scholarly journals Structure and Electronic Effects from Mn and Nb Co-doping for Low Band Gap BaTiO3 Ferroelectrics

2021 ◽  
Author(s):  
Soham Mukherjee ◽  
Dibya Phuyal ◽  
Carlo U. Segre ◽  
Shyamashis Das ◽  
Olof Karis ◽  
...  
Keyword(s):  
Band Gap ◽  
Electronic Effects ◽  
Low Band Gap ◽  
Co Doping

Low band gap-conjugated polymer derivatives

2005 ◽  
Vol 155 (3) ◽  
pp. 618-622 ◽  
Author(s):  
Chun-Guey Wu ◽  
Chnug-Wei Hsieh ◽  
Ding-Chou Chen ◽  
Shinn-Jen Chang ◽  
Kuo-Yu Chen
Keyword(s):  
Band Gap ◽  
Conjugated Polymer ◽  
Low Band Gap

Electronic structure engineering of tin telluride through co-doping of bismuth and indium for high performance thermoelectrics: a synergistic effect leading to a record high room temperature ZT in tin telluride

2019 ◽  
Vol 7 (16) ◽  
pp. 4817-4821 ◽  
Author(s):  
U. Sandhya Shenoy ◽  
D. Krishna Bhat
Keyword(s):  
Electronic Structure ◽  
Synergistic Effect ◽  
Band Gap ◽  
High Performance ◽  
Room Temperature ◽  
Band Offset ◽  
Valence Band Offset ◽  
Co Doping ◽  
Tin Telluride ◽  
Structure Engineering

Resonance states due to Bi and In co-doping, band gap enlargement, and a reduced valence-band offset in SnTe lead to a record high room-temperature ZT.

scholarly journals Development and Assessment of Quinoidal Index for Designing of Low Band Gap Polymers

2017 ◽  
Vol 16 (5) ◽  
pp. 123-125 ◽  
Author(s):  
Kota OTSUKI ◽  
Yoshihiro HAYASHI ◽  
Susumu KAWAUCHI
Keyword(s):  
Band Gap ◽  
Low Band Gap ◽  
Low Band Gap Polymers

scholarly journals Vacuum-Free and Highly Dense Nanoparticle Based Low-Band-Gap CuInSe2 Thin-Films Manufactured by Face-to-Face Annealing with Application of Uniaxial Mechanical Pressure

Coatings ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 484
Author(s):  
Matthias Schuster ◽  
Dominik Stapf ◽  
Tobias Osterrieder ◽  
Vincent Barthel ◽  
Peter J. Wellmann
Keyword(s):  
Thin Films ◽  
Band Gap ◽  
Coarse Grained ◽  
High Porosity ◽  
Low Band Gap ◽  
Seeding Layer ◽  
X Ray ◽  
Face To Face ◽  
Copper Indium ◽  
Vis Spectroscopy

Copper indium gallium sulfo-selenide (CIGS) based solar cells show the highest conversion efficiencies among all thin-film photovoltaic competition. However, the absorber material manufacturing is in most cases dependent on vacuum-technology like sputtering and evaporation, and the use of toxic and environmentally harmful substances like H2Se. In this work, the goal to fabricate dense, coarse grained CuInSe2 (CISe) thin-films with vacuum-free processing based on nanoparticle (NP) precursors was achieved. Bimetallic copper-indium, elemental selenium and binary selenide (Cu2−xSe and In2Se3) NPs were synthesized by wet-chemical methods and dispersed in nontoxic solvents. Layer-stacks from these inks were printed on molybdenum coated float-glass-substrates via doctor-blading. During the temperature treatment, a face-to-face technique and mechanically applied pressure were used to transform the precursor-stacks into dense CuInSe2 films. By combining liquid phase sintering and pressure sintering, and using a seeding layer later on, issues like high porosity, oxidation, or selenium- and indium-depletion were overcome. There was no need for external Se atmosphere or H2Se gas, as all of the Se was directly in the precursor and could not leave the face-to-face sandwich. All thin-films were characterized with scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and UV/vis spectroscopy. Dense CISe layers with a thickness of about 2–3 µm and low band gap energies of 0.93–0.97 eV were formed in this work, which show potential to be used as a solar cell absorber.

Synthesis and Characterization of an Anthracene-Based Low Band Gap Polymer for Photovoltaic Devices

2014 ◽  
Vol 14 (8) ◽  
pp. 6422-6426 ◽  
Author(s):  
In Hwan Jung ◽  
Hoyeon Kim ◽  
Wonho Lee ◽  
Byung Jun Jung ◽  
Han Young Woo ◽  
...  
Keyword(s):  
Band Gap ◽  
Synthesis And Characterization ◽  
Photovoltaic Devices ◽  
Low Band Gap ◽  
Low Band Gap Polymer

Low-band gap copolymers based on diketopyrrolopyrrole and dibenzosilole and their application in organic photovoltaics

2017 ◽  
Vol 146 ◽  
pp. 73-81 ◽  
Author(s):  
Yeon Hee Ha ◽  
Jisu Hong ◽  
Tae Kyu An ◽  
Hui-Jun Yun ◽  
Kyunghun Kim ◽  
...  
Keyword(s):  
Band Gap ◽  
Organic Photovoltaics ◽  
Low Band Gap
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