core annulene with multiexcitonic nature, which stabilizes the energetically unfavorable two-charge separated state by the formation of Baird aromatic core annulene. This finding provides a comprehensive understanding of the role of excited-state aromaticity and insight to designing functional photoactive materials.

Tellurium complex polyhalides: narrow bandgap photoactive materials for electronic applications

2020 ◽  
Vol 8 (42) ◽  
pp. 21988-21992
Author(s):  
Artyom V. Novikov ◽  
Andrey N. Usoltsev ◽  
Sergey A. Adonin ◽  
Andrey A. Bardin ◽  
Denis G. Samsonenko ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Halogen Bonding ◽  
Narrow Bandgap ◽  
Photoactive Materials ◽  
Novel Complex ◽  
Bandgap Semiconductors

We report a novel complex polyhalide family (A2TeBr6I2), containing [TeBr6]2− octahedra interconnected by I2 bridge-molecules via halogen bonding. They are narrow bandgap semiconductors, show strong photoresponse and are easily synthesized from aqueous solution.

Advanced Functional Electroactive and Photoactive Materials for Monitoring the Environmental Pollutants

2020 ◽  
pp. 2008227
Author(s):  
Kai Yan ◽  
Padmanathan Karthick Kannan ◽  
Dulyawat Doonyapisut ◽  
Kangbing Wu ◽  
Chan‐Hwa Chung ◽  
...  
Keyword(s):  
Environmental Pollutants ◽  
Photoactive Materials
Sign in / Sign up

Export Citation Format

Share Document